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J Colloid Interface Sci. 2017 Mar 15;490:812-818. doi: 10.1016/j.jcis.2016.12.007. Epub 2016 Dec 8.

BiOBr/BiOF composites for efficient degradation of rhodamine B and nitrobenzene under visible light irradiation.

Author information

1
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
2
Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: yanggao@ecust.edu.cn.
3
School of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing 408100, China.
4
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China. Electronic address: tlu@phy.ecnu.edu.cn.

Abstract

BiOBr/BiOF (BF) composites were successfully synthesized via a facile one-step hydrothermal method for the first time. The structures, morphologies and photocatalytic performances of BF composites were characterized by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, UV-vis absorption spectroscopy, X-ray photoelectron spectroscopy, photoluminescence spectroscopy and electrochemical impedance spectroscopy respectively. The results show that the BF composites exhibit enhanced photocatalytic performances in the degradation of RhB and nitrobenzene with maximum degradation rates of 100% (25min) and 94% (300min) under visible light irradiation, respectively. The improved photocatalytic performance is mainly ascribed to the small crystalline size and the reduced electron-hole pair recombination with the presence of BiOF in the composites. Furthermore, the photodegradation mechanism was investigated and the h+ and OH radicals are suggested to be the main active species for photocatalytic degradation of RhB and nitrobenzene.

KEYWORDS:

BiOBr/BiOF composites; Nitrobenzene; Photocatalysis; Rhodamine B

PMID:
27997849
DOI:
10.1016/j.jcis.2016.12.007

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