g-C3N4/Pd/C3N4Bi2WO6光催化剂协同降解苯扎贝特机理研究

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Abstract A flower-like g-C₃N₄/Pd/C₃N₄Bi₂WO₆ heterostructure with high visible light activity was designed and synthesized by low temperature hydrothermal method utilizing the plasmon resonance effect of noble metal Pd and the photocatalytic synergism of shape-controlled C₃N₄Bi₂WO₆. It was found that the composite of Pd/g-C₃N₄ and C₃N₄Bi₂WO₆ significantly enhanced removal efficiency of BZF under visible light irradiation. Further analysis of characterization showed that C₃N₄Bi₂WO₆ in g-C₃N₄/Pd/C₃N₄Bi₂WO₆ exhibited a central radiated flower-like nanostructure, which is connected with layered Pd/g-C₃N₄. The noble metal Pd could be used as the medium for electron transport to promote the formation of Z-type heterostructures between g-C₃N₄ and C₃N₄Bi₂WO₆, which is beneficial to cooperatively enhance the photocatalytic activity. It was confirmed that ·OH was the main active species in degradation of BZF with g-C₃N₄/Pd/C₃N₄Bi₂WO₆ heterostructures by quenching experiments and EPR analysis. Moreover, the LC-MS/MS analysis indicated that hydroxylation with fibrate chain substituent was the main route of BZF degradation.

Key words： bezafibrate Pd g-C₃N₄ C₃N₄Bi₂WO₆ heterostructure

Received: 15 October 2023

PACS:

X703.5

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	YIN Ze
	GAO Bo-yi
	LIU Yuan-qiang
	GAO Ai-fang

Cite this article:

YIN Ze,GAO Bo-yi,LIU Yuan-qiang等. Study on g-C₃N₄/Pd/C₃N₄Bi₂WO₆ heterostructure and its synergistic degradation mechanism of bezafibrate[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(5): 2504-2513.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I5/2504

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