Anodic growth of nanoporous WO3 films:: Morphology, photoelectrochemical response and photocatalytic activity for methylene blue and hexavalent chrome conversion

被引：117

作者：

Watcharenwong, Apichon ^{[2
]}

Chanmanee, Wilaiwan ^{[2
]}

de Tacconi, Norma R. ^{[1
]}

Chenthamarakshan, C. Ramannair ^{[1
]}

Kajitvichyanukul, Puangrat ^{[3
]}

Rajeshwar, Krishnan ^{[1
]}

机构：

[1] Univ Texas Arlington, CREST, Dept Chem & Biochem, Arlington, TX 76019 USA

[2] Chulalongkorn Univ, Natl Res Ctr Environm & Hazardous Waste Managemen, Bangkok, Thailand

[3] King Mongkuts Univ Technol Thonburi, Dept Environm Engn, Fac Engn, Bangkok, Thailand

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2008年 / 612卷 / 01期

关键词：

semiconductor; photocatalysis; electrosynthesis; anodization; solar energy conversion; electrodeposition;

D O I：

10.1016/j.jelechem.2007.09.030

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This study first probes the relationship between the morphology of anodic tungsten(VI) oxide (WO3) layers grown on tungsten foil substrates and their subsequent photoelectrochemical response in 0.5 M Na2SO4 supporting electrolyte. The effects of anodization variables (voltage and time) and anodization medium composition [poly(ethylene glycol), ethylene glycol] on the oxide layer morphology and photoresponse are described. Selected anodic samples were then tested for their photocatalytic activity using methylene blue and hexavalent chromium as probes. Kinetics parameters are presented from data on the dye using variant concentrations and analyzed within the framework of the Langmuir-Hinshelwood model. The anodic nanoporous WO3 showed better photocatalytic activity for the reductive conversion of Cr(VI) when compared with a cathodically electrosynthesized film counterpart. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：112 / 120

页数：9

共 62 条

[21] SEMICONDUCTOR ELECTRODES .10. PHOTOELECTROCHEMICAL BEHAVIOR OF SEVERAL POLYCRYSTALLINE METAL-OXIDE ELECTRODES IN AQUEOUS-SOLUTIONS [J].