作者：
Li Yaqi;Dai Yimin;Cai Ling;Yang Siwen;Wang Junlong;...
期刊：
Journal of Molecular Liquids,2025年424:126995 ISSN：0167-7322
作者机构：
[Li Yaqi; Dai Yimin; Cai Ling; Yang Siwen; Wang Junlong; Liu Bo; Ding Xianglong; Zhang Yue-Fei; Li Yan; Lu Cuihong; Wan Li] School of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science and Technology, Changsha 410114 PR China
摘要：
Using aniline and environmentally friendly chitosan as raw materials, MnFe 2 O 4 with photocatalytic properties was introduced and in-situ polymerization was used to prepare Cht/PANI/MnFe 2 O 4 . The Cht/PANI/MnFe 2 O 4 was characterized by FTIR, SEM, XPS, XRD, BET and TGA. The experiment on the influence of pH on the adsorption capacity of the material shows that an acidic environment is conducive to the adsorption of fuel by the adsorbent. The zero charge point (pH PZC ) on the adsorbent surface is obtained at pH 6.45. The adsorption kinetic model conformed to the pseudo second order model, and the adsorption isotherm was in agreement with the Langmuir isotherm model. The q max values of Cht/PANI/MnFe 2 O 4 and Cht/PANI were 202.84 and 148.37 mg·g −1 . Experimental results have shown that Cht/PANI/MnFe 2 O 4 exhibits photocatalytic performance, which is superior to pure MnFe 2 O 4 .The maximum removal amount of Cht/PANI/MnFe 2 O 4 at equilibrium is 2569.66 mg·g −1 . The photocatalytic process of Cht/PANI/MnFe 2 O 4 also conforms to the pseudo-second-order kinetic model. The material has the advantages of simplicity and environmental friendliness and has potential application prospects in the purification of dye wastewater. The study proposed possible mechanisms for the adsorption and photocatalysis of CR.
Using aniline and environmentally friendly chitosan as raw materials, MnFe 2 O 4 with photocatalytic properties was introduced and in-situ polymerization was used to prepare Cht/PANI/MnFe 2 O 4 . The Cht/PANI/MnFe 2 O 4 was characterized by FTIR, SEM, XPS, XRD, BET and TGA. The experiment on the influence of pH on the adsorption capacity of the material shows that an acidic environment is conducive to the adsorption of fuel by the adsorbent. The zero charge point (pH PZC ) on the adsorbent surface is obtained at pH 6.45. The adsorption kinetic model conformed to the pseudo second order model, and the adsorption isotherm was in agreement with the Langmuir isotherm model. The q max values of Cht/PANI/MnFe 2 O 4 and Cht/PANI were 202.84 and 148.37 mg·g −1 . Experimental results have shown that Cht/PANI/MnFe 2 O 4 exhibits photocatalytic performance, which is superior to pure MnFe 2 O 4 .The maximum removal amount of Cht/PANI/MnFe 2 O 4 at equilibrium is 2569.66 mg·g −1 . The photocatalytic process of Cht/PANI/MnFe 2 O 4 also conforms to the pseudo-second-order kinetic model. The material has the advantages of simplicity and environmental friendliness and has potential application prospects in the purification of dye wastewater. The study proposed possible mechanisms for the adsorption and photocatalysis of CR.
期刊：
Journal of Food Composition and Analysis,2025年:107804 ISSN：0889-1575
通讯作者：
Shuang Li<&wdkj&>Xianghong Li
作者机构：
[Jiayi Liu; Xinyi Yan; Faxiang Wang; Yongle Liu; Shuang Li; Xianghong Li] Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China;[Bin He] Hunan Fisheries Science Institute, Changsha 410153, Hunan Province, China
通讯机构：
[Shuang Li; Xianghong Li] H;Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China
摘要：
This study investigated the synergistic effects of trehalose incorporation, precooking methods (steaming and frying) and reheating on optimizing the textural and flavor profiles of frozen precooked Chinese shrimp ( Fenneropenaeus chinensis ) products. Incorporating trehalose soaking before precooking treatments imparted the shrimp attractive red-yellow coloration while achieved notable reductions in cooking loss (steamed: 22.87%→17.31%; fried: 32.57%→25.58%) and freeze-thaw loss (steamed: 5.92%→2.29%; fried: 2.68%→1.07%). Steaming pretreatment combined with trehalose soaking effectively inhibited ice crystal formation in the shrimp, resulted in relatively intact fibrous tissue during frozen storage and promoted the production of taste and odor in the products. Subsequent microwave reheating substantially enriched desirable flavor compounds of the frozen precooked shrimps. The results indicated that synergistic application of trehalose soaking and steaming precooking effectively mitigated the quality deterioration of precooked shrimp during frozen storage. These findings established an innovative processing strategy that enhanced both the sensory quality and commercial viability of frozen precooked shrimp products.
This study investigated the synergistic effects of trehalose incorporation, precooking methods (steaming and frying) and reheating on optimizing the textural and flavor profiles of frozen precooked Chinese shrimp ( Fenneropenaeus chinensis ) products. Incorporating trehalose soaking before precooking treatments imparted the shrimp attractive red-yellow coloration while achieved notable reductions in cooking loss (steamed: 22.87%→17.31%; fried: 32.57%→25.58%) and freeze-thaw loss (steamed: 5.92%→2.29%; fried: 2.68%→1.07%). Steaming pretreatment combined with trehalose soaking effectively inhibited ice crystal formation in the shrimp, resulted in relatively intact fibrous tissue during frozen storage and promoted the production of taste and odor in the products. Subsequent microwave reheating substantially enriched desirable flavor compounds of the frozen precooked shrimps. The results indicated that synergistic application of trehalose soaking and steaming precooking effectively mitigated the quality deterioration of precooked shrimp during frozen storage. These findings established an innovative processing strategy that enhanced both the sensory quality and commercial viability of frozen precooked shrimp products.
关键词：
Calcium salt of hexahydrophthalic acid;Crystal water;Nucleation efficiency;Mechanical property;Isotactic polypropylene;Nucleating agent
摘要：
The calcium salt of hexahydrophthalic acid (HHPA-Ca), an effective nucleating agent for isotactic polypropylene (iPP), was synthesized through neutralization. The presence of crystal water in HHPA-Ca may significantly influence the processing and performance of iPP. In this study, HHPA-Ca was dehydrated to eliminate crystal water (HHPA-Ca-RCW), and its properties were compared to those of undehydrated HHPA-Ca (HHPA-Ca-CW). The structural characteristics of HHPA-Ca, both before and after the removal of crystal water, were analyzed using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The influence of crystal water on the nucleation of iPP was investigated via differential scanning calorimetry (DSC), polarized optical microscopy (POM), and mechanical property testing. The results demonstrate that HHPA-Ca-RCW exhibits higher nucleation efficiency in iPP, leading to an increase of 8.1 degrees C in the crystallization peak temperature (Tc) upon the addition of 0.04 mass%. This modification also promotes the rapid formation of a significant number of spherical crystals. Moreover, HHPA-Ca-RCW, when incorporated into nucleated iPP, maintains toughness of iPP while showing a modest enhancement in stiffness.
通讯机构：
[Cao, Z ] C;[Xu, F; Sun, LX ] G;Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Changsha 410114, Peoples R China.;Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China.;Guilin Univ Elect Technol, Guangxi Collaborat Innovat Ctr Struct & Properties, Sch Mat Sci & Engn, Guilin 541004, Peoples R China.
摘要：
Developing a highly sensitive enzyme-free glucose sensor is critical, given the significant health risks posed by diabetes. In this study, a ZnO@CuCo2O4 composite with a novel flower-like heterostructure assembled by nanorods is prepared utilizing straightforward hydrothermal and calcination processes. The core-shell ZnO@CuCo2O4 featuring ZnO as the core and CuCo2O4 as the shell can improve the agglomeration phenomenon of CuCo2O4, expose more active sites, and promote efficient electron transfer. A ZnO@CuCo2O4 based non-enzyme glucose sensor is constructed and tested for the first time, which exhibits good sensing performance, a low limit of detection of 0.82 mu M, with broad linear ranges of 10-1725 mu M and 1725-9225 mu M, yielding sensitivities of 898 and 524 mu A mM-1 cm-2, respectively, and a rapid response time of only 2 seconds. Furthermore, it shows excellent selectivity, long-term stability (retaining 92.42% of its initial response current after 20 days), and good reproducibility, including in real saliva samples. The superior sensing performance of the ZnO@CuCo2O4 sensor can be attributed to the synergistic effects of the core-shell n-p heterostructure, the integration of amorphous and crystalline dual phases, and the flower-like structure, which collectively optimize electron transfer and electrocatalytic activity. This work offers a cost-effective and innovative strategy for advancing enzyme-free glucose sensing technologies.
摘要：
The limited gel-forming ability and poor storage stability of unwashed surimi hinder its large-scale industrial adoption, requiring targeted solutions. This study aimed to investigate the gel enhancement, antioxidant and cryoprotective effects of enzyme-assisted extracted surimi by-product proteins (EAE-SBPs) on unwashed surimi. The EAE-SBPs were characterized and then incorporated into surimi system to evaluate their influences on the quality of freeze-thaw (FT) treated raw surimi or surimi gel. The results revealed that EAE-SBPs exhibited triple cryoprotective activity (54.90 % yeast cell viability), antioxidant capacity (58.72 % DPPH radical scavenging rate), and gel-strengthening capability. Compared to controls, the raw surimi containing EAE-SBPs demonstrated significantly retarded reduction in protein Ca 2+ -ATPase activities, and mitigated increase in TBARS levels and protein carbonyl contents during FT process ( p < 0.05). After 6 FT cycles, a significantly higher ( p < 0.05) gel strength, water holding capacity, and structural integrity of gel network, as well as a more restricted water migration and ice crystal growth, were observed in the EAE-SBPs-added surimi gels than those in controls. These findings offer a knowledge on severing EAE-SBPs as a concurrent cryoprotectant, antioxidant and gel enhancer in unwashed surimi processing, ultimately contributing to the production of unwashed surimi with enhanced quality.
The limited gel-forming ability and poor storage stability of unwashed surimi hinder its large-scale industrial adoption, requiring targeted solutions. This study aimed to investigate the gel enhancement, antioxidant and cryoprotective effects of enzyme-assisted extracted surimi by-product proteins (EAE-SBPs) on unwashed surimi. The EAE-SBPs were characterized and then incorporated into surimi system to evaluate their influences on the quality of freeze-thaw (FT) treated raw surimi or surimi gel. The results revealed that EAE-SBPs exhibited triple cryoprotective activity (54.90 % yeast cell viability), antioxidant capacity (58.72 % DPPH radical scavenging rate), and gel-strengthening capability. Compared to controls, the raw surimi containing EAE-SBPs demonstrated significantly retarded reduction in protein Ca 2+ -ATPase activities, and mitigated increase in TBARS levels and protein carbonyl contents during FT process ( p < 0.05). After 6 FT cycles, a significantly higher ( p < 0.05) gel strength, water holding capacity, and structural integrity of gel network, as well as a more restricted water migration and ice crystal growth, were observed in the EAE-SBPs-added surimi gels than those in controls. These findings offer a knowledge on severing EAE-SBPs as a concurrent cryoprotectant, antioxidant and gel enhancer in unwashed surimi processing, ultimately contributing to the production of unwashed surimi with enhanced quality.
摘要：
Aptamers have recently become novel probes for biosensors because of their good biocompatibility, strong specificity, and high sensitivity. Biosensors based on peptides or nucleic acid aptamers are used in implantable and wearable devices owing to their ease of synthesis and economic efficiency. Simultaneously, amphoteric ionic peptides are being explored as antifouling layers for biosensors resistant to interference from extraneous proteins in serum. Thus, this paper reviews recently developed aptamer-based biosensors and introduces peptide- and nucleic acid-based biosensors, while focusing on the three primary classes of biosensors: electrochemical sensors, fluorescent or colorimetric biosensors, and electroluminescent sensors. Furthermore, we summarize their general construction strategies, describe specific electrochemical sensors that use peptides as an antipollution layer, and elucidate their advantages.
摘要：
This study investigated the effects of silver carp muscle hydrolysate (SCMH) on volatile odor characteristics in frozen dough (FD) and its derived products using electronic nose and gas chromatography-mass spectrometry (GC-MS) analyses. Results demonstrated that steamed bread (SB) prepared from SCMH-incorporated FD after six freeze-thaw cycles exhibited significantly improved specific volume, textural properties, and gas-cell structure compared to controls (p<0.05). GC-MS identified 29 volatile compounds in SCMH, predominantly 2,3-butanediol (32.05%) and 1-penten-3-ol (22.88%). SCMH addition altered the olfactory sense and volatile profiles of FD, yet introduced no undesirable fishy odor substances in the final SB. Moreover, the volatile compounds in dough and SB were mainly enriched during dough fermentation, while the key aroma components, such as 3-methyl-1-butanol, 3-methylthio-1-propanol, phenethyl alcohol, 3-hydroxy-2-butanone, and 2,3-butanediol, were enhanced by adding SCMH. These findings suggested that SCMH could effectively maintain the quality of FD without compromising its final product flavor, while potentially improving the aroma characteristics of SB, although the detailed mechanism remained to be further clarified.
作者机构：
[Chengzhi Yuan; Haidong Liu; Faxiang Wang; Jian Yu; Xianghong Li; Yiqun Huang; Yongle Liu] Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, School of food science and bioengineering, Changsha University of Science and Technology, Changsha 410114, China
通讯机构：
[Faxiang Wang] H;Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, School of food science and bioengineering, Changsha University of Science and Technology, Changsha 410114, China
摘要：
This study aimed to investigate the improvement effects of a silver carp muscle hydrolysate (SCMH) on freeze-thaw (FT) tolerance of baker's yeast and the related mechanism. Yeast cells with or without addition of SCMH were subjected to 0 to 6 FT cycles, and their cell viability, leavening activity, growth kinetics, morphology, and transcriptome were examined. The results showed that the SCMH-added yeast had significantly higher cell viability (40.7%), leavening activity (473.2 mL·kg -1 ·h -1 ), and maximum specific growth rate (2.63 h -1 ) than those in control (CK) group (0%, 287.2 mL·kg -1 ·h -1 , and 1.74 h -1 , respectively), after 6 FT cycles. Frozen-thawed yeast with SCMH also exhibited better cell structural integrity compared to that of the CK yeast. Transcriptomic analysis revealed that the incorporation of SCMH led to significantly increased counts of differentially expressed genes (DEGs) in yeast cells after 6 FT cycles, and transcriptionally regulated the pathways associated with ribosome biogenesis and function, amino acid metabolism, carbohydrate metabolism, and lipid metabolism. Therefore, the SCMH could help yeast withstand FT stress, likely via a dual mechanism for inhibiting ice growth and inducing some freeze-adapted transcriptional regulation.
This study aimed to investigate the improvement effects of a silver carp muscle hydrolysate (SCMH) on freeze-thaw (FT) tolerance of baker's yeast and the related mechanism. Yeast cells with or without addition of SCMH were subjected to 0 to 6 FT cycles, and their cell viability, leavening activity, growth kinetics, morphology, and transcriptome were examined. The results showed that the SCMH-added yeast had significantly higher cell viability (40.7%), leavening activity (473.2 mL·kg -1 ·h -1 ), and maximum specific growth rate (2.63 h -1 ) than those in control (CK) group (0%, 287.2 mL·kg -1 ·h -1 , and 1.74 h -1 , respectively), after 6 FT cycles. Frozen-thawed yeast with SCMH also exhibited better cell structural integrity compared to that of the CK yeast. Transcriptomic analysis revealed that the incorporation of SCMH led to significantly increased counts of differentially expressed genes (DEGs) in yeast cells after 6 FT cycles, and transcriptionally regulated the pathways associated with ribosome biogenesis and function, amino acid metabolism, carbohydrate metabolism, and lipid metabolism. Therefore, the SCMH could help yeast withstand FT stress, likely via a dual mechanism for inhibiting ice growth and inducing some freeze-adapted transcriptional regulation.
作者机构：
[Yuchun Li; Yin Ma; Ziqian Zhou; Zhong Dai] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China;[Lei Pu] Department of Burns, The Southwest Hospital of AMU, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing 400038, China
通讯机构：
[Zhong Dai] H;Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China
摘要：
Supercapacitors have emerged as a popular area of research due to their exceptional attributes, including excellent cycling life, admirable power density, and rapid charge/discharge capabilities. However, the low energy density significantly restricts its range of applicable scenarios. Herein, the grafting copolymerization technique was employed to incorporate transition metals (nickel, cobalt) into the molecular chain of lignin, and lignin-based pseudocapacitor material (Ni/Co@LC) is obtained after thermal treatment. XRD, X-ray photoelectron spectroscopy, scanning electron microscopy, and energy dispersive spectrometry results demonstrate a strong interaction between Ni/Co and carbon, with the transition metals encapsulated within a carbon shell. Hence, the Ni/Co@LC exhibits an approximately 69% increase in specific capacitance compared with those conventional pseudocapacitor materials which Ni/Co coated on the surface of carbon materials, and the equivalent series resistance is reduced by about 50%. Moreover, the assembled asymmetric supercapacitors of Ni/Co@LC//LC achieve an energy density of 52.89 W h kg(-1) at a power density of 640 W kg(-1) and maintain a capacitance retention rate of 99.28% after undergoing 10,000 charge-discharge cycles. This work presents a novel approach for designing pseudocapacitor electrode materials with low impedance and high cycling performance.
摘要：
In this study, a porous magnetic CoFe 2 O 4-x /expanded graphite (CFE) composite catalyst based on the interlayer confinement strategy of expanded graphite was successfully constructed, and a high-density oxygen vacancy (OVs) system was successfully constructed through the unique spatial confinement effect. This synthesis strategy enables CFE materials to obtain enhanced surface area, accelerated electron transfer ability and abundant OVs, which jointly promote the significant enhancement of pollutant removal ability. The quasi first-order kinetic constant (0.50351 min −1 ) of CFE-20 composite was higher than that of pure CoFe 2 O 4 (0.00762 min −1 ). Under the conditions of low catalyst dosage (0.5 g L −1 ) and trace PMS activation (1 mmol L −1 ), the removal rate of 50 mg L −1 TC in 30 mins was 87.3 %. This study revealed the OVs mediated two-way activation mechanism, and the main active species were singlet oxygen ( 1 O 2 ) and superoxide radicals (•O 2 − ). It successfully broke through the bottleneck of the traditional PMS activation system sensitive to pH conditions, and maintained excellent degradation efficiency in the range of pH 3–11. Through HPLC-MS and Fukui function calculation, the degradation path of TC and the ecotoxicity evolution of its intermediate products were systematically clarified. In conclusion, CoFe 2 O 4-x /EG composite has excellent activation degradation and environmental protection performance, and has the potential to enhance the activated PMS wastewater treatment process, which provides further support for the application of advanced oxidation technology in wastewater treatment.
In this study, a porous magnetic CoFe 2 O 4-x /expanded graphite (CFE) composite catalyst based on the interlayer confinement strategy of expanded graphite was successfully constructed, and a high-density oxygen vacancy (OVs) system was successfully constructed through the unique spatial confinement effect. This synthesis strategy enables CFE materials to obtain enhanced surface area, accelerated electron transfer ability and abundant OVs, which jointly promote the significant enhancement of pollutant removal ability. The quasi first-order kinetic constant (0.50351 min −1 ) of CFE-20 composite was higher than that of pure CoFe 2 O 4 (0.00762 min −1 ). Under the conditions of low catalyst dosage (0.5 g L −1 ) and trace PMS activation (1 mmol L −1 ), the removal rate of 50 mg L −1 TC in 30 mins was 87.3 %. This study revealed the OVs mediated two-way activation mechanism, and the main active species were singlet oxygen ( 1 O 2 ) and superoxide radicals (•O 2 − ). It successfully broke through the bottleneck of the traditional PMS activation system sensitive to pH conditions, and maintained excellent degradation efficiency in the range of pH 3–11. Through HPLC-MS and Fukui function calculation, the degradation path of TC and the ecotoxicity evolution of its intermediate products were systematically clarified. In conclusion, CoFe 2 O 4-x /EG composite has excellent activation degradation and environmental protection performance, and has the potential to enhance the activated PMS wastewater treatment process, which provides further support for the application of advanced oxidation technology in wastewater treatment.
通讯机构：
[Li, W ; Dai, YM] C;Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Hunan Prov Key Lab Cytochem, Changsha 410114, Peoples R China.
摘要：
The frequent leakage of crude oil and the illegal discharge of industrial organic pollutants have caused serious damage to the ecological environment and the loss of valuable resources. In this paper, we introduce a sponge with magnetic and photothermal properties. Polydopamine and ferric oxide (Fe3O4) were grafted onto the sponge, self-assembled on the three-dimensional (3D) skeleton surface by Zif material, and grafted with cetyltrimethoxysilane to make the modified sponge highly hydrophobic (water contact angle = 155 degrees). Moreover, due to the dual photothermal conversion properties of polydopamine and ferric oxide (Fe3O4), the modified sponge can be quickly heated to 110 degrees C under light (1.25 kw/m2). The modified sponge demonstrated excellent crude oil adsorption capacity (44 g/g) and recyclability. Due to its magnetic properties (saturated magnetization = 4.43 emu/g), derived from the incorporation of Fe3O4, the sponge could be remotely controlled for adsorption. Moreover, it demonstrated the ability to continuously adsorb and collect light oil from the water surface with the aid of a peristaltic pump. The sponge also functioned as an efficient filter for separating heavy oil underwater through liquid gravity, achieving a separation efficiency of 97.2%. Therefore, this composite sponge not only presents a promising solution for crude oil spill remediation but also holds significant potential for industrial wastewater treatment, making it highly relevant for practical environmental applications.
摘要：
Metal free carbon materials such as graphene, diamond, and carbon nanotubes are becoming alternative catalysts for peroxymonosulfate (PMS) activation to avoid drawbacks of traditional transition metal-containing catalysts, such as leaching of metal ions and harshing usage environments. However, these new catalysts have drawbacks such as complex processes and high synthesis costs. Herein, in this study, graphite with a unique "multilayer cake" structure was prepared as an efficient peroxymonosulfate (PMS) activator to degrade the antibiotic in the wastewater. Specifically, by optimizing the spacing between graphite layers, the expanded graphite (EG) exhibited exceptional performance, achieving over 80 % removal of tetracycline (TC) molecules within 15 mins. The enhancement of PMS activation ability is attributed to the enhanced electronic conductivity and adsorption capacity of EG. Notably, the electron-donating capability of EG facilitates a degradation mechanism dominated by singlet oxygen ( 1 O 2 ) rather than conventional free radicals (SO 4 •− , •OH), imparting the system with enhanced environmental adaptability. Furthermore, the facilitated electron transfer between pollutants and EG accelerates degradation. Compared with reported，The inherent hydrophobicity and excellent stability of graphite enable self-separation and reusability, ensuring cost-effectiveness and practicality. Collectively, this study highlights the promising application of the highly self-separating "multilayer cake" structured EG catalyst as a low-cost, high-efficiency PMS activator, offering valuable insights into the practical deployment of carbon-based materials in Fenton-like catalytic systems.
Metal free carbon materials such as graphene, diamond, and carbon nanotubes are becoming alternative catalysts for peroxymonosulfate (PMS) activation to avoid drawbacks of traditional transition metal-containing catalysts, such as leaching of metal ions and harshing usage environments. However, these new catalysts have drawbacks such as complex processes and high synthesis costs. Herein, in this study, graphite with a unique "multilayer cake" structure was prepared as an efficient peroxymonosulfate (PMS) activator to degrade the antibiotic in the wastewater. Specifically, by optimizing the spacing between graphite layers, the expanded graphite (EG) exhibited exceptional performance, achieving over 80 % removal of tetracycline (TC) molecules within 15 mins. The enhancement of PMS activation ability is attributed to the enhanced electronic conductivity and adsorption capacity of EG. Notably, the electron-donating capability of EG facilitates a degradation mechanism dominated by singlet oxygen ( 1 O 2 ) rather than conventional free radicals (SO 4 •− , •OH), imparting the system with enhanced environmental adaptability. Furthermore, the facilitated electron transfer between pollutants and EG accelerates degradation. Compared with reported，The inherent hydrophobicity and excellent stability of graphite enable self-separation and reusability, ensuring cost-effectiveness and practicality. Collectively, this study highlights the promising application of the highly self-separating "multilayer cake" structured EG catalyst as a low-cost, high-efficiency PMS activator, offering valuable insights into the practical deployment of carbon-based materials in Fenton-like catalytic systems.
通讯机构：
[Sun, LX; Xu, F ] G;[Pan, HG ] X;Xian Technol Univ, Sch New Energy Sci & Technol, Xian 710021, Peoples R China.;Guilin Univ Elect Technol, Sch Mat Sci & Engn, 1 Jinji Rd, Guilin 541004, Peoples R China.
关键词：
Supercapacitor;Hydrogel electrolytes;Aqueous polyurethanes;Silver nanowires;Thin film electrodes;Self-healing materials
摘要：
Manufacturing highly chemically stable and flexible all-solid-state supercapacitors (ASCs) is still a challenge, especially for portable applications subjected to mechanical stress. In this work, the electrolyte, prepared from cellulose nanofibers reinforced with gel substrates of polyvinyl alcohol and aqueous polyurethane, exhibits exceptional self-healing properties and high elasticity (stretchable up to 553 %). On the other hand, the electrode material, prepared by adding silver nanowires into aqueous polyurethane, demonstrates a high surface capacitance (578 mF cm −2 ) and excellent transparency. The ASC, constructed based on their integration, exhibits good energy/power density (19.5 μWh cm −2 /503.7 μW cm −2 ), along with a high surface capacitance (390 mF cm −2 ) due to the strong stability and compatibility between the electrodes and the electrolyte. Furthermore, it displays excellent chemical stability, with minimal loss of electrical capacitance under various bending conditions. This work provides design inspiration for developing reliable energy storage devices with significant potential for integration into wearable applications.
Manufacturing highly chemically stable and flexible all-solid-state supercapacitors (ASCs) is still a challenge, especially for portable applications subjected to mechanical stress. In this work, the electrolyte, prepared from cellulose nanofibers reinforced with gel substrates of polyvinyl alcohol and aqueous polyurethane, exhibits exceptional self-healing properties and high elasticity (stretchable up to 553 %). On the other hand, the electrode material, prepared by adding silver nanowires into aqueous polyurethane, demonstrates a high surface capacitance (578 mF cm −2 ) and excellent transparency. The ASC, constructed based on their integration, exhibits good energy/power density (19.5 μWh cm −2 /503.7 μW cm −2 ), along with a high surface capacitance (390 mF cm −2 ) due to the strong stability and compatibility between the electrodes and the electrolyte. Furthermore, it displays excellent chemical stability, with minimal loss of electrical capacitance under various bending conditions. This work provides design inspiration for developing reliable energy storage devices with significant potential for integration into wearable applications.
摘要：
Pollution caused by the excessive use of phosphate has attracted widespread attention. In this study, Zr-La MOF-derived carbon (ZLMCs) electrode was prepared to remove phosphorus from water via the electroassisted adsorption (EAA) method. The crystal structure of ZLMOF induces defects that provide active sites for phosphate uptake. In comparison to alternative adsorption materials, ZLMC-16 achieves 143.0 mg g –1 (80 % full capacity) in one hour and 178.8 mg g –1 in three hours. In addition, the spontaneous adsorption of phosphorus was observed to be heat-absorbing, in line with the proposed pseudo-second-order kinetics and Langmuir isotherm model. FTIR and XPS analyses indicated that chemical bonding and electrostatic gravitational forces between La/Zr-O-P play a key role in the phosphate trapping mechanism. Under electric field, PO 4 3- was rapidly transferred from the aqueous solution to the electrode surface and can reach deeper adsorption sites. Furthermore, ZLMC-16 demonstrated high selectivity for PO 4 3- in the presence of common interfering ions (SO 4 2- , Cl - , and NO 3 – ) and an efficient adsorption capacity between pH 3–7. In conclusion, our work shows that ZLMC electrodes with fiber additions have good potential for efficient phosphate removal and recovery, which will promote the application of electroassisted adsorption in wastewater treatment.
Pollution caused by the excessive use of phosphate has attracted widespread attention. In this study, Zr-La MOF-derived carbon (ZLMCs) electrode was prepared to remove phosphorus from water via the electroassisted adsorption (EAA) method. The crystal structure of ZLMOF induces defects that provide active sites for phosphate uptake. In comparison to alternative adsorption materials, ZLMC-16 achieves 143.0 mg g –1 (80 % full capacity) in one hour and 178.8 mg g –1 in three hours. In addition, the spontaneous adsorption of phosphorus was observed to be heat-absorbing, in line with the proposed pseudo-second-order kinetics and Langmuir isotherm model. FTIR and XPS analyses indicated that chemical bonding and electrostatic gravitational forces between La/Zr-O-P play a key role in the phosphate trapping mechanism. Under electric field, PO 4 3- was rapidly transferred from the aqueous solution to the electrode surface and can reach deeper adsorption sites. Furthermore, ZLMC-16 demonstrated high selectivity for PO 4 3- in the presence of common interfering ions (SO 4 2- , Cl - , and NO 3 – ) and an efficient adsorption capacity between pH 3–7. In conclusion, our work shows that ZLMC electrodes with fiber additions have good potential for efficient phosphate removal and recovery, which will promote the application of electroassisted adsorption in wastewater treatment.
关键词：
activation energy;crystal growth behavior;La0.8Ca0.2Cr0.2Al0.8O3 nanopowders;sol-gel process
摘要：
The effects of the addition of acetic acid (HAc) and ethanol on the phase structure and crystal growth behavior of the La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders prepared via the sol–gel method were investigated. As a result, the La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders with a stable hexagonal structure were successfully fabricated after heat treatment at 1400°C using a low acetic acid content. The activation energy of crystal growth increased first and then decreased with the increase of HAc or ethanol addition. In comparison, the increment in the quantity of HAc had a more pronounced effect on the activation energy of crystal growth. Correspondingly, the crystallite size of final products was controlled to be 37.14 nm, and the lowest activation energy (22.47 ± 0.46 kJ/mol) for crystal growth of La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 nanopowders was obtained with deionized water as the solvent and the M/HAc molar ratio of 2:1, which was beneficial to the crystallization of La 0.8 Ca 0.2 Cr 0.2 Al 0.8 O 3 grains.
期刊：
Journal of Materials Science,2025年:1-14 ISSN：0022-2461
通讯作者：
Chen, QZ;Chen, Qizhi;Nie, YM
作者机构：
[Yu, Linping; Chen, Qizhi; Wan, Tao; Chen, QZ] Hunan Elect Power Corp Res Inst, Changsha 410036, Peoples R China.;[Nie, Yanmei; Yu, Linping; Chen, Qizhi; Chen, QZ] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Changsha 410114, Peoples R China.;[Wan, Weihua; Yu, Linping; Chen, Qizhi; Chen, QZ] Guangxi Huiyuan Manganese Ind Co Ltd, Laibin 546138, Peoples R China.;[Li, Guangchao] Cent South Univ, Engn Res Ctr, Minist Educ Adv Battery Mat, Changsha 410083, Peoples R China.
通讯机构：
[Nie, YM ; Chen, QZ] C;[Chen, QZ ] H;Hunan Elect Power Corp Res Inst, Changsha 410036, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Changsha 410114, Peoples R China.;Guangxi Huiyuan Manganese Ind Co Ltd, Laibin 546138, Peoples R China.
摘要：
Carbon nanomaterials have generated significant interest across various research fields, with catalytic graphitization emerging as a persistent topic within the carbon family. Graphitic carbon derived from carbon dots exhibits considerable potential for applications in energy storage devices. This study discusses the critical factors influencing the formation of nanosized carbon dots during the catalytic graphitization process, as well as the relationship between the degree of graphitization and lithium-ion storage performance. The results indicate that an increased sintering temperature, reduced particle size, and the incorporation of catalysts are advantageous for enhancing the degree of graphitization. A higher degree of graphitization is associated with a lower irreversible capacity loss for lithium ions, improved plateau capacity, and extended cycling stability at low current densities. This work offers valuable strategies for regulating both the degree of graphitization in nanocarbons and their corresponding lithium-ion storage capacities.
通讯机构：
[Wan, L ; Dai, YM] C;Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Hunan Prov Key Lab Cytochem, Changsha 410114, Peoples R China.
关键词：
Multifunctional sponge;Colored oily wastewater;Temperature response;Oil water separation;Dye adsorption
摘要：
At present, researchers are committed to studying new intelligent response materials to deal with severe water pollution problems. Using PU sponge as the substrate, dopamine was first modified to construct a rough surface while introducing active groups. The monomer N-isopropylacrylamide (NIPAM) and itaconic acid (IA) were grafted and polymerized onto the polydopamine coating on the sponge surface by vinyltrimethoxysilane (VTMS). The obtained DINA-PU sponge has good temperature response and switchable wettability characteristics, and has good adsorption-desorption cycle function. Moreover, a micro-filtration device was designed to separate heavy (light) oil-water mixtures. The separation efficiency can reach more than 95 % and 99 % for heavy and light oil-water, respectively. In addition, the adsorption capacity of the material for methylene blue (MB) can reach 660 mg·g−1. The separation efficiency in the oil-water separation-dye adsorption integrated separation experiment can reach more than 99 %.
At present, researchers are committed to studying new intelligent response materials to deal with severe water pollution problems. Using PU sponge as the substrate, dopamine was first modified to construct a rough surface while introducing active groups. The monomer N-isopropylacrylamide (NIPAM) and itaconic acid (IA) were grafted and polymerized onto the polydopamine coating on the sponge surface by vinyltrimethoxysilane (VTMS). The obtained DINA-PU sponge has good temperature response and switchable wettability characteristics, and has good adsorption-desorption cycle function. Moreover, a micro-filtration device was designed to separate heavy (light) oil-water mixtures. The separation efficiency can reach more than 95 % and 99 % for heavy and light oil-water, respectively. In addition, the adsorption capacity of the material for methylene blue (MB) can reach 660 mg·g−1. The separation efficiency in the oil-water separation-dye adsorption integrated separation experiment can reach more than 99 %.
摘要：
This study investigated anionic guar gum derivatives as dual-purpose inhibitors for methane hydrate formation and metal corrosion in oil and gas pipelines. Sulfonated guar gum (SHG), phosphorylated guar gum (PGG), and guar gum grafted acrylamide (GG-g-PAM) were synthesized and evaluated for their kinetic hydrate inhibition and corrosion inhibition properties. The results demonstrated that all anionic guar gums exhibited superior inhibition effects compared to native guar gum and polyvinylpyrrolidone (PVP), with GG-g-PAM achieving the highest maximum subcooling of 10.47 °C at the concentration of 0.5 wt%. SHG showed the most pronounced effect during the hydrate growth stage, and exhibited the best corrosion inhibition efficiency as well, with a significant inhibition efficiency (>92 %) at 0.5 wt%, surpassing other additives and a commercial imidazoline inhibitor. The formation of a protective film on carbon steel, enhanced by anionic groups, was confirmed through increased contact angles and reduced corrosion rates. Electrochemical impedance spectroscopy (EIS), polarization curves and SEM-EDX spectra further substantiated the effectiveness of the anionic guar gums in preventing carbon steel corrosion in CO 2 -saturated environments. The findings underscore the potential of anionic guar gum, particularly SHG, as a sustainable and effective bio-based additive for simultaneous hydrate inhibition and corrosion protection in oil and gas pipelines.
This study investigated anionic guar gum derivatives as dual-purpose inhibitors for methane hydrate formation and metal corrosion in oil and gas pipelines. Sulfonated guar gum (SHG), phosphorylated guar gum (PGG), and guar gum grafted acrylamide (GG-g-PAM) were synthesized and evaluated for their kinetic hydrate inhibition and corrosion inhibition properties. The results demonstrated that all anionic guar gums exhibited superior inhibition effects compared to native guar gum and polyvinylpyrrolidone (PVP), with GG-g-PAM achieving the highest maximum subcooling of 10.47 °C at the concentration of 0.5 wt%. SHG showed the most pronounced effect during the hydrate growth stage, and exhibited the best corrosion inhibition efficiency as well, with a significant inhibition efficiency (>92 %) at 0.5 wt%, surpassing other additives and a commercial imidazoline inhibitor. The formation of a protective film on carbon steel, enhanced by anionic groups, was confirmed through increased contact angles and reduced corrosion rates. Electrochemical impedance spectroscopy (EIS), polarization curves and SEM-EDX spectra further substantiated the effectiveness of the anionic guar gums in preventing carbon steel corrosion in CO 2 -saturated environments. The findings underscore the potential of anionic guar gum, particularly SHG, as a sustainable and effective bio-based additive for simultaneous hydrate inhibition and corrosion protection in oil and gas pipelines.
