MOF-derived biochar composites for enhanced high performance photocatalytic degradation of tetracycline hydrochloride

Liu, Zhiwei, Li, Yi, Li, Chen, Thummavichai, Kunyapat, Feng, Chen, Li, Zhen, Liu, Song, Zhang, Shenghua, Wang, Nannan and Zhu, Yanqiu (2022) MOF-derived biochar composites for enhanced high performance photocatalytic degradation of tetracycline hydrochloride. RSC Advances, 12 (49). pp. 31900-31910. ISSN 2046-2069

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Biochar reinforced advanced nanocomposites are of interest to a wide circle of researchers. Herein, we describe a novel MOF-derived reinforced cow dung biochar composite, which was prepared by a one-step hydrothermal method to form the MOF MIL-125(Ti) onto a nitrogen and sulfur co-doped bio-carbon (NSCDBC). The UV-vis diffuse reflectance spectrum of NSCDBC/MIL-125(Ti) exhibits an extension of light absorption in the visible region (360–800 nm), indicating its higher visible light capture capacity relative to pure MIL-125(Ti). The photocatalytic activity results show that all the NSCDBC/MIL-125(Ti) composite samples, namely NSCM-5, NSCM-10, NSCM-20 and NSCM-30 display good performance in the removal of tetracycline hydrochloride compared to pure MIL-125(Ti). Among them, NSCM-20 exhibits the highest catalytic activity with a removal rate of 94.62%, which is attributed to the excellent adsorption ability of NSCDBC and the ability to inhibit the complexation of photogenerated electron–hole pairs. Photoluminescence verifies that the loading of biochar successfully enhances the separation of photogenerated electron–hole pairs. Subsequently, the active species in the photocatalytic process are identified by using electron spin resonance spin-trap techniques and free radical trapping experiments. Finally, the possible reaction mechanism for the photocatalytic process is revealed. These results confirm that NSCDBC/MIL-125(Ti) is a potentially low-cost, green photocatalyst for water quality improvement.

Item Type: Article
Additional Information: Funding information: This project is supported by National Natural Science Foundation (No. 51972068), Specific Research Project of Guangxi for Research Bases and Talents (No. GuiKe AD19245145), Natural Science Foundation of Guangxi Province (No. 2018GXNSFBA281106 and No. 2021GXNSFBA076003), Guangxi “Bagui” Scholarship Foundation.
Subjects: F100 Chemistry
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 08 Nov 2022 11:50
Last Modified: 08 Nov 2022 12:02

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