期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 473, 期 -, 页码 112-119出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.03.046
关键词
Bi4O5Br2; Reactable ionic liquid; Bisphenol-A; Photocatalysis
资金
- National Nature Science Foundation of China [21476098, 21471069, 21576123]
- science and technology support program of Zhenjiang [SH2014018]
- Special Financial Grant from the China Postdoctoral Science Foundation [2013T60506]
Novel Bi4O5Br2 photocatalysts were synthesized by a one-pot solvothermal method in the presence of reactable ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C(16)mim]Br). X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS) and other characterizations were applied to investigate their structures, morphologies, optical and electronic properties. Bisphenol-A (BPA) was chosen to evaluate the photocatalytic activity of Bi4O5Br2 nanosheets. After the visible light irradiation, about 91.2% of BPA were removed by Bi4O5Br2 after 3.5 h with the reaction rate constant of 0.01086, which is much higher than that of the pure BiOBr (24.4%). Liquid chromatography combined with mass spectrometry (LC-MS) technique was used to track the intermediates species, showing the photocatalytic mechanism is related to photogenerated holes instead of hydroxyl radicals. The as-prepared Bi4O5Br2 also exhibited excellent stability as well as reusability, implying a great promising practical application for the photodegradation of organic pollutants. (C) 2016 Elsevier Inc. All rights reserved.
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