BaSnO<sub>3</sub>钙钛矿光催化降解邻苯二甲酸二乙酯的机理研究

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Abstract The photocatalytic degradation potential of BaSnO₃ stannate perovskite was investigated under simulated sunlight, where diethyl phthalate (DEP) was selected as the probe pollutants. The results of modern spectral analysis showed that BaSnO₃ perovskite with abundant oxygen vacancies, structural defects, and excellent photocatalytic activity could effectively degrade 91.8% of DEP through pseudo-first-order reaction kinetics, and it also remained good degradation efficiency in the pH from 3.0 to 9.0. The photogenerated holes (h⁺), superoxide (O₂·^-), and hydroxyl radicals (·OH) participated in the photo-degradation, among which O₂·^- played the most important role. Furthermore, the degradation mechanism was explored using density functional theory (DFT) calculations, proving that the reactive oxygen species (including O₂·^- and ·OH) were responsible for the hydroxylation of benzene ring and the breaking of the aliphatic chain, while h⁺ was prone to break the aliphatic chain.

Key words： stannate perovskite photocatalysis diethyl phthalate density functional theory

Received: 25 August 2022

PACS:

X703

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	Articles by authors
	YE Quan-yun
	LI Xiang
	MA Xiao-rui
	LI Pei-ran
	LIU Wang-rong
	HE De-chun
	SHE Lei

Cite this article:

YE Quan-yun,LI Xiang,MA Xiao-rui等. Insights into photocatalytic degradation of diethyl phthalate over BaSnO₃ perovskite[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1208-1215.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1208

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