Bi<sub>2</sub>WO<sub>6</sub>/MIL-101光催化降解水中四环素的性能与机理

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Abstract The Bi₂WO₆/MIL-101composite photocatalysts were synthesized via a hydrothermal method to facilitate the degradation of tetracycline (TC) under visible light. Research findings demonstrated that the TC degradation efficiency of Bi₂WO₆ under visible light was significantly enhanced following the dense growth of BWO nanosheets on the surface of MIL-101. Furthermore, the structurally optimized BWO/MIL-101-40exhibited a TC degradation efficiency of 85.9% within 60minutes, with a reaction rate constant approximately 1.4 times that of Bi₂WO₆ and 3.1times that of MIL-101. Additionally, BWO/MIL-101 displayed consistent and robust photocatalytic performance in neutral and alkaline conditions. Band structure analysis revealed the formation of type II heterojunctions between Bi₂WO₆ and MIL-101, contributing to effective photoelectron-hole separation. Quenching experiments and electron paramagnetic resonance (EPR) tests indicated superoxide radical (•O₂^-) and holes (h⁺) as the primary active species in this particular photocatalytic system.

Key words： bismuth tungstate metal-organic framework tetracycline photocatalysis heterojunction

Received: 03 January 2024

PACS:

X703.5

Corresponding Authors: 吕健,教授,jian_lu_fafu@163.com;何秋香,高级实验师,hqx1406@fafu.edu.cn E-mail: jian_lu_fafu@163.com;hqx1406@fafu.edu.cn

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	Articles by authors
	CAI Feng-ying
	XU Yu-hang
	LONG Hao-ran
	YUAN Yu-xin
	ZHANG Yu-qing
	HE Qiu-xiang
	Lü Jian

Cite this article:

CAI Feng-ying,XU Yu-hang,LONG Hao-ran等. Performance and mechanism of photocatalytic tetracycline degradation by Bi₂WO₆/MIL-101in water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4652-4660.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I8/4652

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