尿素改性Bi<sub>2</sub>MoO<sub>6</sub>摩擦催化氧化降解罗丹明B

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Abstract Urea modified Bi₂MoO₆ (Urea-Bi₂MoO₆) catalyst was prepared by a hydrothermal method, and its microstructure was characterized by SEM, XRD, XPS, BET, etc. The crystallinity of Bi₂MoO₆ modified by urea was improved, and it exhibited excellent frictional catalytic performance. Under the conditions of a rotational speed of 700r/min, RhB initial concentration of 5mg/L, catalyst dosage of 1g/L, and 35mm PTFE magnetic particles, the degradation of RhB reached 99.02% after 300min. The friction catalyzed oxidation degradation of RhB by Urea-Bi₂MoO₆ followed first-order reaction kinetics equation After 5cycles of Urea-Bi₂MoO₆ friction catalysis, RhB degradation remained above 91.6%. EPR confirmed that h⁺,•O₂-, and • OH radicals were generated during the friction catalytic process of Urea Bi₂MoO₆. And scavenger test for radicals confirmed that h⁺ was the main substance causing RhB to be degraded. Urea-Bi₂MoO₆ is stimulated by friction, producing electron (e^-)-hole (h⁺) pairs. H⁺reacts with OH-to generate •OH, and e^- reacts with O₂ in water to generate •O₂^-, then RhB is degraded by them.

Key words： RhB tribocatalysis Bi₂MoO₆ urea modification

Received: 29 February 2024

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X703

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	Articles by authors
	XING Yu-lu
	XUE Yi-ran
	CHEN Ning
	SHI Huan-xin
	XU Hao
	GAO Bo
	ZHANG Liu-ke
	MA Bing-rui
	ZHAO Bao-xiu
	LI Jin-cheng

Cite this article:

XING Yu-lu,XUE Yi-ran,CHEN Ning等. Urea-modified Bi₂MoO₆ friction-catalyzed oxidative degradation of rhodamine B[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5556-5565.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I10/5556

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