Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 69, Issue 3-4, Pages 138-144Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2006.06.015
Keywords
photocatalysis; titanium dioxide; degradation; preparation; low temperature
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A visible-light-active TiO2 photocatalyst was prepared through carbon doping by using glucose as carbon source. Different from the previous carbon-doped TiO2 prepared at high temperature, our preparation was performed by a hydrothermal method at temperature as low as 160 degrees C. The resulting photocatalyst was characterized by XRD, XPS, TEM, nitrogen adsorption, and UV-vis diffuse reflectance spectroscopy. The characterizations found that the photocatalyst possessed a homogeneous pore diameter about 8 nm and a high surface area of 126 m(2)/g. Comparing to undoped TiO2, the carbon-doped TiO2 showed obvious absorption in the 400-450 nm range with a red shift in the band gap transition. It was found that the resulting carbon-doped TiO2 exhibits significantly higher photocatalytic activity than the undoped counterpart and Degussa P25 on the degradation of rhodamine B (RhB) in water under visible light irradiation (lambda > 420 nm). This method can be easily scaled up for industrial production of visible-light driven photocatalyst for pollutants removal because of its convenience and energy-saving. (c) 2006 Elsevier B.V. All rights reserved.
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