异质结CeO<sub>2</sub>/BiOBr的构筑及其光催化降解罗丹明B

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Abstract In this study, CeO₂, BiOBr and CeO₂/BiOBr photocatalysts were synthesized by a hydrothermal method, and the morphology, structure and photoelectrochemical properties of the photocatalysts were characterized by different techniques. The photocatalytic performance was evaluated by degrading Rhodamine B (RhB) under visible light irradiation. The experimental results showed that the CeO₂/BiOBr (CB-10) catalyst with the appropriate amount of CeO₂ (10%) exhibited enhanced photocatalytic activity, recyclability and cycling stability and the degradation rate of RhB reached 99% within 30min. Furthermore, the catalyst attained the highest degradation efficiency (96.1%) within 20min when the catalyst dosage was 0.5g/L, the RhB concentration was 20mg/L and pH value was 3. The possible reaction mechanism of CeO₂/BiOBr heterojunctional material in photocatalytic process was proposed based on the radical capture test and the energy band structure of material. This study can provide a new idea and method for the preparation of Bi-based composite catalysts.

Key words： photocatalytic degradation CeO₂/BiOBr heterojunction Rhodamine B

Received: 23 April 2023

PACS:

X703.5

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	Articles by authors
	GUO Tian-yu
	FAN Xiang-rui
	BAI De-hao
	QI Yu
	WANG Hong-Tao

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GUO Tian-yu,FAN Xiang-rui,BAI De-hao等. Construction of CeO₂/BiOBr heterojuction for photocatalytic degradation of Rhodamine B[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5845-5854.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5845

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