Ag3PO4/Cu-BiVO4 p-n异质结的制备及其增强可见光催化降解四环素性能

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Abstract The Ag₃PO₄/Cu-BiVO₄ heterostructure was successfully synthesized using hydrothermal and in-situ precipitation methods to load Ag₃PO₄ nanoparticles onto the Cu²⁺ doped monoclinic BiVO₄ microspheres, and was used as the photocatalyst for the efficient degradation of tetracycline (TC) under the visible light. Materials characterization was carried out. The techniques such as SEM, TEM, XPS, FTIR, UV-Vis DRS and EIS were applied to characterize the samples. Our results showed that Cu²⁺ modification and Ag₃PO₄ nanoparticles increased the specific surface area and visible light response performance, which could provide more active sites on the heterojunction interface. Ag₃PO₄/Cu-BiVO₄with Bi/Ag at 2:1 ratio demonstrated the highest photocatalytic removal performance (91.68%) of TC (20mg/L) within 120min, and the degradation rate remained at about 86.1% for a five-consecutive cycle. h⁺ and ·O₂^- were experimentally confirmed to be the main active species. The enhanced photocatalytic activity could be mainly attributed to the formation of p-n heterojunction between Cu-BiVO₄ and Ag₃PO₄ and the band regulation of Cu²⁺ doping, which could effectively improve the separation and migration efficiency of photogenerated carriers during the photocatalytic reaction.

Key words： visible-light photocatalysis Ag₃PO₄/Cu-BiVO₄ hydrothermal tetracycline p-n heterojunction

Received: 01 June 2021

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X703

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	Articles by authors
	GUO Ji-feng
	LI Jing
	SUN Ze-xin
	LI Ze-en
	LU Chang-yu

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GUO Ji-feng,LI Jing,SUN Ze-xin等. Synthesis of Ag₃PO₄/Cu-BiVO₄ p-n heterojunction and enhancement of its visible-light photocatalytic degradation of tetracycline[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(1): 146-159.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I1/146

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