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Sol-Gel Preparation, Characterization and Photocatalytic Activity of Nanostructured TiO2 Nanoparticles

Published online by Cambridge University Press:  31 January 2012

R. Carrera  and
S. Castillo
R. Carrera*
Affiliation:
Sección de Estudios de Posgrado e Investigación, Instituto Politécnico Nacional, 07738 D.F. México
S. Castillo
Affiliation:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, 07738 D.F., México
*
*Email: [email protected]
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Abstract

To establish a promising method for the purification of air containing volatile organic compounds, TiO2 nanoparticles with interesting physicochemical properties were prepared by the sol-gel method to perform the photocatalytic decomposition of acetaldehyde. The obtained samples were characterized by the x-ray diffraction -Rietveld refinement, transmission electron microscopy (TEM) and the Brunauer, Emmet and Teller (BET) model. According to the results, the sample that presented the highest activity (96.4%) in the photocatalytic oxidation of acetaldehyde was the one annealed at 200 °C. This material showed the presence of a mixture of the anatase (higher proportion) and brookite phases, nanometric crystal size (7.03 nm) and high surface area (189 m2g-1). The physicochemical properties present in the TiO2-P-200°C nanoparticles suggest that they may establish a photoassisted reaction process for air purification, in which volatile organic compounds are photocatalitically decomposed.

Keywords

Tisol-gelcrystalx-ray diffraction (XRD)transmission electron microscopy (TEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1372: Symposium S3 – Structural and Chemical Characterization of Metal Alloys and Compounds—2011 , 2012 , imrc-1372-s3-p15
Copyright
Copyright © Materials Research Society 2012

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