Journal
CARBON
Volume 54, Issue -, Pages 460-471Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.12.002
Keywords
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Funding
- Venezuelan Ministry of Science and Technology
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N-containing carbon materials were obtained from waste plum stones submitted to pyrolysis under Ar flow at 700 degrees C or to activation under steam at 800 degrees C and enriched with nitrogen by heating in a NH3/air mixture at 270 degrees C or in NO at 300 degrees C. In situ mixtures of TiO2 and carbons were prepared by the slurry method and methylene blue photodegradation was chosen as a model reaction to verify the influence of N-containing carbons on the photocatalytic activity of TiO2 under artificial visible light irradiation. From the kinetics of methylene blue degradation an important synergy effect between both solids was detected with a remarkable increase up to a factor of 5.3 higher in the photocatalytic activity on TiO2-C than that on TiO2 alone. A mechanism for the photoassisting role of N-containing carbons upon the photoactivity of TiO2 under visible light is discussed. (C) 2012 Elsevier Ltd. All rights reserved.
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