期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 584, 期 -, 页码 180-184出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.08.203
关键词
Porous microsphere; TiO2; Graphene; Photocatalysis; Ultrasonic spray pyrolysis
资金
- National Natural Science Foundation of China [51072032, 51102001]
- National Basic Research Program [2012CB933703]
- Program for New Century Excellent Talents in University [NECT-10-0320]
- Fundamental Research Funds for the Central Universities [12SSX M001]
- 111 project [B13013]
- International Science and Technology Cooperation Program of China [2013DFG50150]
TiO2-graphene porous microspheres were prepared by ultrasonic spray pyrolysis (USP) of aqueous suspension of graphene oxide containing TiO2 nanoparticles (Degussa P25). The composite microspheres were characterized with SEM, XPS, photoluminescence, Raman and UV-Vis absorption spectra. TiO2-graphene porous microspheres displayed higher photocatalytic activity for the degradation of methylene blue solution than pristine TiO2 microspheres under the irradiation of Xe lamp, and the highest activity was obtained at a weight percentage of graphene around 1%. The effect of graphene on photocatalytic activity of porous microsphere was discussed in terms of the enhanced charge separation by TiO2-graphene heterojunction, increased absorption of the visible light, as well as the possible hindrance of mass transportation in microspheres. (C) 2013 Elsevier B. V. All rights reserved.
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