Simple and facile ultrasound-assisted fabrication of Bi2O2CO3/g-C3N4 composites with excellent photoactivity

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:497

Article

Ma, Yongjin¹  Bian, Yuan¹  Tan, Pengfei¹  Shang, Yanyang¹  Liu, Yi¹  Wu, Laidi¹  Zhu, Anquan¹  Liu, Wenwen¹  Xiong, Xiang¹  Pan, Jun¹ 

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

关键词: Ultrasonic assisted method;    Bi2O2CO3/g-C3N4 composites photocatalyst;    Visible light;    Photodegradation;    Photocurrent density;   

DOI  :  10.1016/j.jcis.2017.03.010

来源: Elsevier

【 摘 要 】

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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