Ag-Functionalized CuWO4/WO3 nanocomposites for solar water splitting

被引：30
|
作者：
Salimi, R. [1 ,2 ,3 ]
Alvani, A. A. Sabbagh [1 ,2 ]
Mei, B. T. [3 ]
Naseri, N. [4 ,5 ]
Du, S. F. [6 ]
Mul, G. [3 ]
机构：
[1] Amirkabir Univ Technol, Color & Polymer Res Ctr, Tehran Polytech, POB 15875-4413, Tehran, Iran
[2] Amirkabir Univ Technol, Dept Polymer Engn & Color Technol, Tehran Polytech, POB 15875-4413, Tehran, Iran
[3] Univ Twente, MESA Inst Nanotechnol, Fac Sci & Technol, Photocatalyt Synth Grp, Enschede, Netherlands
[4] Sharif Univ Technol, Dept Phys, Tehran, Iran
[5] Inst Res Fundamental Sci, Condensed Matter Natl Lab, Tehran, Iran
[6] Univ Birmingham, Sch Chem Engn, Birmingham, W Midlands, England
来源：
NEW JOURNAL OF CHEMISTRY | 2019年 / 43卷 / 05期
关键词：
PHOTOELECTROCHEMICAL PERFORMANCE; HETEROJUNCTION PHOTOANODES; OXYGEN VACANCIES; CHARGE-TRANSFER; GRAPHENE OXIDE; PARTICLE-SIZE; THIN-FILMS; TIO2; OXIDATION; COMPOSITE;
D O I：
10.1039/c8nj05625k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ag-Functionalized CuWO4/WO3 heterostructures were successfully prepared via a polyvinyl pyrrolidone (PVP)-assisted sol-gel (PSG) route. Thin films prepared via electrophoretic deposition were used as photoanodes for photoelectrochemical (PEC) water splitting. Compared to pristine CuWO4 and WO3 films, a significant enhancement of the photocurrent (3-4 times) at the thermodynamic potential for oxygen evolution (0.62 V vs. Ag/AgCl, pH 7) was obtained for the Ag-functionalized CuWO4/WO3 photoanodes. The obtained enhancement is shown to be derived from a synergic contribution of heterostructure formation (CuWO4/WO3) and improvements of light utilization by Ag-induced surface plasmon resonance (SPR) effects. Accordingly, a photocurrent of 0.205 mA cm(-2) at 0.62 V vs. Ag/AgCl under neutral conditions (without hole scavengers) under front-side simulated AM1.5G illumination was achieved. A detailed analysis of the obtained PEC data alongside performed impedance measurements suggests that charge seperation is significantly improved for the prepared Ag-functionalized CuWO4/WO3 photoanodes. Our work offers beneficial insights to design new plasmonic metal/heterostructured nanocomposites for energy conversion applications.
引用
收藏
页码：2196 / 2203
页数：8
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