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International Journal of Photoenergy
Volume 2017, Article ID 3079276, 9 pages
Research Article

Silver/Carbon Codoped Titanium Dioxide Photocatalyst for Improved Dye Degradation under Visible Light

1Department of Pure & Applied Chemistry, University of Fort Hare, P. Bag X1314, Alice 5700, South Africa
2Fort Hare Institute of Technology, University of Fort Hare, P. Bag X1314, Alice 5700, South Africa
3Chemistry Department, University of the Western Cape, P. Bag X17, Bellville 7535, South Africa

Correspondence should be addressed to P. Nyamukamba;

Received 2 October 2016; Revised 9 December 2016; Accepted 15 December 2016; Published 11 January 2017

Academic Editor: Leonardo Palmisano

Copyright © 2017 P. Nyamukamba 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.


Herein, we report the synthesis of quartz supported TiO2 photocatalysts codoped with carbon and silver through the hydrolysis of titanium tetrachloride followed by calcination at 500°C. The prepared samples were characterized by UV-Vis diffuse reflectance spectroscopy, high resolution scanning electron microscopy (HRSEM), Raman spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Codoping of TiO2 with Ag and carbon resulted in an increase in the surface area of the photocatalyst and altered the ratio of the anatase to rutile phase. The absorption edge of all the doped TiO2 photocatalysts redshifted and the band gap was reduced. The lowest band gap of 1.95 eV was achieved by doping with 0.5% Ag. Doping TiO2 using carbon as the only dopant resulted in a quartz supported photocatalyst that showed greater photocatalytic activity towards methyl orange than undoped TiO2 and also all codoped TiO2 photocatalysts under visible light irradiation.