期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 497, 期 -, 页码 144-154出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.03.010
关键词
Ultrasonic assisted method; Bi2O2CO3/g-C3N4 composites photocatalyst; Visible light; Photodegradation; Photocurrent density
资金
- National Science Foundation of China [51302325]
- Science Fund for Distinguished Young Scholars of Hunan Province [2015111016]
- Hunan Youth Innovation Platform [90600-903030005]
- Program for Shenghua Overseas Talent [90600-996010162]
- Project of Innovation-driven Plan in Central South University [201506004]
- National Natural Science Foundation of China [11674398]
Bi2O2CO3/g-C3N4 (BOC/CN) composites photocatalyst was fabricated via a facile ultrasonic-assisted method. The crystal structure, morphology, optical and photocatalytic properties of the as-prepared samples were characterized by various analytical techniques. The results indicated that the Bi2O2CO3 nano flakes grew on the surface of the g-C3N4 nanosheets, forming closely contacted interfaces between the Bi2O2CO3 and the g-C3N4 component. BOC/CN composites with 50 wt% of g-C3N4 showed the optimal photoactivity for the degradation of RhB under visible light, which was approximately 2.2 times higher than that of pure g-C3N4 and 7 times of pure Bi2O2CO3, respectively. The enhanced performance of the BOC/CN composites was mainly attributed to a synergistic effect including the accelerated separation and migration of photogenerated charge carriers, demonstrated by Photoluminescence(PL), electrochemical impedance spectra (EIS) and photocurrent density. Finally, a possible photocatalytic mechanism was proposed based on the experimental results. It is expected that such a facile route method could provide new insights into fabricating other g-C3N4-based composite photocatalysts for environmental remediation. (C) 2017 Elsevier Inc. All rights reserved.
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