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The CeO 2 /Ag 3 PO 4 photocatalyst with stability and high photocatalytic activity under visible light irradiation
Author(s) -
Song Yanhua,
Zhao Haozhu,
Chen Zhigang,
Wang Weiren,
Huang Liying,
Xu Hui,
Li Huaming
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201533041
Subject(s) - photocatalysis , rhodamine b , x ray photoelectron spectroscopy , materials science , irradiation , photocurrent , visible spectrum , nuclear chemistry , heterojunction , degradation (telecommunications) , precipitation , methylene blue , chemical engineering , catalysis , chemistry , optoelectronics , telecommunications , biochemistry , physics , meteorology , computer science , nuclear physics , engineering
The CeO 2 /Ag 3 PO 4 composite photocatalysts are synthesized by an in situ precipitation method. The XRD, FT‐IR, XPS, TEM, EDS, and DRS are used to characterize the structure of the samples. The photocatalytic performance of the prepared samples is evaluated by the photocatalytic degradation of methylene blue (MB), rhodamine B (RhB), and ciprofloxacin (CIP). The results show that CeO 2 /Ag 3 PO 4 hybrid materials exhibit much higher photocatalytic activity than the Ag 3 PO 4 alone. The optimal CeO 2 content in CeO 2 /Ag 3 PO 4 composites is found to be molar ratio 1 wt%. Photocurrent response of CeO 2 /Ag 3 PO 4 (1 wt%) is about 1.5 times as high as that of the pure Ag 3 PO 4 . The increase of photocatalytic activity of CeO 2 /Ag 3 PO 4 composites could be mainly attributed to the heterojunction between CeO 2 and Ag 3 PO 4 . The trapping experiment has demonstrated that holes serve as the main active species for the degradation of MB under visible light irradiation. A photocatalytic mechanism is also proposed.