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CoAl-Layered double hydroxides coupled with BiOCl as Z-Scheme heterostructure for enhanced photocatalytic removal of antibiotic pollutants under visible light

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Abstract

A novel BiOCl/CoAl-LDH direct Z-scheme photocatalyst was successfully designed and fabricated via pH adjustment and solvent thermal method. Owing to the unique energy band structure of BiOCl and CoAl-LDH, the two materials were combined to form a Z-type heterojunctions. Due to the high hydrolysis capacity of Bi3+, the production of composites is regulated by adjusting the pH. The composite with 15% CoAl-LDH (BCA-15) was discovered to have the optimal degradation efficiency by measuring the absorbance. After 140 min of visible light irradiation, 92.49% of tetracycline was degraded. In addition, the BCA-15 composite showed remarkable reusability and stability after five cycles. According to the results of the free radical capture experiment, ·O2− and h+ played essential roles in photocatalytic degradation. Finally, a possible direct Z heterostructure for the degradation of tetracycline was proposed. The composite with 15% CoAl-LDH would be beneficial to the control of water pollution and the treatment of the surrounding environment.

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Funding

Funding was provided by The National Natural Science Foundation of China (program no. 21978328).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Central South University, 410083, Changsha, People’s Republic of China

    Lixu Wu, Youcai Liu, Yinke Wang, Chun Sun, Guoqing Zhao, Jun Hu, Xinqi Long & Feipeng Jiao

  2. The Second Xiangya Hospital, Central south University, 410011, Changsha, Hunan, China

    Hongtao Wu

  3. Jiangsu World Top Thermal Technology Co., Ltd, Yancheng, Jiangsu, China

    Hang Zhang

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  1. Lixu Wu
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LW Investigation, Methodology, Writing – original draft. YL Investigation. YW Methodology, Writing – review & editing. CS Investigation. GZ Data curation. JH Data curation. XL Conceptualization. HZ Supervision. HW Supervision. Feipeng Jiao:Funding acquisition, Supervision, Writing – review & editing.

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Wu, L., Liu, Y., Wang, Y. et al. CoAl-Layered double hydroxides coupled with BiOCl as Z-Scheme heterostructure for enhanced photocatalytic removal of antibiotic pollutants under visible light. J Mater Sci: Mater Electron 33, 19092–19106 (2022). https://doi.org/10.1007/s10854-022-08746-0

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