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Advances in Materials Science and Engineering
Volume 2013, Article ID 638372, 8 pages
http://dx.doi.org/10.1155/2013/638372
Research Article

Facile Postsynthesis of N-Doped TiO2-SBA-15 and Its Photocatalytic Activity

1Department of Chemistry, Quy Nhon University, Quy Nhon 8456, Vietnam
2Department of Chemistry, Hue University of Education, Hue 8454, Vietnam
3Department of Physics, Hanoi National University of Education, Ha Noi 844, Vietnam

Received 7 May 2013; Accepted 23 July 2013

Academic Editor: Z. Barber

Copyright © 2013 Thu Phuong Tran Thi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

N-doped TiO2-SBA-15 (denoted as N-TiO2-SBA-15) material has been successfully synthesized by a two-step procedure. Firstly, TiO2-SBA-15 was prepared by impregnating tetraisopropyl orthotitanate on SBA-15 and followed by calcination at 550°C. In the second step, TiO2-SBA-15 was modified by doping nitrogen with the assistance of urea. The resulting material, N-TiO2-SBA-15, was characterized by XRD, TEM, SEM, N2 adsorption/desorption at 77 K, DR UV-Vis, and XPS. The results showed that N-TiO2-SBA-15 material maintains its ordered hexagonal mesostructure and exhibits the absorption of visible region. The photocatalytic activity of N-TiO2-SBA-15 sample was evaluated by the photodegradation of methylene blue under visible light.