Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 73, Issue 4, Pages 523-529Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2011.11.034
Keywords
Inorganic compounds; Chemical synthesis; X-ray diffraction; Surface properties
Funding
- National Nature Science Foundation of China [21007021, 21177050, 21076099]
- Postdoctoral Foundation of China [20110491354]
- Research Foundation of Jiangsu University [10JDG128]
- Society Development Fund of Zhenjiang [SH2011011, SE2010006]
- Doctoral Innovation Fund of Jiangsu [CX10B-275Z]
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AgBr photocatalysts were prepared with the 1-hexadecyl-3-methylimidazolium bromide ([C(16)mim]Br) reactable ionic liquid at different temperatures by one-step hydrothermal method, in which the ionic liquid acted as a precursor and a template to control the size of AgBr crystal. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), the Brunauer-Emmett-Teller (BET) surface area and diffuse reflectance spectroscopy (DRS). Methyl orange (MO) dye was chosen as a model pollutant to investigate the photocatalytic activity and the stability of the samples under visible light irradiation. The results indicated that the AgBr photocatalysts showed high efficiency in the degradation of MO under visible light irradiation. The kinetic property of the reaction followed the first-order reaction model. During the photocatalytic degradation reaction, AgBr was transformed to the Ae/AgBr composite. However, the photocatalytic efficiency was still high and the photocatalytic activity was stable. The possible photocatalytic mechanism of the photocatalysts was also eventually proposed. (C) 2011 Elsevier Ltd. All rights reserved.
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