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International Journal of Photoenergy
Volume 2014 (2014), Article ID 475713, 8 pages
http://dx.doi.org/10.1155/2014/475713
Research Article

Preparation, Characterization, and Photocatalytic Applications of MWCNTs/TiO2 Composite

1Chemistry Department, College of Science, University of Babylon, P.O. Box 51002, Hilla, Iraq
2Institut für Technische Chemie, Leibniz Universität Hannover, Callin Straße 3, 30167 Hannover, Germany

Received 8 July 2014; Accepted 1 August 2014; Published 28 August 2014

Academic Editor: Jiaguo Yu

Copyright © 2014 Ahmed M. Kamil 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

The multiwall carbon nanotubes (MWCNTs)/titanium dioxide (P25) composite in different ratios was prepared using simple evaporation and drying process. The composite was characterized by Raman spectroscopy, X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy, and scanning electron microscopy (SEM). The photocatalytic activity of this composite was investigated using degradation of the Bismarck brown R dye (BBR). An optimal MWCNTs/TiO2 ratio of 0.5% (w/w) was found to achieve the maximum rate of BBR degradation. It was observed that the composite exhibits enhanced photocatalytic activity compared with TiO2. The enhancement in photocatalytic activity performance of the MWCNTs/P25 composite is explained in terms of recombination of photogenerated electron-hole pairs. In addition, MWCNTs act as a dispersing support to control the morphology of TiO2 particles in the MWCNTs/TiO2 composite.