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Preparation of shape-controlling V0_(2)(M/R)nanoparticles via one-step hydrothermal synthesis

Frontiers of Optoelectronics 2021年第3期14卷 311-320页

作者： Yuchao LI Fengyu KONG Bin WANG Yanhua ZHAO Zuankai WANG Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Shenzhen Research Institute of City University of Hong Kong Shenzhen 518057China Ningbo University of Technology Ningbo 315211China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

In this study,we developed a facile one-step hydrothermal process that allows to synthesize high-purity V0_(2)(M/R)nanoparticles with various morphologies such as nanorods,nanogranules,nanoblocks,and nanospheres.W dopants are successfully implanted in V02(M/R)unit cells with high doping efficiency,which allows to regulate the size,morphology,and phase of obtained *** underlying regulation mechanism is presented in detail to reveal how hydrothermal products vary with W doping contents,which provides a synthetic strategy for the preparation of shape-controlling V02(M/R)nanoparticles with high purity to satisfy different specific demands for corresponding applications in the field of thermochromic smart windows.

关键词： one-step hydrothermal W doping shapecontrolling VO_(2)(M/R)nanoparticles

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Preparation of MnO2 Loaded hydrothermal Carbon-coated Electrospun PAN Fiber Membranes for Highly Efficient Adsorption and Separation of Cationic Dye

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Chemical Research in Chinese Universities 2020年第6期36卷 1292-1301页

作者： WANG Yuannan LI Wenyan CHAO Shen LI Yanzi LI Xiang HE Dayong WANG Ce Alan G.MacDiarmid Institute College of ChemistryJilin UniversityChangchun 130012P.R.China Teaching Experimental Center Hebei Normal University for NationalitiesChengde 067000P.R.China

hydrothermal carbonaceous materials and MnO2 have been proved to be promising adsorbents to remove organic dyes from *** this study,flexible MnO2 loaded hydrothermal carbon-coated electrospun poly-acrylonitrile(AC/MnO/PAN)fiber membranes were fabricated by a facile one-step hydrothermal method and activated by NaOH *** composite fibers exhibited large adsorption capacity toward cationic dyes and ex-cellent mechanical *** adsorption performance can be ftted well with pseudo-second order model and Langmuir isotherm *** maximum adsorption for methylene blue(MB),methyI violet(MV)and malachite green(MG)are 1173.27,1106.31 and 1129.89 mg/g,respectively,according to Langmuir *** AC/MnO/PAN fiber membrane also showed satisfactory performances for selective adsorption and *** addition,based on selective adsorption,the AC/MnOz/PAN fiber membranes that are repulsive to the anionic dye methyl orange(MO)can separate the MB/MO mixture solution by dynamic ***,this work not only provides a facile strategy to fabricate large capacity adsorbents,but also dermonstrates the potential appications in the dye wastewater treatment field.

关键词： Carbon MnO one-step hydrothermal Electrospinning Adsorption Cationic dye

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High electro-catalytic graphite felt/Mn O2composite electrodes for vanadium redox flow batteries

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Science China Chemistry 2018年第6期61卷 732-738页

作者： Qiang Ma Qi Deng Hang Sheng Wei Ling Hong-Rui Wang Hai-Wen Jiao Xiong-Wei Wu Wen-Xin Zhou Xian-Xiang Zeng Ya-Xia Yin Yu-Guo Guo College of Science Hunan Agricultural University Changsha 410128 China Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 China Hunan Province Yin Feng New Energy Co. LTD Changsha 410000 China

A mild and simple synthesis process for large-scale vanadium redox flow batteries(VRFBs)energy storage systems is desirable.A graphite felt/Mn O_2(GF-MNO)composite electrode with excellent electrocatalytic activity towards VO^(2+)/VO_2^+redox couples in a VRFB was synthesized by a one-step hydrothermal *** resulting GF-MNO electrodes possess improved electrochemical kinetic reversibility of the vanadium redox reactions compared to pristine GF electrodes,and the corresponding energy efficiency and discharge capacity at 150 m A cm^(-2)are increased by 12.5%and 40%,*** discharge capacity is maintained at 4.8 A h L^(-1)at the ultrahigh current density of 250 m A cm^(-2).Above all,80%of the energy efficiency of the GF-MNO composite electrodes is retained after 120 charge-discharge cycles at 150 m A cm^(-2).Furthermore,these electrodes demonstrated that more evenly distributed catalytic active sites were obtained from the Mn O_2particles under acidic *** proposed synthetic route is facile,and the raw materials are low cost and environmentally ***,these novel GF-MNO electrodes hold great promise in large-scale vanadium redox flow battery energy storage systems.

关键词： VRFB one-step hydrothermal graphite felt manganese dioxide composite electrode

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