摘要：
The broad occurrence of the hydrazine (N(2)H(4)) residues in aqueousenvironment is a potential threat to human health. Currently, the mainstream strategy for designing N(2)H(4)-specific probes is to functionalize a fluorophore with nucleophilic sites for the reductionreaction with N(2)H(4). In this work, we designed and synthesized an excited-state intermolecular proton transfer (inter-ESPT) fluorescent dye(2-amino-4-(4-methoxyphenyl)-7,8-dihydro-5H-spiro[quinoline-6,2'-[1,3]dioxolane]-3-carbonitrilem, DQN) and used it as a probe to sense N(2)H(4). DQN exhibits blue fluorescence in conventional solvents, which is assigned to its normal emission. In the presence of N(2)H(4), the probe DQN can anchor the N(2)H(4) molecule via hydrogen binding, enabling DQN to undergo inter-ESPT process and light up its tautomeric fluorescence. From this basis, an inter-ESPT-based method for N(2)H(4) detection was established, offering high selectivity and sensitivity (11.5nM). Furthermore, we demonstrated that the probe DQN can recognize the proteins in living cells, affording cell-imaging. This research provides a promising sensing strategy for monitoring N(2)H(4) in water environments and this inter-ESPT dye is a powerful tool for cell-imaging.
通讯机构：
[Wenzhi Huang] S;Science and Technology on Advanced Ceramic Fibers & Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, PR China
作者机构：
[Zhang, Lei] Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia.;[Zhang, Binwei] Chongqing Univ, Inst Adv Interdisciplinary Studies, Ctr Adv Energy Technol & Electrochem, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China.;[Dou, Xiaoyi] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Yan, Wei] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China.;[Yan, Wei] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China.
通讯机构：
[Yan, W ; Dou, XY ] ;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China.
关键词：
battery;energy;LITHIUM
摘要：
As the world becomes more concerned about climate change and the need for clean energy,there is an increasing ...展开更多 As the world becomes more concerned about climate change and the need for clean energy,there is an increasing demand for the development of new battery technologies[1–4].Although lithium-ion batteries(LIBs)are currently the most widely used,they have some limitations such as cost,pollution,and safety concerns[5–8].The lack of suitable electrode materials previously hindered the development of aluminum-ion batteries as a promising alternative energy storage system[9–11].收起
通讯机构：
[Tingting Zhao; Liubin Song] C;College of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, China<&wdkj&>College of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, China
摘要：
The lithium metal anode has attracted much attention from researchers because of its extremely high theoretical capacity and most negative potential, but some problems caused by lithium dendrites grown on the lithium metal anode have seriously hindered its practical application. With the development of computer technology and the improvement of quantum chemical theory, theoretical calculations have become an effective tool to assist in the study of lithium dendrite growth. Firstly, this paper introduces computational simulation methods such as DFT-based first-principles calculations, molecular dynamics, and machine learning. Secondly, strategies to inhibit lithium dendrite formation are summarized for liquid and solid-state batteries, including the construction of stable SEI membranes, electrolyte modification, solid-state electrolyte development, etc. Finally, the research progress and applications of computational simulations for the inhibition of lithium dendrite growth in different battery systems in recent years are summarized.
通讯机构：
[Liu, SL ; Song, YH] H;[Wu, L ] C;Hunan Normal Univ, Dept Hepatobiliary Surg, Affiliated Hosp 1, Changsha 410005, Hunan Province, Peoples R China.;Hunan Normal Univ, Hunan Prov Peoples Hosp, Cent Lab, Affiliated Hosp 1, Changsha 410005, Hunan Province, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Changsha 410114, Hunan, Peoples R China.
关键词：
severe acute pancreatitis;antioxidant stress;Ca;Fe-based nanozymes;treatment;prevention
摘要：
Severe acute pancreatitis (SAP) is a serious inflammatory disease that is often associated with high mortality rate. It tends to trigger a cascade of systemic inflammation that causes damage to multiple organs, such as the lungs and kidneys. Currently, there is no effective treatment plan to reverse the progress of SAP. The occurrence and development of SAP are associated with oxidative stress (OS) and ferroptosis. In this study, the Ca/Fe-based nanozymes are used as multi-enzyme simulants, which can effectively remove the reactive oxygen species and regulate ferroptosis to prevent and treat SAP. Notably, we make two trials for prevention and treatment of SAP. Under the condition of good biocompatibility, the Ca/Fe-based nanozymes effectively reduce the levels of serum pancreatitis-related biomarkers and inflammatory factors which involved in local and systemic inflammatory response. Moreover, the Ca/Fe nanozymes significantly increase the level of ferroptosis regulator of glutathione peroxidase 4 (GPx4) and ferritin heavy chain 1 (FTH1) in pancreas. These results demonstrate that the Ca/Fe-based nanozymes not only alleviate SAP but also mitigate subsequent multi-organ damage, thus providing an effective strategy of Ca/Fe nanozymes for treating SAP-related disorders in clinical research.
作者机构：
[Liu, Xing; Feng, Hao; Li, Junhua; Cui, Ying; Wu, Qian; Wang, Fan] Hengyang Normal Univ, Hunan Prov Univ Key Lab Funct Organometall Mat, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Li, Junhua; Qian, Dong] Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Mang, Changsha 410083, Peoples R China.;[He, Lingzhi] Sch Med, Hunan Polytech Environm & Biol, Hengyang 421008, Peoples R China.;[Tong, Haixia; He, Lingzhi] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Peoples R China.;[Liu, Zeng] Cangzhou Dahua Grp Co Ltd, Cangzhou 061000, Peoples R China.
通讯机构：
[Junhua Li] K;[Dong Qian] H;Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China<&wdkj&>Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hunan Province Universities Key Laboratory of Functional Organometallic Materials, College of Chemistry and Material Science, Hengyang Normal University, Hengyang, 421008, PR China<&wdkj&>Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
关键词：
Prussian blue analogue;Synthesis;Electrochemical sensing;5-Hydroxytryptamine
摘要：
Lack of highly efficient, inexpensive, and easily available catalysts severely limits the practical applicability of electrochemically sensing assay towards 5-hydroxytryptamine (5-HT). Herein, four kinds of Fe-Co bimetallic Prussian blue analogues (FeCo-PBAs) with different molar ratios of Fe to Co were prepared using a simple coprecipitation method. Interestingly, Fe(III) in K3 [Fe(CN)6] can be reduced to Fe(II) by adding trisodium citrate dehydrate, which could offer a new clue to synthesize PBAs with Fe(II) core ions. With the optimizational FeCo-PBA synthesized at a 0.5/1 M ratio of Fe to Co as an electrocatalyst, the constructed sensor shows excellent comprehensive performance for the 5-HT assay with a high sensitivity of 0.856 mu A mu M-1 and an ultralow detection limit of 8.4 nM. Under the optimum conditions, linearity was obtained in the ranges of 0.1-10.0 mu M and 10.0-200.0 mu M and preferable recoveries ranged from 97.8% to 103.0% with relative standard deviation (RSD) < 4.0%. The integrated properties of FeCo-PBA can be comparable to previously reported electrocatalysts for the 5-HT assay including noble metal-based and expensive carbon (graphene and carbon nanotubes)-based electrocatalysts. The proposed sensor also exhibits outstanding selectivity, reproducibility, and practicality for real sample analyses. This work is the first report on the PBA-based sensor for the 5-HT assay, verifying the practicability of this high-performance sensor for the 5-HT assay.
作者机构：
[王玉珑; 戴洋; 魏鑫鑫; 李玉林; 胡可信; 匡奕山] School of Chemistry and Chemical Engineering, Changsha University of Science & Technology, Hu’nan Province, Changsha, 410114, China;[李丹; 史梦华; 刘春景; 董超] Yueyang Forest & Paper Co.，Ltd., Hu’nan Province, Yueyang, 414002, China;[吴学勋] Hunan Refining New Material Technology Co.，Ltd., Hu’nan Province, Changsha, 410221, China
通讯机构：
[Wang, Y.] S;School of Chemistry and Chemical Engineering, Hu’nan Province, China
摘要：
Optimizing the electronic structure lies at the core of promoting the intrinsic activity of electrocatalyst for oxygen evolution reaction (OER). Herein, we incorporated Mo dopants and Ni vacancies into two-dimensional ultrathin NiOOH to boost the OER activity. Experimental results exhibited that the integration of two defects modulate the electronic structure and generate more high-valance Ni species under OER conditions, which greatly enhance the catalytic performance by delivering a high current density of 30 mA cm-2 at a low overpotential of 280 mV. Density functional theory calculations identified the most active center of a surface Ni site that is close to a sublayer Ni vacancy separated by a sublayer Mo dopant, where the optimized electronic structure moves the Gibbs free energy of (& UDelta;GO*) close to the midpoint between & UDelta;GOOH* and & UDelta;GOH*, greatly decreasing the catalytic overpotential and enhancing the catalytic activity. This study emphasizes the importance of exploring the synergy between different defect structures to break the scaling relation for promoted catalytic performance.
摘要：
Multifunctional microencapsulated phase change materials (MePCMs) with sugar alcohols as core and functional polymers as shell are of great importance for the applications of sugar alcohols as phase change materials (PCMs). However, the preparation of such kinds of MePCMs was restricted due to the water solubility and the high phase change temperature of sugar alcohols. Herein, we proposed a facial method and prepared a series of novel multifunctional sugar alcohols @ polyaniline (PANI) MePCMs with m-erythritol (ME) as core, PANI as shell, and exfoliated graphite nanoplatelets (GNPs) as thermal conductive and photothermal conversion enhancement fillers. The prepared MePCMs were composed of GNPs@ME particles microencapsulated by PANI shell when the loading of GNPs was no more than 4 wt%. Otherwise, the GNPs@ME particles would be wrapped by excessive GNPs at first and then microencapsulated by the PANI shell. The prepared MePCMs exhibited good anti-leakage performance. The latent heat storage capacity of the prepared MePCMs could attain 254.3 J center dot g(-1). The thermal conductivity of the MePCMs with 8 wt% GNPs could be greatly enhanced to 196 % higher than that of the MePCMs without GNPs. Meanwhile, due to the synergetic nucleating effect of PANI and GNPs, the supercooling of ME in the MePCM was effectively suppressed from about 100 degrees C to about 56 degrees C with 2 wt% GNPs. The prepared MePCMs also exhibited excellent photothermal conversion performance. Consequently, the results reported here could pave the way for the preparation of sugar alcohol-based multifunctional MePCMs for solar thermal applications and latent heat storage systems.
期刊：
Results in Surfaces and Interfaces,2023年12:100130 ISSN：2666-8459
通讯作者：
Weiguo Mao<&wdkj&>Cuiying Dai
作者机构：
[Xixing Deng; Weiguo Mao; Zhangji Luo; Wenjie Ye; Cuiying Dai] College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China;Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, 410073, China;Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410114, Hunan, China;[Xizhi Fan] College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China<&wdkj&>Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, 410073, China<&wdkj&>Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410114, Hunan, China
通讯机构：
[Weiguo Mao; Cuiying Dai] C;College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China
摘要：
The high-temperature mechanical properties and failure mechanisms of Si, BSAS and Yb2SiO5 ceramic materials are important for environmental barrier coatings. The Si coating, BSAS coating and Yb2SiO5 coating were prepared by the atmospheric plasma spray (APS) technique. The elastic modulus, fracture strength and fracture strain are determined by three-point bending combined with the digital image correlation (DIC) method. The results show that as the test temperature increases from 25 °C to 1000 °C, the elastic modulus of the Si coating and Yb2SiO5 coating decreases while the elastic modulus of the BSAS coating increases. And the fracture strength and fracture strain of the Si coating, BSAS coating and Yb2SiO5 coating increase. The elastic modulus is related to the interatomic distance and bonding strength of atoms. The fracture strength and fracture strain increase with the densification of the coating.
