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Deposition of TiO2 and Ag:TiO2 thin films by the polymeric precursor method and their application in the photodegradation of textile dyes

Paper ID Volume ID Publish Year Pages File Format Full-Text
47955 46486 2009 8 PDF Available
Title
Deposition of TiO2 and Ag:TiO2 thin films by the polymeric precursor method and their application in the photodegradation of textile dyes
Abstract

This paper describes the development of nanostructured thin films of TiO2 and Ag:TiO2 with different Ag loading content and with various number of layers by the polymeric precursor method, in order to test them in the photocatalysis of the degradation of textile dyes, using rhodamine B as a standard. Analysis of the films showed that the adopted method could be used to synthesize pure anatase and the silver-decorated phase. Moreover, 0.25% Ag:TiO2 thin film showed enhanced photocatalytic efficiency. The tests with film of different thickness showed that for pure TiO2, the increase in film thickness was the only factor responsible for improving the photocatalytic activity, whereas for the Ag:TiO2 thin films, the increase in photocatalytic activity was related to associate effects: the electron transfer from TiO2 to Ag, reducing the electron–hole recombination, and the increase in film thickness.

Keywords
Thin films; Titanium dioxide; Photodegradation; Rhodamine B
First Page Preview
Deposition of TiO2 and Ag:TiO2 thin films by the polymeric precursor method and their application in the photodegradation of textile dyes
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 90, Issues 1–2, 25 July 2009, Pages 205–212
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis