期刊
ELECTROCHIMICA ACTA
卷 56, 期 1, 页码 620-625出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.06.025
关键词
Tungsten trioxide; Self-organized nanoporous film; Voltage stepping anodization; Photoelectrochemical property; Electronic conductivity
资金
- National Nature Science Foundation of China [51072232]
- National Natural Science Foundation of China [20833009]
Visible light-responsive WO3 nanoporous films with preferential orientation of the (0 0 2) planes were prepared by anodization in neutral F-similar to-containing strong electrolytes. The pore diameter of the self-organized structure was estimated to be in the region of 70-90 nm. Voltages were applied by stepping, which positively influenced passivity breakdown and played a significant role in the formation of self-organized nanoporous films. Under visible light irradiation, the photocurrent density (at 1.6 V vs. Ag/AgCl) and maximum photoconversion efficiency generated by the annealed nanoporous film were 3.45 mA/cm(2) and 0.91%, respectively. The annealed nanoporous WO3 films show maximum incident photon-to-current conversion efficiency of 92% at 340 nm at 1.2 V vs. Ag/AgCl. These values are higher than that of annealed compact WO3 film due to the large interfacial heterojunction area. The photoelectrochemical activities and electronic conductivities were also enhanced by annealing crystallization, which removed the recombination centers. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据