Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/2401
Title: Visible-induced photocatalytic reactivity of polymer-sensitized titania nanotube films
Authors: Liang, Hai-chao
Li, Xiang-zhong
Subjects: Polymer
Photosensitizer
Titania nanotubes
Visible photocatalysis
Issue Date: Feb-2009
Publisher: Elsevier
Source: Applied catalysis B: Environmental, Feb. 2009, v. 86, no. 1-2, p. 8-17.
Abstract: In this study, polythiophene–TiO₂ nanotube films (PTh/TNT) were successfully prepared by a two-step electrochemical process of anodization and electropolymerization, in which a highly ordered TiO₂ nanotube (TNT) film was anodized at a low-voltage with post calcination first and then the prepared TNT film was deposited with a polythiophene layer by electropolymerization in the BFEE electrolyte. The morphology and structures of PTh/TNT composites were examined by FESEM, EDX, XRD and XPS methods. XPS spectra of PTh/TNT composites indicate the strong interaction between S sites of polymer backbone and TiO₂ nanotubes, in which electron transfer from polythiophene to titania takes place. UV–vis DRS analysis shows that these composites have a strong photoresponse in the visible region at 500 nm. The prepared PTh/TNT films revealed significant activity for 2,3-dichlorophenols (2,3-DCP) degradation under visible light irradiation and also sunlight irradiation, in which the PTh3/TNT film achieved the best performance. On the other hand, this study also confirmed that the side-chains of polythiophene could influence its photocatalytic activity significantly in an order from high to low as poly3-methylthiophene ≈ polythiophene > polythiophenecarboxylic acid > poly3-hexylthiophene. The results may provide useful information to further develop some effective polymer-semiconductor catalysts for pollutant degradation under sunlight irradiation for water and wastewater treatment.
Rights: Applied catalysis. B, Environmental © 2008 Elsevier. The journal web site is located at http://www.sciencedirect.com.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/2401
DOI: 10.1016/j.apcatb.2008.07.015
ISSN: 0926-3373
Appears in Collections:CEE Journal/Magazine Articles

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