文献类型：期刊文献

英文题名：Band gap modulation of nanostructured WO₃ nanoplate film by Ti doping for enhanced photoelectrochemical performance

作者：Tang Ya-qin Jiang Di Wang Huan Zheng Hong-ye Ren Lu-jun Wei Kui-xian Ma Wen-hui Dai Yong-nian Luo Da-jun Zhang Xue-liang Liu Yi-ke

第一作者：唐雅琴;Tang Ya-qin

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：Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R 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

外文期刊名：JOURNAL OF CENTRAL SOUTH UNIVERSITY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000871465400010)】；

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：英文

外文关键词：WO3; Ti doping; photoanode; band structure engineering; surface charge separation

摘要：Despite being a promising photoanode material for water splitting, WO3 has low conductivity, high onset potential, and sluggish water oxidation kinetics. In this study, we designed Ti-doped WO3 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 WO3 electrode achieved a photocurrent density of 0.53 mA/cm(2) at 0.6 V (vs Ag/AgCl), 110% higher than that of pure WO3 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 WO3 photoanodes moved upward, yielding a lower onset potential. Furthermore, electrochemical impedance spectroscopy measurements revealed that the conductivities of the WO3 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.