Citation: Xiong Ma, Kaiyi Chen, Bin Niu, Yan Li, Lei Wang, Jingwei Huang, Houde She, Qizhao Wang. Preparation of BiOCl_0.9I_0.1/β-Bi₂O₃ composite for degradation of tetracycline hydrochloride under simulated sunlight[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1535-1543. doi: S1872-2067(19)63486-8 shu

Preparation of BiOCl_0.9I_0.1/β-Bi₂O₃ composite for degradation of tetracycline hydrochloride under simulated sunlight

Xiong Ma ^b, ,
Kaiyi Chen ^a ,
Bin Niu ^b ,
Yan Li ^b ,
Lei Wang ^b ,
Jingwei Huang ^b ,
Houde She ^b ,
Qizhao Wang ^a,b

a School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang'an University, Xi'an 710064, Shanxi, China;
b College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, China

Received Date: 25 February 2020
Revised Date: 29 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (21663027, 21808189), the Science and Technology Support Project of Gansu Province (1504GKCA027), the Fundamental Research Funds for the Central Universities of Chang'an University (300102299304), the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (LYJ18205).

A novel and effective BiOCl_0.9I_0.1/x%β-Bi₂O₃ composite catalyst was synthesized through a precipitation method. The structure, morphology, and optical properties of the samples were certified by X-ray diffraction, UV-Vis diffuse reflectance, scanning electron microscopy, and X-ray photoelectron spectroscopic characterizations. Photocatalytic experiments demonstrated that the synthesized BiOCl_0.9I_0.1/x%β-Bi₂O₃ composite catalyst exhibited excellent photocatalytic performance toward the degradation of tetracycline hydrochloride (TCH) under simulated sunlight. Furthermore, the TCH degradation rate of BiOCl_0.9I_0.1/15%β-Bi₂O₃ increased by 27.6% and 61.4% compared with those of the pure BiOCl_0.9I_0.1 and pure β-Bi₂O₃, respectively. Due to the multiple vacancies and valence states possessed by BiOCl_0.9I_0.1/x%β-Bi₂O₃, namely Bi⁵⁺, Bi^(3-x)+, Bi⁵⁺-O, Bi³⁺-O, I^- and I₃^-, the charge separation in photocatalysis reactions can be effectively promoted. The Mott-Schottky measurements indicate that the conduction band (CB) level of BiOCl_0.9I_0.1/15%β-Bi₂O₃ becomes more negative relative to that of BiOCl_0.9I_0.1, guaranteeing an advantageous effect on the redox ability of the photocatalyst. This study provides a new bright spot for the construction of high-performance photocatalysts.
- BiOCl_0.9I_0.1/β-Bi₂O₃,
- Degradation,
- Tetracycline hydrochloride,
- Photocatalysis,
- Simulated sunlight
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Preparation of BiOCl_0.9I_0.1/β-Bi₂O₃ composite for degradation of tetracycline hydrochloride under simulated sunlight