期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 176, 期 18, 页码 1497-1504出版社
ELSEVIER
DOI: 10.1016/j.mseb.2011.09.022
关键词
Photocatalyst; Semiconductors; MgFe2O4/TiO2; Synergetic effect
资金
- National Natural Science Foundation of China [21003109, 21003108]
MgFe2O4/TiO2 (MFO/TiO2) composite photocatalysts were successfully synthesized using a mixing-annealing method. The synthesized composites exhibited significantly higher photocatalytic activity than a naked semiconductor in the photodegradation of Rhodamine B. Under UV and visible light irradiation, the optimal percentages of doped MgFe2O4 (MFO) were 2 wt.% and 3 wt.%, respectively. The effects of calcination temperature on photocatalytic activity were also investigated. The origin of the high level of activity was discussed based on the results of X-ray diffraction, UV-vis diffuse reflection spectroscopy, scanning electron microscopy, transmission electron microscopy, and nitrogen physical adsorption. The enhanced activity of the catalysts was mainly attributed to the synergetic effect between the two semiconductors, the band potential of which matched suitably. (C) 2011 Elsevier B.V. All rights reserved.
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