作者机构：
[Wong, Po Keung; Wang, Wanjun; Yip, Ho Yin] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China.;[Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Yu, Jimmy C.] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China.;[An, Taicheng; Li, Guiying] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Ke, Yan] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nano Sci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
In this paper, carbon coated Fe3O4 nanospindles (C@Fe3O4 NSs) were synthesized by partial reduction of monodispersed hematite nanospindles with carbon coatings and applied to investigate the direct electrochemistry of myoglobin (Mb). A novel modified electrode was prepared by applying carbon coated Fe3O4 nanospindles, Mb, ionic liquid (IL), 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM]EtOSO3) and chitosan (CTS) step by step onto the surface of a carbon ionic liquid electrode (CILE) with another ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4), as the binder. UV-Vis absorption and FT-IR spectra results indicated that Mb retained its native structure in the composite film. The electrochemical behavior of the CTS/IL/Mb/C@Fe3O4/CILE was investigated and a pair of well-defined redox peaks appeared, which indicated that the direct electron transfer of Mb was realized with the underlying electrode. The fabricated CTS/IL/Mb/C@Fe3O4/CILE showed good electrocatalytic activity in the reduction of trichloroacetic acid (TCA) with a linear range from 1.0 to 20.0 mM, which showed potential applications for fabricating novel electrochemical biosensors and bioelectronic devices.
作者机构：
[Wang Wanjun; Yip Ho Yin; Wong Po Keung] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China.;[Yu Ying] Huazhong Normal Univ, Sch Phys & Technol, Wuhan, Peoples R China.
会议名称：
3rd International Symposium on Environmental Science and Technology (2011 ISEST)
会议时间：
JUN 01-04, 2011
会议地点：
Dongguan, PEOPLES R CHINA
会议主办单位：
[Wang Wanjun;Yip Ho Yin;Wong Po Keung] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China.^[Yu Ying] Huazhong Normal Univ, Sch Phys & Technol, Wuhan, Peoples R China.
关键词：
photocatalytic disinfection;bismuth vanadate;reactive charged and oxidative species;partition setup;band structure
摘要：
Studies on visible-light-driven (VLD) photocatalysis indicate its excellent potential as an alternative bacterial disinfection process. In this study, bismuth vanadate (BiVO4) nanotube (BV-NT) was synthesized by a template-free solvothermal method. The BV-NT showed remarkable VLD photocatalytic disinfection to Escherichia coli K-12. Various scavengers were used to detect the major reactive charged and oxidative species involving in photocatalytic bacterial disinfection. Results showed that .OHb and reactive species generated at the conduction band (i.e. e(-) and .O-2) have no significant effect on the photocatalytic bacterial disinfection. The h(+) and .OHb, were the dominant reactive species in the VLD photocatalytic disinfection, while H2O2 generated from valence band only played a minor role. The individual role of h(+) and .OHS, was confirmed by adopting F- surface modification and anaerobic experiments. With the "partition system" and transmission electron microscopic studies, it was found that the effective bacterial inactivation required the bacteria cell direct contact with the BV-NT. Based on the band structure of BV-NT, reactive species cannot produce from the conduction band, and only the reactive species generated from the valence band involve in the VLD photocatalytic bacterial disinfection by BV-NT.
作者机构：
School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China;School of Physics and Technology, Huazhong Normal University, Wuhan, China
会议名称：
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
会议时间：
2011-06-01
会议地点：
广东东莞
会议论文集名称：
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)论文集
摘要：
Studies on visible-light-driven (VLD) photocatalysis indicate its excellent potential as an alternative bacterial disinfection process. In this study, bismuth vanadate (BiVO4) nanotube (BV-NT) was synthesized by a template-free solvothermal method. The BV-NT showed remarkable VLD photocatalytic disinfection to Escherichia coli K-12. Various scavengers were used to detect the major reactive charged and oxidative species involving in photocatalytic bacterial disinfection. Results showed that.OHb and reactive species generated at the conduction band (i.e. e-and.O2 -) have no significant effect on the photocatalytic bacterial disinfection. The h+and.OHs were the dominant reactive species in the VLD photocatalytic disinfection, while H2O2 generated from valence band only played a minor role. The individual role of h+and.OHs was confirmed by adopting F-surface modification and anaerobic experiments. With the “partition system” and transmission electron microscopic studies, it was found that the effective bacterial inactivation required the bacteria cell direct contact with the BV-NT. Based on the band structure of BV-NT, reactive species cannot produce from the conduction band, and only the reactive species generated from the valence band involve in the VLD photocatalytic bacterial disinfection by BV-NT.
作者：
Abdulkarem, A. M.;Li, Jialin;Aref, A. A.;Ren, Lu;Elssfah, E. M.;...
期刊：
Materials Research Bulletin,2011年46(9):1443-1450 ISSN：0025-5408
通讯作者：
Yu, Ying
作者机构：
[Ge, Yunke; Abdulkarem, A. M.; Ren, Lu; Wang, Hui; Li, Jialin; Yu, Ying; Elssfah, E. M.; Aref, A. A.] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
A. Semiconductors;B. Chemical synthesis;D. Optical properties
摘要：
The synthesis of copper bismuth oxide (CuBi2O4) nanorods with single crystal structure by hydrothermal method is first reported here. The prepared CuBi2O4 nanorods are characterized by X-ray diffractometer, scanning electron microscopy, transmission electron microscopy (TEM) and high resolution TEM. It is found that the concentration of reagent cupric acetate has strong effect on the purity and microstructure of the prepared samples. The growth process is investigated in detail. It is proposed that the nanorods are evolved from spherical particles with oriented attachment mechanism followed by dissolution-splitting process. The optical properties of the samples are detected by UV–vis spectrometer and photoluminescence spectrometer and exhibit strong dependence on surface defect states and microstructure feature, which is mainly determined by preparation conditions.
作者：
Aref, A. A.;Xiong, Liangbin;Yan, Nannan;Abdulkarem, A. M.;Yu, Ying*
期刊：
Materials Chemistry and Physics,2011年127(3):433-439 ISSN：0254-0584
通讯作者：
Yu, Ying
作者机构：
[Abdulkarem, A. M.; Xiong, Liangbin; Yan, Nannan; Yu, Ying; Aref, A. A.] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] H;Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
Cuprous oxide (Cu2O) films with different nanostructures are deposited on different substrates of fluorine-doped SnO2 (FTO) glass, Cu and Ti foil respectively by using chemical bath deposition (CBD) technique with the presence of cetyltrimethylammonium bromide (CTAB). The samples are characterized by X-ray diffractmeter, scanning electron microscopy and UV–vis diffuse reflectance spectroscopy. The results show that the prepared Cu2O films are composed of nanorod arrays when there is CTAB in reaction system. Without CTAB, Cu2O films with nanospheres are formed. The concentration of CTAB is crucial for the controllable synthesis of nanorod structured Cu2O films with different length to diameter ratio and nanorod array density is dependent on both substrates and CTAB. A possible mechanism for the formation of Cu2O nanorods is discussed. Additionally, the UV–vis absorption property for Cu2O nanorods is much better than that for nanospheres. The photovoltage produced under visible light for Cu2O nanorod films is higher than that for the nanospheres. Although Cu2O nanorods on Ti foil can absorb the most visible light, those on Cu foil demonstrate better and more stable photoelectrochemical property than those on any other substrates. This study may be extremely useful for Cu2O based device with nanostructures.
摘要：
For the first time, theological phase method, a simple and effective route, is applied to synthesize novel cathode material LiCoPO4. X-ray diffraction spectrometer (XRD), X-ray photoelectron spectrometer (XPS), transmission electron microscope (TEM) and electrochemical impedance spectroscopy (EIS) are taken to investigate this material, respectively. XRD figure shows that the theological sample is better crystallized than the solid-state one. XPS result of the theological sample exhibits that the valence of Co is 2(+). TEm images show that better dispersed particles with smaller size can be formed by theological method comparing to the solid-state route. Charge-discharge test is carried out in the range of 3.0-5.0V at 0.2 mA cm(-2). The initial discharge capacity for theological phase and solid-state powder is 71.5 and 30.9 mAhg(-1), respectively. The better electrochemical property should be ascribed to the better crystallized theological phase production with better dispersed and smaller particles, which can greatly facilitate the diffusion of Li+. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
摘要：
Self-assembled Cu2O flowerlike architecture has been synthesized by polyol process with the presence of acetamide. The synthesized flowerlike architecture is composed of the petals assembled by small crystalline with size of 5–6 nm. The growth mechanism is proposed that the dissolution of the small particles in microsphere center and then the recrystallization on the surface of the microspheres with the increase of reaction time results in the formation of the final flowerlike architecture. The novel architecture shows a blue shift of absorption edge compared to Cu2O nanocubes and good photocatalytic activity for the degradation of dye brilliant red X-3B under simulated solar light. Moreover, the flowerlike architecture is more stable than Cu2O nanocubes during photocatalytic process since the photocatalytic activity of the second reused architecture sample is still twice as high as that of the original nanocubes. The Cu2O flowerlike architecture may be a good photocatalyst candidate for wastewater treatment.
