期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 10, 页码 3873-3880出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.05.120
关键词
Composites; Chemical synthesis; Catalytic properties
资金
- Natural Science Foundation of China [51172086, 51272081]
- Natural Science Foundation of Anhui Province [1308085QB42]
- Natural Science Foundation of Educational Committee of Anhui Province [KJ2012Z356, KJ2013B241]
Novel Ag/AgBr/g-C3N4 composite photocatalysts were constructed via deposition-precipitation method and extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and UV-vis diffuse reflectance spectroscopy (DRS). Under visible light (lambda > 420 nm), Ag/AgBr/g-C3N4 composite photocatalysts displayed much higher photocatalytic activities than those of Ag/AgBr and g-C3N4 for degradation of methyl orange (MO). 50% Ag/AgBr/g-C3N4 presented the best photocatalytic performance, which was mainly attributed to the synergistic effects of AgBr/g-C3N4 interface and the in situ metallic Ag nanoparticles for efficiently separating electron-hole pairs. Furthermore, Ag/AgBr/g-C3N4 remained good photocatalytic activity through 5 times of cycle experiments. Additionally, the radical scavengers experiment indicated that O-center dot(2)- was the main reactive species for the MO degradation under visible light. (c) 2013 Elsevier Ltd. All rights reserved.
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