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Issue 42, 2013
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A g-C3N4/BiOBr visible-light-driven composite: synthesis via a reactable ionic liquid and improved photocatalytic activity

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Abstract

g-C3N4/BiOBr composite photocatalysts have been synthesized in the presence of the reactable ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C16mim]Br). The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, electrochemical impedance spectroscopy (EIS), and photocurrent analysis. During the reaction process, the ionic liquid [C16mim]Br acted as solvent, reactant, template and dispersing agent at the same time, leading the g-C3N4 to disperse well on the surface of the BiOBr flower-like microspheres. The photocatalytic ability of the as-prepared photocatalysts was evaluated using rhodamine B (RhB) as a target pollutant. The photocatalysts exhibited a significantly enhanced photocatalytic performance in the degradation of RhB. The results of PL, EIS, and photocurrent tests indicated that g-C3N4 combined and dispersed well on the surface of BiOBr which facilitated electron–hole separation, and led to the increased photocatalytic activity. The optimal g-C3N4 content for the photocatalytic activity of the g-C3N4/BiOBr composites was determined. Radical trap experiments certified that the hole was the main reactive species for the photocatalytic degradation of RhB. A possible mechanism of g-C3N4 for the enhancement of visible light performance was proposed.

Graphical abstract: A g-C3N4/BiOBr visible-light-driven composite: synthesis via a reactable ionic liquid and improved photocatalytic activity

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Supplementary files

Article information


Submitted
09 May 2013
Accepted
25 Jul 2013
First published
31 Jul 2013

RSC Adv., 2013,3, 19624-19631
Article type
Paper

A g-C3N4/BiOBr visible-light-driven composite: synthesis via a reactable ionic liquid and improved photocatalytic activity

J. Di, J. Xia, S. Yin, H. Xu, M. He, H. Li, L. Xu and Y. Jiang, RSC Adv., 2013, 3, 19624
DOI: 10.1039/C3RA42269K

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