Core–shell CoTiO3@MnO2 heterostructure for the photothermal degradation of tetracycline.

Autor: Yang, Xia, Wei, Songrui, Ma, Xilong, Gao, Zhuwei, Huang, Wei, Wang, Dun, Liu, Zhongxin, Wang, Jieqiong
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Zdroj: Journal of Materials Science; Feb2023, Vol. 58 Issue 8, p3551-3567, 17p, 1 Color Photograph, 3 Diagrams, 6 Graphs
Abstrakt: The photothermal process exhibits the largest energy conversion efficiency among all solar energy utilization processes. In this study, a core–shell CoTiO3@MnO2 (CTM) composite photothermal catalyst was synthesized by supporting MnO2 on CoTiO3 by hydrothermal synthesis. Binding to peroxymonosulfate (PMS) heterogeneous catalyst removed tetracycline in wastewater. The new catalyst was characterized by FT-IR, UV–Vis, XRD, BET, SEM, TEM, and so on. Kinetic analysis showed that CTM activated PMS at a rate of 3.2 and 3.5 times higher than that of pure light and heat conditions, with complete degradation of tetracycline (TC). Since the outer MnO2 layer converted the absorbed solar energy into thermal energy, PMS was activated to generate active species while performing electron transfer, which resulted in a considerably improved catalytic efficiency. To prove the wide applicability of the catalyst, other pollutants were degraded, including bisphenol A (BPA), metronidazole (MNZ), and methyl orange (MO). The three pollutants were degraded within 40 min. Finally, our findings demonstrated the mechanism of the photothermal degradation process and provided a novel approach for environmental remediation using renewable solar energy. In this paper, the degradation efficiency of CoTiO3 was improved by loading MnO2 on CoTiO3. Binding to peroxymonosulfate (PMS) heterogeneous catalyst activation for the catalytic degradation of tetracycline. It was found by experiments that the core-shell structure of the composite material CoTiO3@MnO2 had better photothermal catalysis efficiency than photocatalysis and thermal catalysis. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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