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Enhancement of the Photoelectrochemical Performance of WO3 Vertical Arrays Film for Solar Water Splitting by Gadolinium Doping

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成果类型:
期刊论文
作者:
Liu, Yang;Li, Jie;Li, Wenzhang*;Yang, Yahui;Li, Yaomin;Chen, Qiyuan
通讯作者:
Li, Wenzhang
作者机构:
[Li, Jie; Liu, Yang; Li, Wenzhang; Chen, Qiyuan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
[Yang, Yahui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
[Li, Yaomin] UCL, Dept Chem, London WC1H 0AJ, England.
通讯机构:
[Li, Wenzhang] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
语种:
英文
期刊:
Journal of Physical Chemistry C
ISSN:
1932-7447
年:
2015
卷:
119
期:
27
页码:
14834-14842
基金类别:
National High Technology Research and Development Program of China (863 Program) [2011AA050528]; National Nature Science Foundation of China [51304253]; Hunan Provincial Natural Science Foundation of China [13JJ6003]; Fundamental Research Funds for the Central Universities [2012QNZT12]; Open-End Fund for the Valuable and Precision Instruments of Central South University
机构署名:
本校为其他机构
院系归属:
资源环境学院
摘要:
In this study, WO<inf>3</inf>nanoplates modified by doping with gadolinium (Gd) were synthesized by a hydrothermal method. The effect of the rare-earth element on the photoelectrochemical (PEC) performance of WO<inf>3</inf>one- or two-dimensional (2D) materials was examined. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction were employed to examine the crystal phase and morphology of the Gd-doped nanoplates thus prepared. Results of UV-vis spectroscopy, valence-band (VB) X-ray photoelectron spectroscopy, and Mott-Schottky analyses indicated that the conduction band and VB potentials of WO<inf>3</inf>shifted to negative values. Linear sweep voltammetry results indicated that the photocurrent density increased by 153% after modification by doping with Gd. In addition, the PEC properties of the WO<inf>3</inf>nanoplates obtained by the intensity-modulated photocurrent spectrum and incident photon-to-current conversion efficiency measurements indicated that modification by doping with Gd has a scintillating application in improving the PEC conversion properties of WO<inf>3</inf>-based 2D materials. ©2015 American Chemical Society.

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