The Experts below are selected from a list of 8574 Experts worldwide ranked by ideXlab platform
Peng Fei - One of the best experts on this subject based on the ideXlab platform.
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preparation and adsorption properties of enhanced magnetic zinc ferrite reduced graphene oxide nanocomposites via a facile one pot Solvothermal Method
Journal of Alloys and Compounds, 2016Co-Authors: Peng Fei, Qiang Wang, Ming ZhongAbstract:Abstract The wide application of reduced graphene oxide (rGO) in water treatment is mainly suffered from high cost and difficult reusage. To addressing these issues, a series of zinc ferrite-reduced graphene oxide (ZF-rGO) nanocomposites with enhanced magnetic properties were successfully prepared using graphene oxide (GO), Fe3+, Zn2+ and ethylene glycol (EG) via a one-pot Solvothermal Method and the adsorption property was evaluated by the adsorption amount of methylene blue (MB) solution on the samples. The results indicate the as-prepared materials possess good adsorption and cycling properties for MB molecules. The dominated reason is mainly ascribed to the π-π stacking between dye molecules and rGO. Simultaneously, the adsorption kinetic behavior of MB molecules is also discussed and follows pseudo-second-order kinetic very well. Particularly, the introduction of Fe2+ enhances the magnetic property of ZF component in ZF-rGO composite by the reducing action of EG, which ensures the outstanding magnetic separability of the ZF-rGO materials as the adsorbent. Thus, the as-prepared nanocomposite material can be a potential excellent absorbent for removing dye pollutants.
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magnetic and electrochemical properties of pani cofe2o4 nanocomposites synthesized via a novel one step Solvothermal Method
Journal of Alloys and Compounds, 2016Co-Authors: Na Dong, Peng Fei, Ming Zhong, Ziqiang LeiAbstract:Abstract In this study, a novel one-step Solvothermal Method was carried out to synthesize a series of polyaniline-cobalt ferrite nanocomposites (PANI-CoFe2O4) with different contents of PANI. The structure, morphological, magnetic and electrochemical properties of the as-prepared PANI-CoFe2O4 (PANI-CF) samples were characterized by various techniques. The results of X-ray diffraction (XRD) and Fourier transform infrared (IR) indicated the successful synthesis of PANI-CF nanocomposite materials with the component CoFe2O4 showing spinel structure and the size of the composite material was less than 20 nm. Their magnetic properties were remarkably superior to pure CoFe2O4, ascribed to good crystalline of CoFe2O4, nanoscale composite and strong interaction between CoFe2O4 and PANI, and induced magnetic field from the directional movement of π-electrons of PANI under applied magnetic field. Otherwise, these composite materials showed good electrochemical behavior, indicating that they were doped by Fe3+/Co2+ ions and doping metallic ions into PANI could also improve its electrochemical performance.
Tsugio Sato - One of the best experts on this subject based on the ideXlab platform.
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synthesis of high visible light active carbon doped tio2 photocatalyst by a facile calcination assisted Solvothermal Method
Applied Catalysis B-environmental, 2013Co-Authors: Xiaoyong Wu, Qiang Dong, Huihui Li, Takeshi Kimura, Tsugio SatoAbstract:Abstract The carbon doped TiO2 powders have been successfully prepared by a facile calcination assisted Solvothermal Method using titanium tetra-n-butoxide or TiCl3 together with ethanol as starting materials without the addition of any other extra carbon sources. The physicochemical properties of as-synthesized samples were characterized by the X-ray diffraction, Fourier transform-infrared spectroscopy, UV–vis diffuse reflectance spectroscopy, BET specific surface area, and X-ray photoelectron spectroscopy. Besides, the effects of post Solvothermal reaction heating temperature and raw materials on the carbon doping in TiO2 have been investigated. The experimental results showed that carbon has been doped into TiO2 lattice by replacing the oxygen site with the production of oxygen vacancy. In addition, carbon doped TiO2 samples exhibited not only very good destruction ability of NO gas but also excellent degradation ability of methyl orange solution under the visible light much superior to P25 and N–TiO2. The employed Method in this work provided a favorable evidence that the effect of carbon doping on the properties of samples should be taken into consideration when preparing TiO2 based photocatalyst by a hydrothermal or Solvothermal Method with the assist of calcination.
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a fast and template free synthesis of tb y2o3 hollow microspheres via supercritical Solvothermal Method
Crystal Growth & Design, 2009Co-Authors: Kempaiah M Devaraju, Shu Yin, Tsugio SatoAbstract:The design of template-free hollow microspheres in a very short period of time will be of great importance to save energy and time and allow rapid production. We succeeded in the rapid synthesis of precursor material via a supercritical Solvothermal Method followed by subsequent heating to obtain Tb:Y2O3 hollow microspheres. The prepared precursor material was actually composed of Y(OH)3 and Y(OH)CO3 phases. The hollow microspheres seemed to be formed through the aggregation of nanoparticles under supercritical conditions. The formation mechanism of hollow microspheres in the present synthesis is the Ostwald ripening process. Effects of reaction temperature and pH of the starting solution were investigated to understand the effect on the formation of hollow microspheres. Well-shaped Tb:Y2O3 hollow microspheres showed strong green emission at 540 nm under 304 nm light excitation. The effect of doping concentrations and calcinations temperature was investigated.
Ming Zhong - One of the best experts on this subject based on the ideXlab platform.
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preparation and adsorption properties of enhanced magnetic zinc ferrite reduced graphene oxide nanocomposites via a facile one pot Solvothermal Method
Journal of Alloys and Compounds, 2016Co-Authors: Peng Fei, Qiang Wang, Ming ZhongAbstract:Abstract The wide application of reduced graphene oxide (rGO) in water treatment is mainly suffered from high cost and difficult reusage. To addressing these issues, a series of zinc ferrite-reduced graphene oxide (ZF-rGO) nanocomposites with enhanced magnetic properties were successfully prepared using graphene oxide (GO), Fe3+, Zn2+ and ethylene glycol (EG) via a one-pot Solvothermal Method and the adsorption property was evaluated by the adsorption amount of methylene blue (MB) solution on the samples. The results indicate the as-prepared materials possess good adsorption and cycling properties for MB molecules. The dominated reason is mainly ascribed to the π-π stacking between dye molecules and rGO. Simultaneously, the adsorption kinetic behavior of MB molecules is also discussed and follows pseudo-second-order kinetic very well. Particularly, the introduction of Fe2+ enhances the magnetic property of ZF component in ZF-rGO composite by the reducing action of EG, which ensures the outstanding magnetic separability of the ZF-rGO materials as the adsorbent. Thus, the as-prepared nanocomposite material can be a potential excellent absorbent for removing dye pollutants.
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magnetic and electrochemical properties of pani cofe2o4 nanocomposites synthesized via a novel one step Solvothermal Method
Journal of Alloys and Compounds, 2016Co-Authors: Na Dong, Peng Fei, Ming Zhong, Ziqiang LeiAbstract:Abstract In this study, a novel one-step Solvothermal Method was carried out to synthesize a series of polyaniline-cobalt ferrite nanocomposites (PANI-CoFe2O4) with different contents of PANI. The structure, morphological, magnetic and electrochemical properties of the as-prepared PANI-CoFe2O4 (PANI-CF) samples were characterized by various techniques. The results of X-ray diffraction (XRD) and Fourier transform infrared (IR) indicated the successful synthesis of PANI-CF nanocomposite materials with the component CoFe2O4 showing spinel structure and the size of the composite material was less than 20 nm. Their magnetic properties were remarkably superior to pure CoFe2O4, ascribed to good crystalline of CoFe2O4, nanoscale composite and strong interaction between CoFe2O4 and PANI, and induced magnetic field from the directional movement of π-electrons of PANI under applied magnetic field. Otherwise, these composite materials showed good electrochemical behavior, indicating that they were doped by Fe3+/Co2+ ions and doping metallic ions into PANI could also improve its electrochemical performance.
Zifeng Yan - One of the best experts on this subject based on the ideXlab platform.
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facile preparation of cu cu2o nanoporous nanoparticles as a potential catalyst for non enzymatic glucose sensing
RSC Advances, 2013Co-Authors: Yuxin Zhao, Zifeng YanAbstract:We achieved the successful synthesis of Cu–Cu2O nanoporous nanoparticles by the reduction of chalcanthite with ethylene glycol via a facile Solvothermal Method involving introducing oxygen. The resultant material showed a good linear dependence, an extraordinary limit of detection and a high sensitivity to the detection of glucose.
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study on the photocatalysis of f s co doped tio2 prepared using Solvothermal Method
Applied Catalysis B-environmental, 2010Co-Authors: Guidong Yang, Zheng Jiang, Huahong Shi, Martin O Jones, Tiancun Xiao, Peter P Edwards, Zifeng YanAbstract:Abstract Fluorine–sulfur (F–S) co-doped TiO2 materials have been prepared using low-temperature Solvothermal Method, and tested for catalytic activity by the visible light photocatalytic degradation of the Methylene Blue. For comparison, the mono-elemental doped samples, e.g., S- and F-doped TiO2 have also been prepared and tested under the same conditions. The characterization results showed that F–S co-doped TiO2 has a higher photocatalytic activity than that of mono-doped F- and S-doped samples under visible light irradiation. It is believed that the co-doping gives rise to a localized state in the band gap of the oxide and creates active surface oxygen vacancies, both which are responsible for visible light absorption and the promotion of electrons from the localized states to the conduction band. Characterization by electron paramagnetic resonance revealed the presence of a superoxide radical (O2 −) which may be mainly responsible for photodegradation of Methylene Blue under visible light.
Shichao Zhang - One of the best experts on this subject based on the ideXlab platform.
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uniform li1 2ni0 13co0 13mn0 54o2 hollow microspheres with improved electrochemical performance by a facile Solvothermal Method for lithium ion batteries
Electrochimica Acta, 2018Co-Authors: Xin Wei, Puheng Yang, Yanbiao Ren, Shengbin Wang, Yalan Xing, Shichao ZhangAbstract:Abstract Here, we designed a facile Solvothermal Method to prepare Li1.2Ni0.13Co0.13Mn0.54O2 hollow microspheres with considerable uniformity and monodispersity. In this Method, lithium ions and transition metal carbonate have been simultaneously precipitated in the ethanol-polyethylene glycol mixed solvent system to form carbonate precursors, which subsequently transform into self-assembled hollow microspheres by a heat treatment. As cathode material for lithium ion batteries, its unique structure makes for sufficient contact between electrode and electrolyte to provide more reaction sites and shorter paths for Li+ transportation, contributing to remarkable cycling stability and excellent rate capability with improved electrochemical kinetics properties. Specifically, Li1.2Ni0.13Co0.13Mn0.54O2 hollow microspheres achieve a high initial discharge capacity of 287 mAh g−1 at 0.1 C and 234 mAh g−1 at 1 C, with capacity retentions of 85.7% and 81.3% after 100 cycles, respectively. Besides, it exhibits a high rate capacity of 150 mAh g−1 even at 5 C. Moreover, the present synthesis Method could also provide an effective and promising strategy for the preparation of high energy density cathode materials for lithium ion batteries.
