文献类型：期刊文献

中文题名：Ti掺杂的WO_(3)纳米片光阳极的能带调控和光电化学分解水性能

英文题名：Band gap modulation of nanostructured WO_(3) nanoplate film by Ti doping for enhanced photoelectrochemical performance

作者：唐雅琴 蒋迪 王欢 郑红烨 任露军 魏奎先 马文会 戴永年 罗大军 张学亮 刘仪柯

第一作者：唐雅琴

通信作者：Liu, YK[1];Zhang, XL[2];Liu, YK[2]

机构：[1]Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China

第一机构：Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

通信机构：corresponding author), Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2022

卷号：29

期号：9

起止页码：2968-2979

中文期刊名：中南大学学报：英文版

外文期刊名：Journal of Central South University

收录：CSTPCD;;EI(收录号：20224313007804);Scopus;CSCD:【CSCD2021_2022】；PubMed;

基金：Project(Qian Jiao He KY Zi [2021]257) supported provided by the Natural Science Research Project of Education Department of Guizhou Province, China; Project(GZSQCC2019003) supported by the High-level Innovative Talent Cultivation Project of Guizhou Province, China; Projects(GZLGXM-01, GZLGXM-08) supported by the Academic New Seedling Cultivation and Innovation Exploration Project of Guizhou Institute of Technology, China

语种：中文

中文关键词：WO_(3);Ti掺杂;光阳极;能带调控;表面载流子分离

外文关键词：WO_(3);Ti doping;photoanode;band structure engineering;surface charge separation

摘要：氧化钨(WO_(3))是一种重要的光电化学分解水半导体,具有可见光响应好、无毒、稳定性好等优点,但低的电导率、高的起始电位以及缓慢的水氧化动力学等缺点也限制了其进一步应用。本文采用无晶种水热法在导电玻璃(FTO)上设计了一种钛掺杂的WO_(3)纳米片阵列,并研究了Ti掺杂浓度对光电化学分解水性能的影响。结果表明,在0.6 V(vs Ag/AgCl)的偏压下,Ti掺杂WO_(3)光电流密度最高,可达0.53 mA/cm^(2),比纯WO_(3)纳米片阵列的高110%。同时,Ti掺杂WO_(3)光电极的起始电位负移。X射线光电子能谱价带谱(XPS-VB)和紫外-可见吸收(UV-Vis)光谱显示,Ti掺杂WO_(3)光阳极的能带位置向上移动,导致了起始电位的负移。此外,电化学阻抗谱测试(EIS)表明,Ti掺杂WO_(3)光阳极的导电性显著增强,引起光生载流子的快速分离。研究成果有望提供一种高效、低成本光阳极的设计路线。
Despite being a promising photoanode material for water splitting,WO_(3) has low conductivity,high onset potential,and sluggish water oxidation kinetics.In this study,we designed Ti-doped WO_(3) nanoplate arrays on fluoride-doped tin oxide by a seed-free hydrothermal method,and the effects of doping on the photoelectrochemical performance were investigated.The optimal Ti-doped WO_(3) electrode achieved a photocurrent density of 0.53 mA/cm^(2) at 0.6 V(vs Ag/AgCl),110%higher than that of pure WO_(3) nanoplate arrays.Moreover,a significant cathodic shift in the onset potential was observed after doping.X-ray photoelectron spectroscopy valence band and ultraviolet–visible spectra revealed that the band positions of Ti-doped WO_(3) photoanodes moved upward,yielding a lower onset potential.Furthermore,electrochemical impedance spectroscopy measurements revealed that the conductivities of the WO_(3) photoanodes improved after doping,because of the rapid separation of photo-generated charge carriers.Thus,we report a new design route toward efficient and low-cost photoanodes for photoelectrochemical applications.