Solvothermal synthesis and high optical performance of three-dimensional sea-urchin-like TiO2
作者：
Zhou, Yi* ;Wang, Yutang;Li, Mengyao;Li, Xuzhi;Yi, Qin;...
期刊：
Materials Research Bulletin ,2015年66:115-122 ISSN：0025-5408
通讯作者：
Zhou, Yi
作者机构：
[Li, Mengyao; Yi, Qin; Li, Xuzhi; Wang, Yutang; Zhou, Yi; Deng, Pan; Wu, Hongyan] Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Zhou, Yi] C;Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
A. Three-dimensional;B. Solvothermal;C. Parameters;D. The efficiency of power conversion
摘要：
Three-dimensional (3D) sea-urchin-like TiO<inf>2</inf> microspheres were successfully synthesised by solvothermal method. The effects of preparation parameters including reaction temperature, concentration and mass fraction of precursor, and solvent volume on the microstructure of the microspheres were investigated. Results of scanning electron microscopy showed that the preparation parameters played a critical role in the morphology of 3D sea-urchin-like TiO<inf>2</inf>. In addition, when the sea-urchin-like TiO<inf>2</inf> nanostructures were used as the dye-sensitized solar cells (DSSCs) anode, the power-conversion efficiency was higher than that of other morphologies, which was due to the special 3D hierarchical nanostructure, large specific surface area, and enhanced absorption of UV-vis of the TiO<inf>2</inf> nanostructures. ©2015 Elsevier Ltd. All rights reserved.
语种：
英文
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Preparation of mesoporous so4 2- /CeO2 -TiO2 -ZrO2 solid acid catalyst and its application in acetylation of glycerol
作者：
Li Xun* ;Yu Dan;An Xingchen;Fang Wenting
期刊：
JOURNAL OF BIOBASED MATERIALS AND BIOENERGY ,2015年9(1):50-54 ISSN：1556-6560
通讯作者：
Li Xun
作者机构：
[Fang Wenting; Yu Dan; Li Xun; An Xingchen] Changsha Univ Sci & Technol, Coll Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li Xun] C;Changsha Univ Sci & Technol, Coll Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
The 4th International Conference on Biomass Energy Technologies—8th World Bioenergy Symposium (ICBT-WBS 2014) (第四届生物质能源技术国际会议暨第八届国际生物能源会议)
会议时间：
2014-10-17
会议地点：
长沙
会议主办单位：
中国可再生能源学会生物质能专业委员会;生物质能源产业技术创新战略联盟
会议论文集名称：
The 4th International Conference on Biomass Energy Technologies—8th World Bioenergy Symposium (ICBT-WBS 2014) (第四届生物质能源技术国际会议暨第八届国际生物能源会议)论文集
关键词：
Mesoporous Structure;Solid Acid Catalyst;Acetylation of Glycerol
摘要：
Highly ordered mesoporous CeO2-TiO2-ZrO2 was prepared by using Pluronic F127 as the template from the evaporation-induced self assembly (EISA). SO42-/CeO2-TiO2-ZrO2 solid acid catalyst was obtained by immersing CeO2-TiO2-ZrO2 in 0.5 mol/L H2SO4. The prepared catalyst was characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM) and BET surface area. The small-angle XRD and TEM measurements reveal the catalyst possess two-dimensional mesostructure with large-domain regularity. BET surface area measurements show large surface area (160.8 m(2)/g) and pore volume (0.31043 m(3)/g). These meso-structured solid superacid catalyst was used for acetylation of glycerol with acetic acid. The effect of various parameters such as reaction temperature, molar ratio of acetic acid to glycerol, and the amount of catalyst were studied over the SO42-/CeO2-TiO2-ZrO2 catalyst to optimize the reaction conditions.
语种：
英文
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Three-dimensional (3D) sea-urchin-like hierarchical TiO2 microspheres: growth mechanism and highly enhanced photocatalytic activity
作者：
Zhou, Yi* ;Wang, Yutang;Yi, Qin;Li, Mengyao;Li, Xuzhi;...
期刊：
Journal of Materials Science: Materials in Electronics ,2014年25(9):4156-4162 ISSN：0957-4522
通讯作者：
Zhou, Yi
作者机构：
[Li, Mengyao; Yi, Qin; Li, Xuzhi; Wang, Yutang; Huang, Yan; Zhou, Yi; Deng, Pan] Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Zhou, Yi] C;Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
TiO2;Photocatalytic Activity;High Photocatalytic Activity;TiO2 Powder;TiOx
摘要：
Three-dimensional (3D) sea-urchin-like hierarchical TiO<inf>2</inf> microspheres were synthesized by a template-free hydrothermal method. The effects of preparation parameters on the microstructure of 3D sea-urchin-like hierarchical TiO<inf>2</inf> were investigated using scanning electron microscopy (SEM), transmission electron microscopy, X-ray diffractometer, energy-dispersive X-ray spectrometer and Brunauer-Emmett-Teller technologies. The growth mechanism and photocatalytic activity of 3D sea-urchin-like TiO <inf>2</inf> microspheres were discussed. The results of electron microscopy characterizations SEM showed that the microspheres were consisted of numerous one-dimensional (1D) nanorods. A three-step growth model: oxygenated to be 1D nanorods, self-assembly and protonation, was proposed to illustrate the growth mechanism of sea-urchin-like structures. The synthesized 3D sea-urchin-like hierarchical TiO<inf>2</inf> microspheres exhibited a better photocatalytic activity for photodegradation of rhodamine B under sunlight irradiation compared to that of P25, which was attributed to the special 3D hierarchical nanostructure, the increased number of surface active sites and anatase crystal structure. ©2014 Springer Science+Business Media New York.
语种：
英文
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Purification, antioxidant activity and antiglycation of polysaccharides from Polygonum multiflorum Thunb
作者：
Lv, Lishuang* ;Cheng, Yunhui;Zheng, Tiesong;Li, Xiaoming;Zhai, Rong
期刊：
Carbohydrate Polymers ,2014年99:765-773 ISSN：0144-8617
通讯作者：
Lv, Lishuang
作者机构：
[Zheng, Tiesong; Li, Xiaoming; Lv, Lishuang; Zhai, Rong] Nanjing Normal Univ, Ginling Coll, Dept Food Sci & Technol, Nanjing 210097, Jiangsu, Peoples R China.;[Cheng, Yunhui] Changsha Univ Sci & Technol, Dept Biol & Food Engn, Changsha 410015, Hunan, Peoples R China.;[Lv, Lishuang] Nanjing Normal Univ, Ginling Coll, Dept Food Sci & Technol, 122 Ninghai Rd, Nanjing 210097, Jiangsu, Peoples R China.
通讯机构：
[Lv, Lishuang] N;Nanjing Normal Univ, Ginling Coll, Dept Food Sci & Technol, 122 Ninghai Rd, Nanjing 210097, Jiangsu, Peoples R China.
关键词：
Antiglycation;Antioxidant;Polygonum multiflorum Thunb;Polysaccharide
摘要：
Polysaccharides, one of the most important constituents in Polygonum multiflorum Thunb, a famous Chinese medicinal herb, were isolated by DEAE-52, Sepharose 4B and Sephacryl S-300 column chromatography. Two polysaccharides (PMP-1 and PMP-2) were identified as homogeneous in molecular weight with HPLC. The molecular weights were 4.8 × 102 and 6.1 × 10 2 kDa, respectively. Antioxidant activity tests were performed with two polysaccharides at concentrations of 0.1-1.5 mg/mL. The results indicated that the inhibitory activity on oxidation and glycation exhibited a dose-dependent response. PMP-2 exhibited a much stronger antioxidant capacity against free radical, lipid oxidation and protein glycation. The IC50 values of PMP-2 were 0.47, 0.6 and 0.93 mg/mL for superoxide anion scavenging, hydroxyl radical scavenging, and hydroxyl peroxide scavenging, respectively. The inhibitory ability of PMP-2 on lipid oxidation was most markedly in rat liver, followed by heart and kidney. Meanwhile, PMP-2 also showed satisfactory suppression of AGEs formation. This suggested that the polysaccharides present in PM can contribute to the biological effects. © 2013 Elsevier Ltd. All rights reserved.
语种：
英文
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Preparation and Characterization of Mesoporous Solid Acid and Its Application inTertiary Butyl Glycerol Ether Synthesis
作者：
Xun Li;Xingchen An;Wenting Fang;Dan Yu;Xianjun Huang;...
作者机构：
[Xun Li; Xingchen An; Wenting Fang; Dan Yu; Xianjun Huang; Hui Shi] College of Chemical and Biology Engineering,Changsha University Of Science & Technology,Changsha 410004,Hunan,China
会议名称：
The 4th International Conference on Biomass Energy Technologies—8th World Bioenergy Symposium (ICBT-WBS 2014) (第四届生物质能源技术国际会议暨第八届国际生物能源会议)
会议时间：
2014-10-17
会议地点：
长沙
会议主办单位：
中国可再生能源学会生物质能专业委员会;生物质能源产业技术创新战略联盟
会议论文集名称：
The 4th International Conference on Biomass Energy Technologies—8th World Bioenergy Symposium (ICBT-WBS 2014) (第四届生物质能源技术国际会议暨第八届国际生物能源会议)论文集
关键词：
zirconium oxide;Mesoporous solid acid;Glycerol ether;Glycerin
摘要：
This paper we take eight water oxygen zirconium chloride as the source of zirconium and polyethylene glycol 20000 as the template agent to acquire WO3/ZrO2,SO4 2-/ZrO2,MoO3/ZrO2,B2O3/ZrO2 and a series of mesoporous solid super acid by using precipitation,and precipitation-impregnation.According to the tests of SEM,TEM,XRD,BET,it shows that these four kinds of catalysts all have certain morphology and relatively ordered mesoporous structures.WO3/ZrO2,which is among the products,has a specific surface area of 80.1772 m2/g,an aperture of 15.96055 nm and a pore volume of 0.252530 cm3/g.At the meantime,these mesoporous solid acid can be used as catalysts into the study of the synthesis of tert-butyl ether glycerin which is formed by the reaction of glycerin and tert-butyl alcohol under a certain conditions.The results showed that if the conditions of the reaction is at glycerin: chloroform = 1:4,temperature is 85oC load 20%,catalyst dosage is 1.14 g,9 h,we can reach the best reaction selectivity and conversion rate,which are respectively 95%and 45%.
语种：
英文
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A novel group contribution-based method for estimation of flash points of ester compounds
作者：
Dai Yimin* ;Liu Hui;Li Xun;Zhu Zhiping;Zhang Yuefei;...
期刊：
Chemometrics and Intelligent Laboratory Systems ,2014年136:138-146 ISSN：0169-7439
通讯作者：
Dai Yimin
作者机构：
[Zhu Lixuan; Zhou Yue; Liu Hui; Cao Zhong; Li Xun; Zhu Zhiping; Zhang Yuefei; Dai Yimin] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Dai Yimin] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Ester;Flash point;Group contribution-based method;Model validation;Multiple linear regression;Quantitative structure-property relationship
摘要：
Flammability in esters is one of the most important features for preparation, storage, safe processing, handling and shipping of a substance. In this study, a new accurate group contribution-based method was presented for estimation of the flash points of ester compounds. The predicted flash points for a dataset of 80 esters were in good agreement with the experimental values. The obtained results showed the squared correlation coefficient (R2) of 0.9902, root mean square error (RMS) of 5.371K, and average absolute relative deviation (AARD) of 1.22% for the experimental values. To propose a predictive model, 30 ester compounds in testing set were investigated. The average percent error of 1.96% for the predicted flash point of the investigated compounds was found from the corresponding experimental values. The established model was validated and tested through the use of leave-one-out cross validation method, Y-randomization and applicability domain analysis. The results demonstrated the improved accuracy of the presented method with respect to previously proposed methods in open literatures. Therefore, the model can be well used to predict the flash points of a wide range of ester compounds, which is an accurate method for potential application. © 2014 Elsevier B.V.
语种：
英文
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Synthesis of sea urchin-like ZnO by a simple soft template method and its photoelectric properties
作者：
Zhou, Yi* ;Li, Mengyao;Wang, Yutang;Yi, Qin;Li, Xuzhi;...
期刊：
Materials Science in Semiconductor Processing ,2014年27:1050-1056 ISSN：1369-8001
通讯作者：
Zhou, Yi
作者机构：
[Li, Mengyao; Yi, Qin; Li, Xuzhi; Liu, Ce; Wang, Yutang; Zhou, Yi] Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Zhou, Yi] C;Changsha Univ Sci & Technol, Dept Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Photoelectric properties;Sea urchin-like ZnO;Solar energy materials;Template
摘要：
Sea urchin-like zinc oxide (ZnO) micro/nanostructures were fabricated via a simple soft template method. In the single ammonia system, the template was H<inf>2</inf> gas bubbles generated by NaBH<inf>4</inf>. The morphology, crystalline structure, elements and the photoelectric properties of the as-prepared ZnO were characterized and tested by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and photocurrent-voltage measurements. The results demonstrated that the ZnO prepared in 25% ammonia and 48 mmol NaBH<inf>4</inf> at 120 °C for 3 h had pure and the best 3-D sea urchin-like micro/nanostructures and high crystalline with hexagonal structure. Compared to ZnO nanorod arrays, the as-prepared ZnO showed preferable photoelectric properties as the anode of dye-sensitized solar cells (DSSCs), among which the efficiency of power conversion (η) was increased by 51.05%. It can be attributed to the special geometric morphologies. Moreover, a new multistep mechanism was proposed to illustrate how to form such a structure by this simple soft template method, which can provide a theoretical basis for the fabrication of 3-D materials. ©2014 Elsevier Ltd. All rights reserved.
语种：
英文
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Characterization of structural and functional properties of fish protein hydrolysates from surimi processing by-products
作者：
Liu, Yongle;Li, Xianghong* ;Chen, Zhijun;Yu, Jian;Wang, Faxiang;...
期刊：
Food Chemistry ,2014年151:459-465 ISSN：0308-8146
通讯作者：
Li, Xianghong
作者机构：
[Wang, Faxiang; Liu, Yongle; Yu, Jian; Li, Xianghong; Chen, Zhijun; Wang, Jianhui] Changsha Univ Sci Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Li, Xianghong] Changsha Univ Sci Technol, Sch Chem & Biol Engn, 960 South Wanjiali Rd,2nd Sect, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li, Xianghong] C;Changsha Univ Sci Technol, Sch Chem & Biol Engn, 960 South Wanjiali Rd,2nd Sect, Changsha 410004, Hunan, Peoples R China.
关键词：
Degrees of hydrolysis;Fish protein hydrolysate;Functional property;Structure
摘要：
Structural and functional properties of fish protein hydrolysates with different degrees of hydrolysis (DH) from surimi processing by-products, prepared by Protamex and Alcalase, were evaluated. As the DH increased, the zeta potentials of the hydrolysates increased (p > 0.05). The surface hydrophobicity of the hydrolysates was significantly affected by DH (p < 0.05). A wide variety of peptides were obtained after hydrolysis by Protamex and Alcalase. The hydrolysate with DH 10%, prepared by Protamex, contained more large protein molecules than did the others. Hydrolysis by both enzymes increased solubility to more than 65% over a wide pH range (pH 2-10). The interfacial activities of hydrolysates decreased with increasing DH (p < 0.05). The hydrolysate with DH 10%, prepared by Protamex, exhibited the best interfacial properties among all of the samples. Thermal properties were also affected by the hydrolysis. The results reveal that structures and functionalities of the hydrolysates were determined both by DH and enzyme type employed. © 2013 Elsevier Ltd. All rights reserved.
语种：
英文
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Prediction of boiling points of organic compounds by QSPR tools
作者：
Dai Yi-min* ;Zhu Zhi-ping;Cao Zhong;Zhang Yue-fei;Zeng Ju-lan;...
期刊：
Journal of Molecular Graphics and Modelling ,2013年44:113-119 ISSN：1093-3263
通讯作者：
Dai Yi-min
作者机构：
[Cao Zhong; Zhang Yue-fei; Zhu Zhi-ping; Zeng Ju-lan; Dai Yi-min; Li Xun] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Dai Yi-min] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
Equilibrium electro-negativity;Molecular descriptor;Normal boiling point;Organic compound;Quantitative structure-property relationship (QSPR)
摘要：
The novel electro-negativity topological descriptors of YC, WC were derived from molecular structure by equilibrium electro-negativity of atom and relative bond length of molecule. The quantitative structure-property relationships (QSPR) between descriptors of YC, WC as well as path number parameter P3 and the normal boiling points of 80 alkanes, 65 unsaturated hydrocarbons and 70 alcohols were obtained separately. The high-quality prediction models were evidenced by coefficient of determination (R<sup>2</sup>), the standard error (S), average absolute errors (AAE) and predictive parameters (Q <inf>ext</inf><sup>2</sup>, R<sup>2</sup><inf>V</inf>, R<sup>2</sup> <inf>m</inf>). According to the regression equations, the influences of the length of carbon backbone, the size, the degree of branching of a molecule and the role of functional groups on the normal boiling point were analyzed. Comparison results with reference models demonstrated that novel topological descriptors based on the equilibrium electro-negativity of atom and the relative bond length were useful molecular descriptors for predicting the normal boiling points of organic compounds. ©2013 Elsevier Ltd. All rights reserved.
语种：
英文
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专业认证背景下化工原理实验工程素质的培养
作者：
戴益民;李浔;张跃飞;黄灵芝;申雄军;...
期刊：
化工高等教育 ,2013年30(4):39-41 ISSN：1000-6168
作者机构：
长沙理工大学化学与生物工程学院,湖南长沙,410004
关键词：
化工原理实验;工程素质;专业认证;教学改革
摘要：
本文以专业认证为导向,系统地介绍了化工原理实验教学过程中将工程观念贯穿于实验教学的各个环节中的改革举措。结果表明,化工原理实验过程中的改革措施能有效培养学生工程思维和工程意识,提高学生的综合能力和创新精神。
语种：
中文
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Application of graphene oxide to the construction of electrochemical biosensor for environmental monitoring
作者：
Li, Dan;Tong, Haixia;Li, Xin;An, Zhenyu;Li, Wenqi;...
期刊：
TMS Annual Meeting ,2013年:25-32
通讯作者：
Li, D.(ld1004@126.com)
作者机构：
[Li, Dan; Li, Wenqi; Zhang, Xiaofeng; Li, Xin; An, Zhenyu; Liu, Wei; Tong, Haixia; Wang, Qian] College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China
通讯机构：
College of Chemistry and Biological Engineering, Changsha University of Science and Technology, China
会议名称：
142nd Annual Meeting and Exhibition: Linking Science and Technology for Global Solutions, TMS 2013
会议时间：
March 3, 2013 - March 7, 2013
会议地点：
San Antonio, TX, United states
会议主办单位：
(1) College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China
关键词：
DNA;Electrochemical biosensor;Graphene oxide;Hydroquinone
摘要：
As a two-dimensional carbon material, graphene possesses unique physicochemical properties, which has provided useful applications to the development of electrochemical sensors. In the present work, we used graphene oxide as the electrode material, on which double-stranded DNA was effectively immobilized. The electrochemical experimental results indicated that the electrochemical response of DNA on the electrode was dramatically increased by graphene oxide which facilitates the electron transfer between DNA and electrode. While hydroquinone, a typical environmental pollutant, was present in the electrolytic solution, the electrochemical response of DNA on the graphene oxide electrode was decreased, owing to the interaction of hydroquinone with DNA. Accordingly, the DNA-immobilized graphene oxide electrode was developed as the electrochemical biosensor for the monitoring of hydroquinone. Under optimal condition, the as-prepared electrochemical biosensor showed a linear response to hydroquinone in the concentration range from 1.0×10-7 to 1.0×10-4 mol/L. The proposed electrochemical biosensor is promising for environmental monitoring.
语种：
英文
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Thermal behaviors study of LiFePO4 cell by electrochemical-calorimetric method
作者：
Song, Liubin;Li, Xinhai* ;Wang, Zhixing;Guo, Huajun;Xiao, Zhongliang;...
期刊：
Electrochimica Acta ,2013年90:461-467 ISSN：0013-4686
通讯作者：
Li, Xinhai
作者机构：
[Guo, Huajun; Wang, Zhixing; Song, Liubin; Li, Xinhai] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Peng, Sanjun; Xiao, Zhongliang; Song, Liubin; Zhang, Feng] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li, Xinhai] C;Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Lithium-ion cell;LiFePO_4;Heat flow;Calorimetry;The amount of heat
摘要：
Measurement and analysis of the heat effects by electrochemical calorimetry play an important role in lithium-ion cell safety. In order to disclose thermal behaviors of LiFePO4 used in lithium-ion cell, an eight-channel micro-calorimeter combined with battery test system were employed in this study. The results show that the specific capacity and the amount of heat were strongly affected by operating temperature and charge-discharge rate. The specific capacity and the amount of heat are linear with the current and temperature. With the increase of current and temperature, the specific capacity decreased and the amount of heat increased. At low rate (0.1 C, 0.2 C), the cell has a smaller polarization and a better reversibility, both reversible and irreversible heat contribute to the overall heat production, while irreversible heat dominates the overall heat production when the cell cycles at high rate (0.5 C, 1.0 C). From the comparison of thermal behavior at target temperature (30 degrees C, 40 degrees C, 50 degrees C), a pronounced exothermic thermal behavior was observed during charge-discharge process in the high current region (0.5 C, 1.0 C) at elevated temperature. These suggest that appropriate current and temperature for battery should be choose in order to avoid safety problem, which initiated by internal heat accumulation of battery, and experimental thermo-electrochemical data for LiFePO4 cell should be included in thermal modeling. (C) 2012 Elsevier Ltd. All rights reserved.
语种：
英文
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双孔TiO_2-Al_2O_3复合物氧化物的制备及表征
作者：
黄玉娟;李浔;张丽敏;张跃飞;戴益民
期刊：
应用化工 ,2013年42(5): 870-872,880 ISSN：1671-3206
作者机构：
[黄玉娟; 李浔; 张丽敏; 张跃飞; 戴益民] 长沙理工大学化学与生物工程学院
关键词：
氧化钛;氧化铝;复合氧化物;介孔;大孔
摘要：
分别用溶剂蒸发诱导自组装(EISA)方法及溶胶-凝胶法制备了具有大孔/介孔结构的Al_2O_3-TiO_2复合氧化物材料。X射线粉末衍射(XRD)分析结果表明,复合物中TiO_2与Al_2O_3的相互作用改变了晶型的转变温度,提升了TiO_2的晶型转变温度,从而提高了其热稳定性。扫描电子显微镜(SEM)分析结果表明,EISA方法合成的材料具有更利于活性成分负载的三维连续大孔结构。
语种：
中文
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Response surface optimization and characteristics of Indica rice starch-based fat substitute prepared by α-amylase
作者：
Yi, Cuiping* ;Li, Xianghong;Sun, Peiran;He, Yinghe
期刊：
STARCH-STARKE ,2012年64(6):503-509 ISSN：0038-9056
通讯作者：
Yi, Cuiping
作者机构：
[Sun, Peiran; Li, Xianghong; He, Yinghe; Yi, Cuiping] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Yi, Cuiping] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, 960,2nd Wanjiali So Rd, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Yi, Cuiping] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, 960,2nd Wanjiali So Rd, Changsha 410004, Hunan, Peoples R China.
关键词：
Fat substitute;Hydrolysis by α-amylase;Indica rice starch;Response surface methodology
摘要：
Response surface methodology (RSM) was used to study the effect of enzyme to substrate ratio (11.8-23.6 U α-amylase/g rice starch), hydrolysis temperature (90-100°C) and pH value (6.0-6.6) on the gel strength of rice starches-based fat substitute using α-amylase hydrolysis. The optimum conditions obtained from response surface analysis was 16.52 U/g enzyme dosage, 92°C hydrolysis temperature while the influence of pH was found insignificant in the range tested. Under these optimum conditions, the gel strength of this fat substitute was 113 g/cm<sup>2</sup>, very close to the gel strength of butter of 114 g/cm<sup>2</sup>, while the solubility of the substitute was 1.33 ±0.01% and the swelling power 4.85 ±0.02. There were no observable differences in the granular size distribution between the untreated rice starch and the hydrolyzed rice starch. Rheological properties of this rice starch-based fat substitute implied that it is easier for the substitute to form three-dimensional networks under 34°C. Copyright ©2012 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim.
语种：
英文
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基于创新与实践能力培养的化工原理实验研究性教学模式的探索与实践
作者：
戴益民;李浔;张跃飞
期刊：
化工高等教育 ,2012年29(6):31-34 ISSN：1000-6168
作者机构：
长沙理工大学电力与交通材料保护湖南省重点实验室化学与生物工程学院,湖南长沙,410004;[李浔; 张跃飞; 戴益民] 长沙理工大学
关键词：
化工原理实验;研究性教学;工程观点;创新能力;教学改革
摘要：
化工原理实验教学对培养学生的工程观念和科研能力具有重要作用。本文结合我校实际系统地介绍了化工原理实验在教学课程体系、教学方法和手段、考核方式等方面的改革举措。实践表明系列改革措施能够有效培养学生工程实践能力、创新能力以及团队协作精神。
语种：
中文
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三组分铜铬催化剂催化甘油制备羟基丙酮的研究
作者：
谢丹;李浔;龙立平;肖谷清;林立
期刊：
广州化工 ,2012年40(12):93-95,126 ISSN：1001-9677
作者机构：
湖南城市学院化学与环境学院,湖南益阳,413000;长沙理工大学化学与生物工程学院,湖南长沙,410076;[李浔] 长沙理工大学;[谢丹; 龙立平; 林立; 肖谷清] 湖南城市学院
关键词：
生物质甘油;Cu-Cr-Zn催化剂;羟基丙酮
摘要：
用共沉淀法制备了Cu-Cr-Zn催化剂,考察了Cu/Cr/Zn比、沉淀温度、沉淀时pH值、煅烧温度等制备条件对甘油制备羟基丙酮的影响,并对催化剂进行了表征。结果表明：共沉淀法制备Cu-Cr-Zn催化剂具有较高的催化活性,而且其稳定性和再生能力较好,适宜催化剂制备条件为：Cu/Cr/Zn比为1∶1∶0.5,沉淀温度为70℃,沉淀时pH值为8.0,煅烧温度为400℃,羟基丙酮的选择性可达到90.2%。
语种：
中文
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新型拓扑指数和神经网络研究咪唑啉衍生物的缓蚀性能
作者：
戴益民;刘又年;朱志平;李浔;曹忠;...
期刊：
石油学报(石油加工) ,2012年28(1):115-121 ISSN：1001-8719
通讯作者：
Dai, Y.(yimindai@163.com)
作者机构：
[戴益民; 刘又年] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;[戴益民; 李浔; 曹忠; 朱志平; 杨道武] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410004, China
通讯机构：
School of Chemistry and Chemical Engineering, Central South University, China
关键词：
电性连接性指数;咪唑啉衍生物;缓蚀剂;缓蚀效率(CIE);人工神经网络
摘要：
基于分子图论提出了一种用于表征咪唑啉衍生物分子局部化学微环境及原子杂化状态的新颖结构描述子,即电性连接性指数0Kv、1 Kv和咪唑啉环非氢原子平衡总电荷分数MCI,用于研究15种咪唑啉类缓蚀剂抗CO_2、H_2S腐蚀性能的定量构效关系。结果表明,模型计算值、留一法交互检验预测值的复相关系数分别为0.9764、0.9546,所建模型具有良好的稳定性和外部预测能力;同多元回归方法比较,运用人工神经网络法的复相关系数为0.9848,结果更精确;增加咪唑啉环上取代基长度、减小分子的支化度和降低咪唑环非氢原子平衡总电荷分数能显著提高咪唑啉缓蚀剂的缓蚀效率。
语种：
中文
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化工原理课程设计教学改革与创新教育研究
作者：
张跃飞;戴益民;李浔
期刊：
广东化工 ,2012年39(17):147-148 ISSN：1007-1865
作者机构：
长沙理工大学化学与生物工程学院,湖南长沙,410114
关键词：
化工原理;课程设计;改革;创新
摘要：
化工原理课程设计是以化工单元操作为主的一次工程设计，是化工类学生进行的第一次化工设计的基本训练，它对于培养学生独立工作能力和创新能力、深化与升华学生所学的知识和检验学生综合素质与工程实践能力起着非常重要的作用。因此，如何提高化工原理课程设计质量，培养学生的工程意识和工程设讨能力，对提高学生的实践能力和创新思维有着重要的意义。
语种：
中文
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Thermo-Electrochemical Study on the Heat Effects of LiFePO4 Lithium-ion Battery During Charge-Discharge Process
作者：
Song, Liubin* ;Li, Xinhai;Wang, Zhixing;Xiong, Xunhui;Xiao, Zhongliang;...
期刊：
International Journal of Electrochemical Science ,2012年7(8):6571-6579 ISSN：1452-3981
通讯作者：
Song, Liubin
作者机构：
[Wang, Zhixing; Xiong, Xunhui; Song, Liubin; Li, Xinhai] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Xiao, Zhongliang; Song, Liubin; Zhang, Feng] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Song, Liubin] C;Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Electrochemical Calorimetry;Heat Effect;Lifepo4;Lithium-ion Battery;Thermo Electrochemistry
摘要：
The heat effects of lithium-ion battery cathode could substantially affect the safety and attenuate lifetime of lithium-ion battery. In order to disclose the thermo-electrochemical behaviors of LiFePO4 battery during charge-discharge process at various rates at 30°, electrochemical-calorimetric measurements were employed in this study. The results showed that LiFePO 4 battery had a smaller polarization and a better reversibility at low rate (0.1C, 0.2C, 0.5C). With the increasing of the rate structure of cathode material LiFePO 4 was partially destroyed and impurities, like Li 3PO 4 and FeP 2, appeared at rate 1.0C and 2.0C. Formation of these impurities resulted in electrochemical performance deterioration of battery. The charge-discharge process of LiFePO 4 battery accompanied exothermic process and endothermic process at low rate (0.1C, 0.2C). When the rate increased to 1.0C, only exothermic phenomena existed. With the rate increasing heat production rate and the enthalpy change during charge-discharge process of LiFePO 4 battery increased. These suggest that appropriate rate for battery should be choose in order to avoid safety problem, which initiated by internal heat accumulation of battery. © 2012 by ESG.
语种：
英文
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Estimation of surface tension of organic compounds using quantitative structure-property relationship
作者：
Dai Yi-min;Liu You-nian* ;Li Xun;Cao Zhong;Zhu Zhi-ping;...
期刊：
中南大学学报(英文版) ,2012年19(1):93-100 ISSN：2095-2899
通讯作者：
Liu You-nian
作者机构：
[Liu You-nian; Dai Yi-min] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Cao Zhong; Zhu Zhi-ping; Dai Yi-min; Li Xun; Yang Dao-wu] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Cao Zhong; Zhu Zhi-ping; Dai Yi-min; Li Xun; Yang Dao-wu] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Liu You-nian] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词：
surface tension;quantitative structure-property relationship (QSPR);topological indice;organic compound
摘要：
A novel quantitative structure-property relationship (QSPR) model for estimating the solution surface tension of 92 organic compounds at 20 °C was developed based on newly introduced atom-type topological indices. The data set contained non-polar and polar liquids, and saturated and unsaturated compounds. The regression analysis shows that excellent result is obtained with multiple linear regression. The predictive power of the proposed model was discussed using the leave-one-out (LOO) cross-validated (CV) method. The correlation coefficient (R) and the leave-one-out cross-validation correlation coefficient (R <inf>CV</inf>) of multiple linear regression model are 0.991 4 and 0.991 3, respectively. The new model gives the average absolute relative deviation of 1.81% for 92 substances. The result demonstrates that novel topological indices based on the equilibrium electro-negativity of atom and the relative bond length are useful model parameters for QSPR analysis of compounds. ©2012 Central South University Press and Springer-Verlag Berlin Heidelberg.
语种：
英文
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