文献类型：期刊文献

中文题名：Ti掺杂的WO3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 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：Tang, Ya-qin;唐雅琴

机构：[1] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; [2] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

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

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：EI(收录号：20224313007804)

语种：中文

外文关键词：Chlorine compounds - Electrochemical impedance spectroscopy - Fluorine compounds - Image enhancement - Nanocomposites - Nanostructures - Tin oxides - X ray photoelectron spectroscopy

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/cm2 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. ? 2022, Central South University.