ZnS@CdS/HAP复合微球的SILAR法制备及光催化性能

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Abstract Hollow hydroxyapatite (HAP) microspheres prepared using yeast template method were used as substrates for the preparation of ZnS@CdS/HAP composite microspheres through the successive ionic layer adsorption reaction (SILAR) method. The crystal structure, micro morphology, and light absorption capabilities of the materials were analyzed using XRD, SEM, UV-vis characterization techniques. Additionally, the photocatalytic mechanism of the composite microspheres was investigated through methylene blue photocatalytic degradation experiments. ZnS@CdS/HAP composite microspheres were successfully prepared using the SILAR method. The ZnS@CdS/HAP composite microspheres had a diameter of about 3~5 μm and showed good dispersibility. They exhibited excellent absorption performance in the visible light region and high photocatalytic activity. Under the conditions of 1g/L catalyst addition, pH=7, and 25℃, the removal rate of the 50mL methylene blue solution with a concentration of 10mg/L reached up to 93% after 100min of visible light photocatalysis. The mechanism analysis confirmed that the Z-scheme charge transfer mechanism possibly existing in ZnS@CdS/HAP effectively inhibited the recombination of photogenerated carriers and the occurrence of photocorrosion, thereby enhancing the photocatalytic activity and stability of the ZnS@CdS/HAP composite microspheres.

Key words： CdS ZnS photocorrosion HAP photocatalytic stability

Received: 11 July 2023

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X703

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	YANG Li
	JING Xiao-man
	JIANG Xiao-xue
	WANG Ke
	LUO Yue

Cite this article:

YANG Li,JING Xiao-man,JIANG Xiao-xue等. SILAR preparation of ZnS@CdS/HAP composite microspheres and their photocatalytic capacity[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(2): 851-858.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I2/851

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