Journal
APPLIED SURFACE SCIENCE
Volume 427, Issue -, Pages 1046-1053Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2017.09.106
Keywords
Gd-doped Bi2MoO6; Pt nanoparticles; Radicals; Photocatalysis
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Funding
- National Natural Science Foundation of China [21271022]
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A new Pt nanoparticles decorated Gd-doped Bi2MoO6 photocatalyst was synthesized by the hydrothermal process and in-situ reduction method. The crystal structure, morphology, chemical state and optical property of the obtained photocatalysts were investigated. The activities of photocatalysts were also evaluated by the degradation of Rhodamine B, Tetracyclines and 4-Chlorophenol under visible light irradiation, and the results indicated that the Gd/Pt co-modified Bi2MoO6 sample shows better photocatalytic activity. Meanwhile, the results of trapping experiments and Electron Spin Resonance (ESR) spectra demonstrated that the (OH)-O-center dot radicals can be formed by doping of Gd3+ ions, and the addition of Pt was conducive to the producing of more center dot O-2(-) and (OH)-O-center dot radicals. Also the results from the degradation of 4-chlorophenol implied that the formed (OH)-O-center dot radicals in the system of Gd/Pt-BMO possess stronger oxidizability than center dot O-2(-) radicals for degrading the special organics which are difficult to be mineralized. Additionally, the mechanism about the excellent photocatalytic activity of Gd/Pt co-modified Bi2MoO6 was also discussed. (C) 2017 Elsevier B.V. All rights reserved.
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