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WO3-modified TiO2 nanotubes for photocatalytic elimination of methylethylketone under UVA and solar light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
26230 43941 2012 15 PDF Available
Title
WO3-modified TiO2 nanotubes for photocatalytic elimination of methylethylketone under UVA and solar light irradiation
Abstract

We report on the synthesis, the characterizations and the photocatalytic activity of WO3/TiO2 nanotubes for methylethylketone (MEK) elimination under both UVA and simulated-solar light irradiations. TiO2 nanotubes (TiNTs) were synthetized using the hydrothermal method in a concentrated 10 M NaOH solution heated at 130 °C during 48 h, post-impregnated with tungstate salt and finally calcined. The photocatalytic efficiency for both UVA and solar light irradiation strongly depends on the WO3 content, ranging from 4 to 51 wt.%. The different photocatalytic activities were analysed, in terms of initial and stabilized activities and deactivation phenomena. Complementary post-tests characterizations (TGA and XPS) aiming at the establishment of correlations between WO3 content, surface composition, surface species and the photocatalytic activity and deactivation are discussed.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Modification of TiO2 nanotubes with WO3 particles. ► UV-A and solar light activation. ► Optimization of the photocatalytic activity of WO3-modified TiO2 nanotubes. ► Influence of WO3 concentration on the activity and on the deactivation phenomena. ► Heterojunction formation between WO3 and TiO2 semiconductors.

Keywords
Photocatalysis; TiO2 nanotubes; WO3 modification; UV-A activation; Solar light activation; Methylethylketone elimination; Semiconductor coupling
First Page Preview
WO3-modified TiO2 nanotubes for photocatalytic elimination of methylethylketone under UVA and solar light irradiation
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 245, 1 October 2012, Pages 43–57
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering