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

详细信息    查看全文

• 作者：Yang Liu ; Jie Li ; Wenzhang Li ; Yahui Yang ; Yaomin Li ; Qiyuan Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 9, 2015
• 年：2015
• 卷：119
• 期：27
• 页码：14834-14842
• 全文大小：489K
• ISSN：1932-7455

文摘

In this study, WO₃ 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 WO₃ 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鈥搗is spectroscopy, valence-band (VB) X-ray photoelectron spectroscopy, and Mott鈥揝chottky analyses indicated that the conduction band and VB potentials of WO₃ 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 WO₃ 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 WO₃-based 2D materials.