期刊
CHINESE JOURNAL OF CATALYSIS
卷 41, 期 3, 页码 464-473出版社
ELSEVIER
DOI: 10.1016/S1872-2067(19)63474-1
关键词
BiOCl-Bi12O17Cl2; Nanocomposite; Green technology; Visible-light photocatalysis
资金
- National Water Pollution Control and Treatment Science and Technology Major Project [2018ZX07110003]
- Key Research and Development Project of Shandong Province [2018CXGC1007]
A BiOCl-Bi12O17Cl2 nanocomposite with a high visible-light response and a low photoinduced electron-hole pair recombination rate was successfully synthesized using an ultrasonic-hydrothermal method. The texture, structure, optical, and photocatalytic properties of the composite were characterized. The results showed that the composite had a sheet flower-like structure with a large specific surface area. Ultraviolet-visible diffuse reflection spectra and photoluminescence spectra showed that the composite had an excellent visible-light response and a low recombination rate of photoinduced electron hole pairs. The photocatalytic property of the composite was evaluated by the removal efficiency of rhodamine B and ciprofloxacin under visible-light illumination. The composite's reaction rate constant of removing rhodamine B (/ciprofloxacin) was approximately 8.14 (/4.94), 42.63 (/11.91) and 64.66 (/36.07) times that of Bi12O17Cl2, P25, and BiOCl, respectively. Furthermore, the composite showed a wide applicable pH range and excellent reusability. Mechanism analysis showed that photogenerated holes played a dominant role and center dot O-2- also contributed to photocatalytic degradation. In summary, this study presents a high-efficiency photocatalyst for wastewater treatment. (C) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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