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题名: Investigation of adsorption and photocatalytic activities of in situ cetyltrimethylammonium bromide-modified Bi/BiOCl heterojunction photocatalyst for organic contaminants removal
作者: Li, Wentao; Xiao, Feng; Su, Hang; Wang, Dongsheng; Yang, Xiaofang
刊名: RSC ADVANCES
出版日期: 2016
卷号: 6, 期号:96, 页码:93309-93317
DOI: 10.1039/c6ra19904f
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: Bi/BiOCl heterojunction was prepared via a hydrothermal method, using cetyltrimethylammonium bromide (CTAB) as a stabilizing agent. The structure and chemical properties of Bi/BiOCl with the three different CTAB contents were thoroughly analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), field-emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectra (UV-vis DRS), zeta potential, and carbon element analysis, the results indicates that there are some important interactions between CTAB and Bi/BiOCl, resulting in decreasing the band gap of Bi/BiOCl with the increase of CTAB content. Two typical dyes, rhodamine B (RhB) and methyl orange (MO) which has different surface charges, were choosed as the target pollutants. Under the visible light (lambda = 420 nm), the photocatalytic efficiency of Bi/BiOCl with a higher CTAB (Bi/BiOCl-a) was 3.72-fold more than that of Bi/BiOCl with a lower CTAB (Bi/BiOCl-c) to remove RhB. Bi/BiOCl heterojunction alone exhibited a poor degradation capability for the MO such as 5% of MO photodegradation with Bi/BiOCl-c. In contrast, MO removal efficiency by the Bi/BiOCl-a was 100%. Hence, the CTAB could play an important role to enhance the removal of dyes. Firstly, CTAB could absorb the target pollutants near the surface of Bi/BiOCl due to the electrostatic attraction and dispersion interaction; then Bi/BiOCl could degrade the pollutants via the in situ h(+) or center dot O2- under the visible light. The proposed mechanism was supported by the FTIR and adsorption analysis.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36193
Appears in Collections:中国科学院饮用水科学与技术重点实验室_期刊论文

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Recommended Citation:
Li, Wentao,Xiao, Feng,Su, Hang,et al. Investigation of adsorption and photocatalytic activities of in situ cetyltrimethylammonium bromide-modified Bi/BiOCl heterojunction photocatalyst for organic contaminants removal[J]. RSC ADVANCES,2016,6(96):93309-93317.
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文件名: Investigation of adsorption and photocatalytic activities of in situ cetyltrimethylammonium bromide-modified BiBiOCl heterojunction photocatalyst for organic contaminants removal.pdf
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