作者： Xiao, Zhubing;Yang, Zhi*;Wang, Lu;Nie, Huagui;Zhong, Mei'e;Lai, Qianqian;Xu, Xiangju;Zhang, Lijie;Huang, Shaoming

期刊： Advanced Materials,2015年27(18):2891-2898 ISSN：0935-9648

通讯作者： Yang, Zhi

作者机构： [Nie, Huagui; Xu, Xiangju; Xiao, Zhubing; Lai, Qianqian; Huang, Shaoming; Wang, Lu; Zhang, Lijie; Yang, Zhi] Wenzhou Univ, Nanomat & Chem Key Lab, Wenzhou 325027, Peoples R China.;[Zhong, Mei'e] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Yang, Zhi] Wenzhou Univ, Nanomat & Chem Key Lab, Wenzhou 325027, Peoples R China.

关键词： TiO2;graphene;lithium-sulfur batteries;polysulfides

摘要： An integrated, selective interlayer structure is developed to further mitigate the diffusion of polysulfides, simply by coating the surface of a C-S cathode with a graphene/TiO<inf>2</inf>film. It is found that the application of the graphene/TiO<inf>2</inf>film as an interlayer enables the porous carbon nanotubes-S cathode to exhibit a high reversible specific capacity and extraordinarily excellent cycling stability. ©2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

语种： 英文

作者： Wang, Faxing;Wu, Xiongwei;Yuan, Xinhai;Liu, Zaichun;Zhang, Yi;Fu, Lijun*;Zhu, Yusong;Zhou, Qingming*;Wu, Yuping*;Huang, Wei

期刊： Chemical Society Reviews,2017年46(22):6816-6854 ISSN：1460-4744

通讯作者： Fu, Lijun;Wu, Yuping;Zhou, Qingming

作者机构： [Fu, Lijun; Wu, Yuping; Yuan, Xinhai; Liu, Zaichun; Wu, Xiongwei; Wang, Faxing; Huang, Wei; Zhu, Yusong; Zhang, Yi] Nanjing Tech Univ, Sch Energy Sci & Engn, Nanjing 211816, Jiangsu, Peoples R China.;[Fu, Lijun; Wu, Yuping; Yuan, Xinhai; Liu, Zaichun; Wu, Xiongwei; Wang, Faxing; Huang, Wei; Zhu, Yusong; Zhang, Yi] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China.;[Wang, Faxing; Wu, Yuping] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China.;[Wang, Faxing; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Wang, Faxing] Tech Univ Dresden, Dept Chem & Food Chem, D-01062 Dresden, Germany.

通讯机构： [Fu, LJ; Wu, YP] Nanjing Tech Univ, Sch Energy Sci & Engn, Nanjing 211816, Jiangsu, Peoples R China.;[Fu, LJ; Wu, YP] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China.;[Wu, Yuping] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China.;[Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Zhou, Qingming] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

摘要： Notably, many significant breakthroughs for a new generation of supercapacitors have been reported in recent years, related to theoretical understanding, material synthesis and device designs. Herein, we summarize the state-of-the-art progress toward mechanisms, new materials, and novel device designs for supercapacitors. Firstly, fundamental understanding of the mechanism is mainly focused on the relationship between the structural properties of electrode materials and their electrochemical performances based on some in situ characterization techniques and simulations. Secondly, some emerging electrode materials are discussed, including metal-organic frameworks (MOFs), covalent organic frameworks (COFs), MXenes, metal nitrides, black phosphorus, LaMnO 3 , and RbAg 4 I 5 /graphite. Thirdly, the device innovations for the next generation of supercapacitors are provided successively, mainly emphasizing flow supercapacitors, alternating current (AC) line-filtering supercapacitors, redox electrolyte enhanced supercapacitors, metal ion hybrid supercapacitors, micro-supercapacitors (fiber, plane and three-dimensional) and multifunctional supercapacitors including electrochromic supercapacitors, self-healing supercapacitors, piezoelectric supercapacitors, shape-memory supercapacitors, thermal self-protective supercapacitors, thermal self-charging supercapacitors, and photo self-charging supercapacitors. Finally, the future developments and key technical challenges are highlighted regarding further research in this thriving field. © 2017 The Royal Society of Chemistry.

语种： 英文

作者： Zhang, Wenjie;Zhou, Chunjiao*;Zhou, Weichang;Lei, Aihua;Zhang, Qinglin;Wan, Qiang;Zou, Bingsuo

期刊： Bulletin of Environmental Contamination and Toxicology,2011年87(1):86-90 ISSN：0007-4861

通讯作者： Zhou, Chunjiao

作者机构： [Zhang, Qinglin; Wan, Qiang; Lei, Aihua; Zhang, Wenjie; Zhou, Weichang] Hunan Univ, Sch Chem & Chem Engn, Micronano Ctr, Changsha 410082, Hunan, Peoples R China.;[Zhou, Chunjiao] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Zou, Bingsuo] Beijing Inst Technol, Micronano Technol Ctr, Sch MSE, Beijing 100081, Peoples R China.

通讯机构： [Zhou, Chunjiao] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

关键词： Adsorption;Electrostatic attraction;Graphene oxide;Langmuir model;Methylene blue

摘要： The quite efficient adsorption of methylene blue dye from an aqueous solution by graphene oxide was studied. The favorable electrostatic attraction is the main interaction between methylene blue and graphene oxide. As graphene oxide has the special nanostructural properties and negatively charged surface, the positively charged methylene blue molecules can be easily adsorbed on it. In the aqueous solution of methylene blue at 293 K, the adsorption data could be fitted by the Langmuir equation with a maximum adsorption amount of 1.939 mg/mg and a Langmuir adsorption equilibrium constant of 18.486 mL/mg. The adsorption amount increased with the increase of the solution pH (3-11), was not affected significantly by KCl under the examined condition and the adsorption process was exothermic in nature. The fast and considerable adsorption of graphene oxide could be regarded as a potential adsorbent for cationic dye removal in wastewater treatment process. ©2011 Springer Science+Business Media, LLC.

语种： 英文

作者： Zuo, Tong-Tong;Wu, Xiong-Wei*;Yang, Chun-Peng;Yin, Ya-Xia;Ye, Huan;Li, Nian-Wu;Guo, Yu-Guo*

期刊： Advanced Materials,2017年29(29):- ISSN：0935-9648

通讯作者： Guo, Yu-Guo;Wu, Xiong-Wei

作者机构： [Zuo, Tong-Tong; Ye, Huan; Li, Nian-Wu; Yin, Ya-Xia; Yang, Chun-Peng; Guo, Yu-Guo] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China.;[Wu, Xiong-Wei] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Zuo, Tong-Tong; Ye, Huan; Yin, Ya-Xia; Guo, Yu-Guo] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China.

通讯机构： [Guo, Yu-Guo] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China.;[Wu, Xiong-Wei] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Guo, Yu-Guo] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China.

关键词： 3D current collectors;graphitized carbon fibers;high areal capacity;lithium anodes

摘要： The Li metal anode has long been considered as one of the most ideal anodes due to its high energy density. However, safety concerns, low efficiency, and huge volume change are severe hurdles to the practical application of Li metal anodes, especially in the case of high areal capacity. Here it is shown that that graphitized carbon fibers (GCF) electrode can serve as a multifunctional 3D current collector to enhance the Li storage capacity. The GCF electrode can store a huge amount of Li via intercalation and electrodeposition reactions. The as-obtained anode can deliver an areal capacity as high as 8 mA h cm(-2) and exhibits no obvious dendritic formation. In addition, the enlarged surface area and porous framework of the GCF electrode result in lower local current density and mitigate high volume change during cycling. Thus, the Li composite anode displays low voltage hysteresis, high plating/stripping efficiency, and long lifespan. The multifunctional 3D current collector promisingly provides a new strategy for promoting the cycling lifespan of high areal capacity Li anodes.

语种： 英文

作者： Zhang, Baihe;Liu, Yu;Wu, Xiongwei;Yang, Yaqiong;Chang, Zheng;Wen, Zubiao*;Wu, Yuping

期刊： Chemical communications (Cambridge, England),2014年50(10):1209-1211 ISSN：1359-7345

通讯作者： Wen, Zubiao

作者机构： [Yang, Yaqiong; Liu, Yu; Zhang, Baihe; Chang, Zheng; Wu, Yuping] Fudan Univ, New Energy & Mat Lab, Dept Chem, Shanghai 200433, Peoples R China.;[Yang, Yaqiong; Liu, Yu; Zhang, Baihe; Chang, Zheng; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Liu, Yu; Zhang, Baihe; Wen, Zubiao] Jiangxi Normal Univ, Coll Chem & Chem Engineer, Nanchang 330022, Peoples R China.;[Wu, Xiongwei; Wu, Yuping] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Wen, Zubiao] Jiangxi Normal Univ, Coll Chem & Chem Engineer, Nanchang 330022, Peoples R China.

摘要： An aqueous rechargeable battery system is assembled by using metallic zinc and Na0.95MnO2 as the negative and positive electrodes, respectively. It is cheap and environmentally friendly, and its energy density is 78 Wh kg-1. Its cycling performance is very good with only 8% capacity loss after 1000 cycles at 4 C between 1 and 2 V. © 2014 The Royal Society of Chemistry.

语种： 英文

作者： Wang, Faxing;Wu, Xiongwei;Li, Chunyang;Zhu, Yusong*;Fu, Lijun*;Wu, Yuping*;Liu, Xiang

期刊： Energy and Environmental Science,2016年9(12):3570-3611 ISSN：1754-5692

通讯作者： Zhu, Yusong;Fu, Lijun;Wu, Yuping

作者机构： [Zhu, YS; Fu, Lijun; Wu, Yuping; Liu, Xiang; Wang, Faxing; Zhu, Yusong; Li, Chunyang] Nanjing Tech Univ, Coll Energy, Nanjing 211816, Jiangsu, Peoples R China.;[Zhu, YS; Fu, Lijun; Wu, Yuping; Liu, Xiang; Wang, Faxing; Zhu, Yusong; Li, Chunyang] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China.;[Wu, Xiongwei; Wu, Yuping] Hunan Agr Univ, Coll Sci, Changsha, Hunan, Peoples R China.;[Wu, Yuping] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China.;[Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.

通讯机构： [Zhu, YS; Fu, LJ; Wu, YP] Nanjing Tech Univ, Coll Energy, Nanjing 211816, Jiangsu, Peoples R China.;[Zhu, YS; Fu, LJ; Wu, YP] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China.;[Wu, Yuping] Hunan Agr Univ, Coll Sci, Changsha, Hunan, Peoples R China.;[Wu, Yuping] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China.;[Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.

摘要： Nanotechnology has opened up new frontiers in materials science and engineering in the past several decades. Considerable efforts on nanostructured electrode materials have been made in recent years to fulfill the future requirements of electrochemical energy storage. Compared to bulk materials, most of these nanostructured electrode materials improve the thermodynamic and kinetic properties of electrochemical reactions for achieving high energy and power densities. Here we briefly review the state-of-the-art research activities in the area of nanostructured positive electrode materials for post-lithium ion batteries, including Li-S batteries, Li-Se batteries, aqueous rechargeable lithium batteries, Li-O<inf>2</inf>batteries, Na-ion batteries, Mg-ion batteries and Al-ion batteries. These future rechargeable battery systems may offer increased energy densities, reduced cost, and more environmental benignity. A particular focus is directed to the design principles of these nanostructured positive electrode materials and how nanostructuring influences electrochemical performance. Moreover, the recent achievements in nanostructured positive electrode materials for some of the latest emerging rechargeable batteries are also summarized, such as Zn-ion batteries, F- and Cl-ion batteries, Na-, K- and Al-S batteries, Na- and K-O<inf>2</inf>batteries, Li-CO<inf>2</inf>batteries, novel Zn-air batteries, and hybrid redox flow batteries. To facilitate further research and development, some future research trends and directions are finally discussed. &copy;The Royal Society of Chemistry 2016.

语种： 英文

作者： Zhang, Xian;Zhang, Panyue*;Wu, Zhen;Zhang, Ling;Zeng, Guangming;Zhou, Chunjiao

期刊： Colloids and Surfaces A: Physicochemical and Engineering Aspects,2013年435:85-90 ISSN：0927-7757

通讯作者： Zhang, Panyue

作者机构： [Zhang, Xian] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Zhang, Panyue; Wu, Zhen] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhang, Ling] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Zhou, Chunjiao] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Zhang, Panyue] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

通讯机构： [Zhang, Panyue] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

会议名称： 7th International Conference on Interfaces Against Pollution (IAP)

会议时间： JUN 11-14, 2012

会议地点： Nancy, FRANCE

会议主办单位： [Zhang, Xian] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.^[Zhang, Panyue;Wu, Zhen;Zeng, Guangming] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.^[Zhang, Ling] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.^[Zhou, Chunjiao] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

关键词： Humic acid;Fe3O4 nanoparticles;Adsorption;Methylene blue;Desorption

摘要： Humic acid-coated Fe3O4 (HA-Fe3O4) nanoparticles as magnetic adsorbents were prepared with co-precipitation of humic acids and Fe3O4 nanoparticles. TEM analysis indicated that the average diameter of the spherical HA-Fe3O4 core was about 15 nm. TGA characterization showed that the HA-Fe3O4 nanoparticles contained about 50% (w/w) HA. The characteristic absorption of HA at 1604/cm and 1701/cm was observed in the FIRT spectra of HA-Fe3O4 nanoparticles. The HA-Fe3O4 nanoparticles exhibited a typical superparamagnetic characteristic with a saturation magnetization of 77 emu/g, which resulted in an easy solid–liquid separation with an external magnet. The HA-Fe3O4 nanoparticles were applied for methylene blue (MB) adsorption and results showed that the HA-Fe3O4 nanoparticles possessed much higher adsorbed amount of MB than the bare Fe3O4 nanoparticles and HA powders. The HA-Fe3O4 nanoparticles remained stable in a broad pH range of 3–11. The adsorption kinetics can be described by a pseudo-second-order equation, and the time when 50% of the MB was adsorbed (t1/2) was 7 min. The adsorption isotherm of the HA-Fe3O4 nanoparticles agreed well with Langmuir adsorption equation, and the maximum adsorbed amount of MB was 0.291 mmol/g. Desorption of the saturated HA-Fe3O4 nanoparticles was easily carried out with a mixture of methanol and acetic acid with a volume ratio of 9:1.

语种： 英文

作者： Liu, Lili;Hou, Yuyang;Wu, Xiongwei;Xiao, Shiying;Chang, Zheng;Yang, Yaqiong;Wu, Yuping*

期刊： Chemical communications (Cambridge, England),2013年49(98):11515-11517 ISSN：1359-7345

通讯作者： Wu, Yuping

作者机构： [Yang, Yaqiong; Xiao, Shiying; Liu, Lili; Chang, Zheng; Hou, Yuyang; Wu, Yuping] Fudan Univ, NEML, Dept Chem, Shanghai 200433, Peoples R China.;[Yang, Yaqiong; Xiao, Shiying; Liu, Lili; Chang, Zheng; Hou, Yuyang; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Wu, Xiongwei] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Wu, Yuping] Fudan Univ, NEML, Dept Chem, Shanghai 200433, Peoples R China.

摘要： Nanoporous selenium was prepared by a simple mechanical method adopting nano-CaCO3 as a template. When used as a cathode, it can exhibit relatively high capacity and good cycling behaviour. These results present great promise for this new cathode material for rechargeable lithium batteries of high energy density. © 2013 The Royal Society of Chemistry.

语种： 英文

作者： Zhou, Zhi;Zhou, Nan*;Xia, Mao;Yokoyama, Meiso;Hintzen, H. T. (Bert)

期刊： Journal of Materials Chemistry C,2016年4(39):9143-9161 ISSN：2050-7526

通讯作者： Zhou, Nan

作者机构： [Xia, Mao; Zhou, Zhi; Zhou, Nan] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Yokoyama, Meiso] I Shou Univ, Dept Elect Engn, Kaohsing City 84001, Peoples R China.;[Hintzen, H. T. (Bert)] Delft Univ Technol, Fac Sci Appl, Grp Luminescent Mat, Sect Fundamental Aspects Mat & Energy, NL-2600 AA Delft, Netherlands.

通讯机构： [Zhou, Nan] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

摘要： Phosphor converted white light-emitting diodes (pc-WLEDs) are an alternative choice for general lighting due to their superior features such as high efficiency, durability and reliability. However, most pc-WLEDs in the market suffer from problems resulting from the lack of red emission, which can be resolved by adding red-emitting phosphors. The currently dominant red-emitting phosphors are Eu²⁺-doped nitrides, but the requirement of elevated temperature during synthesis makes them costly, and moreover the over broad emission may result in loss of lumen efficiency. Recently, transition metal Mn⁴⁺doped materials showing very narrow red emission have attracted tremendous interest for compositions based on abundant resources and mild production processes, resulting in a highly efficient way to obtain phosphors with favorable luminescence properties. In this work, we describe the recent progress on transition metal Mn⁴⁺-doped inorganic luminescent materials, including oxides (subdivision into alkaline-earth germanates, arsenates, aluminates, titanates, pyrosilicates, phosphates, zirconates, gallates, simple oxides and others), fluorides and nitrides. More specifically, the review focuses on Mn⁴⁺activated red-emitting phosphors that can be effectively excited by NUV and blue LED chips. The excitation and emission spectra as well as the preparation process of some representative phosphors are given and discussed. Meanwhile, the merits and drawbacks of several kinds of matrix materials in applications for white LEDs, as well as some problems, development trends and application prospects in this field of Mn⁴⁺doped phosphors are summarized. &copy;2016 The Royal Society of Chemistry.

语种： 英文

作者： Wang, Faxing;Wang, Xiaowei;Chang, Zheng;Wu, Xiongwei;Liu, Xiang;Fu, Lijun*;Zhu, Yusong;Wu, Yuping;Huang, Wei

期刊： Advanced Materials,2015年27(43):6962-6968 ISSN：0935-9648

通讯作者： Fu, Lijun

作者机构： [Liu, Xiang; Wang, Faxing; Huang, Wei; Zhu, Yusong; Wu, Yuping; Fu, Lijun] Nanjing Tech Univ, Coll Energy, Nanjing 211816, Jiangsu, Peoples R China.;[Liu, Xiang; Wang, Faxing; Huang, Wei; Zhu, Yusong; Wu, Yuping; Fu, Lijun] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China.;[Wang, Faxing; Wang, Xiaowei; Chang, Zheng; Wu, Yuping] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China.;[Wang, Faxing; Wang, Xiaowei; Chang, Zheng; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Wu, Xiongwei] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Fu, Lijun] Nanjing Tech Univ, Coll Energy, Nanjing 211816, Jiangsu, Peoples R China.

关键词： disordered carbon;gel polymer electrolytes;graphene;quasi-solid-state;sodium-ion capacitors

摘要： A quasi-solid-state sodium-ion capacitor is demonstrated with nanoporous disordered carbon and macroporous graphene as the negative and positive electrodes, respectively, using a sodium-ion-conducting gel polymer electrolyte. It can operate at a cell voltage as high as 4.2 V with an energy density of record high 168 W h kg^-1. &copy;2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

语种： 英文

作者： Zhao, Xuebing*;Peng, Feng;Cheng, Keke;Liu, Dehua

期刊： Enzyme and Microbial Technology,2009年44(1):17-23 ISSN：0141-0229

通讯作者： Zhao, Xuebing

作者机构： [Zhao, Xuebing; Liu, Dehua] Tsinghua Univ, Dept Chem Engn, Inst Appl Chem, Beijing 100084, Peoples R China.;[Peng, Feng] Hunan Agr Univ, Coll Sci, Changsha 410028, Peoples R China.;[Cheng, Keke] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China.

通讯机构： [Zhao, Xuebing] Tsinghua Univ, Dept Chem Engn, Inst Appl Chem, Beijing 100084, Peoples R China.

关键词： Sugarcane bagasse;Pretreatment;Alkaline swelling;Peracetic acid;Delignification;Enzymatic digestibility

摘要： The enzymatic digestibility of sugarcane bagasse was greatly increased by alkali (NaOH)-peracetic acid (PAA) pretreatment under mild conditions. The effects of several factors affecting the pretreatment were investigated. It was found that when bagasse was pre-pretreated by 10% (based on initial dry materials) NaOH with 3:1 liquid-to-solid ratio at 90 degrees C for 1.5 h and further delignified by 10% peracetic acid (based on initial dry materials) at 75 degrees C for 2.5 h, the yield of reducing sugars reached 92.04% by enzymatic hydrolysis for 120 h with cellulase loading of 15 FPU/g solid. Compared with acid and alkali pretreatment, alkali-PAA pretreatment could be conducted under milder conditions and was more effective for delignification with less carbohydrates being degraded in the pretreatment process. Alkaline stage played an important role for partial delignification, swelling fibers and subsequently reducing PAA loading. No loss of cellulase activity (FPA) was observed in the liquid phase for alkali-PAA pretreated bagasse after enzymatic hydrolysis for 120 h. (C) 2008 Elsevier Inc. All rights reserved.

语种： 英文

作者： Zhao, Xuebing*;Peng, Feng;Du, Wei;Liu, Canming;Liu, Dehua

期刊： Bioprocess and Biosystems Engineering,2012年35(6):993-1004 ISSN：1615-7591

通讯作者： Zhao, Xuebing

作者机构： [Zhao, Xuebing; Liu, Dehua; Du, Wei] Tsinghua Univ, Inst Appl Chem, Dept Chem Engn, Beijing 100084, Peoples R China.;[Peng, Feng; Liu, Canming] Hunan Agr Univ, Coll Sci, Changsha 410028, Hunan, Peoples R China.

通讯机构： [Zhao, Xuebing] Tsinghua Univ, Inst Appl Chem, Dept Chem Engn, Beijing 100084, Peoples R China.

关键词： Yeast lipid;Lignocellulosic biomass;Detoxification of hydrolyzate;Inhibition;Biodiesel

摘要： Microbial lipid produced using yeast fermentation with inexpensive carbon sources such as lignocellulosic hydrolyzate can be an alternative feedstock for biodiesel production. Several inhibitors that can be generated during acid hydrolysis of lignocellulose were added solely or together into the culture medium to study their individual inhibitory actions and their synergistic effects on the growth and lipid accumulation of oleaginous yeast Rhodosporidium toruloides. When the inhibitors were present in isolation in the medium, to obtain a high cell biomass accumulation, the concentrations of formic acid, acetic acid, furfural and vanillin should be lower than 2, 5, 0.5 and 1.5 g/L, respectively. However, the synergistic effects of these compounds could dramatically decrease the minimum critical inhibitory concentrations leading to significant growth and lipid production inhibitions. Unlike the above-cited inhibitors, sodium lignosulphonate had no negative influence on biomass accumulation when its concentration was in the range of 0.5-2.0 g/L; in effect, it was found to facilitate cell growth and sugar-to-lipid conversion. The fatty acid compositional profile of the yeast lipid was in the compositional range of various plant oils and animal tallow. Finally, the crude yeast lipid from bagasse hydrolyzate could be well converted into fatty acid methyl ester (FAME, biodiesel) by enzymatic transesterification in a tert-butanol system with biodiesel yield of 67.2% and lipid-to-biodiesel conversion of 88.4%.

语种： 英文

作者： Deng, Lei;Hu, Wangyu*;Deng, Huiqiu;Xiao, Shifang;Tang, Jianfeng

期刊： Journal of Physical Chemistry C,2011年115(23):11355-11363 ISSN：1932-7447

通讯作者： Hu, Wangyu

作者机构： [Xiao, Shifang; Deng, Lei; Deng, Huiqiu; Tang, Jianfeng; Hu, Wangyu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.;[Tang, Jianfeng] Hunan Agr Univ, Dept Appl Phys, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Hu, Wangyu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.

摘要： Monte Carlo simulations were performed to study systematically the surface segregation behaviors and atomic-scale structural features of Au-Ag nanoparticles for a range of alloy compositions, particle sizes, and temperatures. Segregation of Ag to the surface was observed in all the particles considered. The surface segregation was promoted by increasing the particle sizes or Ag compositions and decreasing nanoparticles' temperatures. It was found that the most stable mixing patterns are the onionlike structure with Ag-rich shell for small particles, and the alloyed-core/layered-shell structure for large particles. Accordingly, the calculated alloying extents based on Monte Carlo simulations are consistent with experimental EXAFS analysis, which indicates more obvious alloying features in nanoparticles with larger sizes or at higher temperatures, and more obvious segregated features in nanoparticles under the opposite conditions. The size distribution of Au ensembles on different coordinated sites was analyzed quantitatively, which presented varied composition-and temperature-dependent effects. The possible effects of size and shape distribution of surface ensembles on tuning the catalytic activity and selectivity of bimetallic nanoparticles were also discussed. &copy;2011 American Chemical Society.

语种： 英文

作者： Zhang, Hui;Qiao, Hang;Wang, Haiyan*;Zhou, Nan;Chen, Jiajie;Tang, Yougen;Li, Jingsha;Huang, Chenghuan

期刊： Nanoscale,2014年6(17):10235-10242 ISSN：2040-3364

通讯作者： Wang, Haiyan

作者机构： [Zhang, Hui; Qiao, Hang; Wang, Haiyan; Li, Jingsha; Chen, Jiajie; Tang, Yougen] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Zhou, Nan] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Huang, Chenghuan] Hunan Changyuan Lico Co Ltd, Changsha 410205, Hunan, Peoples R China.

通讯机构： [Wang, Haiyan] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.

摘要： High-performance, low cost catalyst for oxygen reduction reaction (ORR) remains a big challenge. Herein, nanostructured NiCo2O4/CNTs hybrid was proposed as a high-performance catalyst for metal/air battery for the first time. The well-formed NiCo2O4/CNTs hybrid was studied by steady-state linear polarization curves and galvanostatic discharge curves in comparison with CNTs-free NiCo2O4 and commercial carbon-supported Pt. Because of the synergistic effect, NiCo2O4/CNTs hybrid exhibited significant improvement of catalytic performance in comparison with NiCo2O4 or CNTs alone, even outperforming Pt/C hybrid in ORR process. In addition, the benefits of Ni incorporation were demonstrated by the improved catalytic performance of NiCo2O4/CNTs compared to Co3O4/CNTs, which should be attributed to improved electrical conductivity and new, highly efficient, active sites created by Ni cation incorporation into the spinel structure. NiCo2O4/CNTs hybrid could be used as a promising catalyst for high power metal/air battery.

语种： 英文

作者： Zhao, Kuangmin;Liu, Suqin*;Ye, Guanying;Gan, Qingmeng;Zhou, Zhi;He, Zhen*

期刊： Journal of Materials Chemistry A,2018年6(5):2166-2175 ISSN：2050-7488

通讯作者： Liu, Suqin;He, Zhen

作者机构： [Gan, Qingmeng; He, Zhen; Liu, Suqin; Ye, Guanying; He, Z; Zhao, Kuangmin] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Gan, Qingmeng; Ye, Guanying; Zhao, Kuangmin] Cent S Univ, Innovat Base Energy & Chem Mat Grad Students Trai, Changsha 410083, Hunan, Peoples R China.;[Zhou, Zhi] Hunan Agr Univ, Sci Coll, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Liu, SQ; He, Z] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.

摘要： Two-dimensional (2D) metal-organic frameworks (MOFs) have been considered as promising precursors for the synthesis of 2D carbon materials for energy storage. However, the high costs and low yields of the synthetic methods for 2D MOFs are major obstacles for the preparation of 2D carbon materials from 2D MOFs. Herein, we report a facile and low-cost bottom-up synthesis of ultrathin Zn(bim)(OAc) MOF nanosheets (with a thickness of &sim;5 nm and a high yield of &sim;65%) and their derived N-doped porous ultrathin (2.5 &plusmn;0.8 nm) carbon nanosheets (UT-CNSs) for energy storage. The UT-CNSs exhibit a capacitance of 278 F g^-1at a high current density of 10 A g^-1, which is the highest among the reported MOF-derived carbon materials for supercapacitor electrodes. In addition, the UT-CNSs also exhibit a high reversible capacity of 553 mA h g^-1at 10 A g^-1and retain 100% coulombic efficiency after 1000 cycles at 2 A g^-1as an anode material for lithium ion batteries. The superior electrochemical properties of the UT-CNSs, especially at high current densities, are mainly due to their ultrathin morphology, large specific surface area, high conductivity, and suitable porous structure. This work provides a new strategy for the high-yield and low-cost synthesis of ultrathin MOF nanosheets as well as 2D carbon materials and their metal or metal oxide composites for various applications.<br/> &copy;2018 The Royal Society of Chemistry.

语种： 英文

作者： Zhou, Nan;Chen, Honggang;Xi, Junting;Yao, Denghui;Zhou, Zhi*;Tian, Yun;Lu, Xiangyang

期刊： Bioresource Technology,2017年232:204-210 ISSN：0960-8524

通讯作者： Zhou, Zhi

作者机构： [Chen, Honggang; Zhou, Nan; Zhou, Zhi; Yao, Denghui] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Xi, Junting] China Pharmaceut Univ, Sch Sci, Nanjing 211198, Jiangsu, Peoples R China.;[Tian, Yun; Lu, Xiangyang] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.;[Tian, Yun; Lu, Xiangyang] Hunan Agr Univ, Hunan Prov Univ Key Lab Agr Biochem & Biotransfor, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Zhou, Zhi] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

关键词： Biochar;Hydrothermal carbonization;Lead removal;Banana peel

摘要： Fresh and dehydrated banana peels were used as biomass feedstock to produce highly effective sorbent biochars through a facile one-step hydrothermal carbonization approach with 20%vol phosphoric acid as the reaction medium. The elemental ratio of oxygen content of the two as-prepared biochars were about 20%, and the FT-IR analysis confirmed the existence of abundant surface functional groups such as hydroxyl and carboxyl which greatly enhanced the adsorption performance. The sorbents showed excellent lead clarification capability of 359&nbsp;mg&middot;g^&minus;1and 193&nbsp;mg&middot;g^&minus;1for dehydrated and fresh banana peels based biochars, respectively. The change of the C[dbnd]O/O&ndash;C[dbnd]O and the appearance of Pb&ndash;O/Pb&ndash;O&ndash;C on the surface after adsorption confirmed that the ion exchange might be the dominant mechanism. The dehydration and pulverization pre-treatment and the addition of phosphoric acid can benefit the formation of those functional groups and hydrothermal carbonization can be a promising method to transfer biomass like fruit peels into biochars with excellent adsorption performance. &copy;2017 Elsevier Ltd

语种： 英文

作者： Zhang, Hui;Li, Huiyong;Wang, Haiyan*;He, Kejian;Wang, Shuangyin;Tang, Yougen;Chen, Jiajie

期刊： Journal of Power Sources,2015年280:640-648 ISSN：0378-7753

通讯作者： Wang, Haiyan

作者机构： [Zhang, Hui; Wang, Haiyan; Chen, Jiajie; Tang, Yougen] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Huiyong] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[He, Kejian] Cent S Univ, Adv Res Ctr, Changsha 410083, Hunan, Peoples R China.;[Wang, Shuangyin] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.

通讯机构： [Wang, Haiyan] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.

关键词： Nickel cobalt oxide;Nitrogen doped graphene;Oxygen reduction reaction;Electrocatalyst;Active sites

摘要： Developing low-cost catalyst for high-performance oxygen reduction reaction (ORR) is highly desirable. Herein, NiCo<inf>2</inf>O<inf>4</inf>/N-doped reduced graphene oxide (NiCo<inf>2</inf>O<inf>4</inf>/N-rGO) hybrid is proposed as a high-performance catalyst for ORR for the first time. The well-formed NiCo<inf>2</inf>O<inf>4</inf>/N-rGO hybrid is studied by cyclic voltammetry (CV) curves and linear-sweep voltammetry (LSV) performed on the rotating-ring-disk-electrode (RDE) in comparison with N-rGO-free NiCo<inf>2</inf>O<inf>4</inf> and the bare N-rGO. Due to the synergistic effect, the NiCo<inf>2</inf>O<inf>4</inf>/N-rGO hybrid exhibits significant improvement of catalytic performance with an onset potential of -0.12 V, which mainly favors a direct four electron pathway in ORR process, close to the behavior of commercial carbon-supported Pt. Also, the benefits of N-incorporation are investigated by comparing NiCo<inf>2</inf>O<inf>4</inf>/N-rGO with NiCo<inf>2</inf>O<inf>4</inf>/rGO, where higher cathodic currents, much more positive half-wave potential and more electron transfer numbers are observed for the N-doping one, which should be ascribed to the new highly efficient active sites created by N incorporation into graphene. The NiCo<inf>2</inf>O<inf>4</inf>/N-rGO hybrid could be used as a promising catalyst for high power metal/air battery. &copy;2015 Published by Elsevier B.V..

语种： 英文

作者： Gao, Xu;Zhang, Feng;Deng, Guojun;Yang, Luo*

期刊： ORGANIC LETTERS,2014年16(14):3664-3667 ISSN：1523-7060

通讯作者： Yang, Luo

作者机构： [Gao, Xu; Deng, Guojun; Yang, Luo] Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Hunan, Peoples R China.;[Zhang, Feng] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Yang, Luo] Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Hunan, Peoples R China.

摘要： A practical Bronsted acid promoted benzylic C-H functionalization of 2-alkylazaarenes and nucleophilic addition to nitroso compounds was developed under mild conditions. Switched by Bronsted acids, this method can afford azaarene-2-aldimines, azaarene-2-carbaldehyde, or azaarene-2-oximes selectively. No metal, base, oxidant, or other additives were required.

语种： 英文

作者： Wang, Fang*;Liao, Gui-ping;Zhou, Xiao-yang;Shi, Wen

期刊： Nonlinear Dynamics,2013年72(1-2):353-363 ISSN：0924-090X

通讯作者： Wang, Fang

作者机构： [Shi, Wen; Wang, Fang] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Liao, Gui-ping; Wang, Fang] Hunan Agr Univ, Agr Informat Inst, Changsha 410128, Hunan, Peoples R China.;[Zhou, Xiao-yang] Huazhong Univ Sci & Technol, Dept Math, Wuhan 430074, Peoples R China.

通讯机构： [Wang, Fang] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

关键词： Auto-correlation;Power time series;Multifractal detrended analysis;Multifractal detrended cross-correlation analysis;Time-delay

摘要： Multifractal theory has been widely used in kinds of field. In this paper, methods were proposed to study in the power-law auto-correlation and cross-correlation of power operating data based on multifractal detrended analysis (MF-DFA) and multifractal detrended cross-correlation analysis (MF-DXA). We find that both the price and the load time series in California power market and PJM power market exhibit long-term correlation. And the cross-correlation behaviors of the two series in each power market and between the two markets are also analyzed by the method MF-DXA after testing the existence of the cross-correlation of the above power operating data. However, there are some differences in the cross-correlation behaviors between the two markets. It shows that the cross-correlation of the price and the load is significant in every time periods in California 1999 power market, but in the year of 2000 in the same region market, the cross-correlation is insignificant in most time periods. Meanwhile, we conclude that cross-correlation is weaker in the California market than in the PJM market by studying the two consecutive years of the California 1999-2000 and PJM 2001-2002 power markets. We also discuss how the time intervals affect the cross-correlation exponents of the power operating data based on time-delay MF-DXA. An interesting finding is that the biggest cross-correlation exponent of the two series appeared in about 12 days time delay for the PJM 2001 power market and strongest cross-correlation in the California 1999 power market is found in lots of cyclical time intervals. &copy;2013 Springer Science+Business Media Dordrecht.

语种： 英文

作者： Deng, Peihong*;Xu, Zhifeng;Zeng, Rongying;Ding, Chunxia

期刊： Food Chemistry,2015年180:156-163 ISSN：0308-8146

通讯作者： Deng, Peihong

作者机构： [Deng, Peihong; Xu, Zhifeng; Zeng, Rongying] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Zeng, Rongying] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.;[Ding, Chunxia] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.

通讯机构： [Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.

关键词： Electrochemical behavior;Electrochemical sensor;Graphene-polyvinylpyrrolidone composite film;Vanillin;Voltammetric determination

摘要： The graphene-polyvinylpyrrolidone composite film modified acetylene black paste electrode (GR-PVP/ABPE) was fabricated and used to determine vanillin. In 0.1 M H<inf>3</inf>PO<inf>4</inf> solution, the oxidation peak current of vanillin increased significantly at GR-PVP/ABPE compared with bare ABPE, PVP/ABPE and GR/ABPE. The oxidation mechanism was discussed. The experimental conditions that exert influence on the voltammetric determination of vanillin, such as supporting electrolytes, pH values, accumulation potential and accumulation time, were optimized. Besides, the interference, repeatability, reproducibility and stability measurements were also evaluated. Under the optimal experimental conditions, the oxidation peak current was proportional to vanillin concentration in the range of 0.02-2.0 &mu;M, 2.0-40 &mu;M and 40-100 &mu;M. The detection limit was 10 nM. This sensor was used successfully for vanillin determination in various food samples. &copy;2015 Elsevier Ltd. All rights reserved.

语种： 英文