F.-J. Zhanga, b, *, F.-Z. Xiea, W.-J. Xiea, and C.-X. Zhuc
aAnhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei Anhui, 230022, P.R. China
bKey Laboratory of Functional Molecule Design and Interface Process, Anhui Jianzhu University,
Hefei Anhui, 230601, P.R. China
cAnhui Province LiTe Environmental Protection Technology Co. Ltd., Hefei Anhui, 230001, P.R. China
*e-mail: zhang-fengjun@hotmail.com
Received May 4, 2015
Abstract—An efficient and simple oil bath method for rapid synthesis of graphene/BiOI as visible light active
photocatalyst was described. The resultant graphene/BiOI composites were characterized by different tech-
niques, including scanning electron microscopy, X-ray diffraction, and ultraviolet-visible diffuse reflectance
spectroscopy. The photocatalytic activity of the as-prepared graphene/BiOI composites for methyl orange deg-
radation was also investigated under visible light irradiation. The results show that BiOI and graphene taken
with a mass ratio of 100 : 1 exhibited the highest photocatalytic efficiency, which is two times that of pure BiOI.
Part of this effect results from higher specific surface area that provides an increased number of active sites. A
relatively narrow band gap (2.08 eV) formed in the heterostructure can also contribute to this effect. A sugges-
tion of the photocatalytic mechanism was also offered.
Keywords: graphene/BiOI composites, oil bath method, photocatalytic degradation, methyl orange, visible light
irradiation
DOI: 10.1134/S0023158416030162
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