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Plasma Induced Modifications in TiO2 Films

Published online by Cambridge University Press:  05 August 2011

D. A. Gutiérrez ,
F. J. Avila ,
P. Reyes ,
H. Martínez ,
R. Romero  and
R. Natividad
D. A. Gutiérrez
Affiliation:
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carretera Toluca-Atlacomulco Km 14.5, C.P. 50200, Toluca, Estado de México, México
F. J. Avila
Affiliation:
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carretera Toluca-Atlacomulco Km 14.5, C.P. 50200, Toluca, Estado de México, México
P. Reyes
Affiliation:
Facultad de Ciencias, Universidad Autónoma del Estado de México, Instituto Literario 100, Col. Centro, C.P. 50000, Toluca, Estado de México, México
H. Martínez
Affiliation:
Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, A.P. 48-3, C. P. 62251, Cuernavaca, Morelos, México Email: pgrr@uaemex.mx
R. Romero
Affiliation:
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carretera Toluca-Atlacomulco Km 14.5, C.P. 50200, Toluca, Estado de México, México
R. Natividad
Affiliation:
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carretera Toluca-Atlacomulco Km 14.5, C.P. 50200, Toluca, Estado de México, México
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Abstract

Titanium dioxide (TiO2) is an efficient photocatalyst. It is, however, fully activated only under ultraviolet (UV) radiation. Thus some research has been addressed to modify TiO2 so that it becomes sensitive to visible (Vis) light. The aim of this work was to modify the catalytic activation wavelength of TiO2 films by N2 plasma surface treatment. For such a purpose, sol-gel method was used to coat glass substrates with TiO2 films. The films so obtained were characterized by Raman Spectroscopy and SEM. For N2 plasma treatment, the films were exposed to N2 plasma and the effect of exposure time, N2 pressure and electric conditions on TiO2 photocatalytic activity under sunlight was studied. The photocatalytic activity was established via methylene blue (MB) degradation.

Keywords

AbsorptioncatalyticRaman spectroscopyscanning electron microscopy (SEM)sol-gel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1275: Structural and Chemical Characterization of Metals, Alloys and Compounds , 2010 , S3-P93
Copyright
Copyright © Materials Research Society 2010

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