可见光响应的CBM/PVDF自清洁催化膜制备及性能

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Abstract A photocatalytic membrane reaction process, integrating a CBM (gC₃N₄/BiOBr/MXene) photocatalyst and a polyvinylidene fluoride (PVDF) ultrafiltration (UF) membrane, was constructed using a phase inversion method. The addition of CBM was adjusted to optimize the membrane surface structure and properties, as well as to improve the hydrophilicity and permeability of the composite membrane. Tetracycline hydrochloride (TC-HCl), a common antibiotic drug, was used as the target pollutant in the dead-end process to assess the separation and fouling resistance capabilities. The optimally doped PVDF/CBM-0.6membrane achieved 92 % degradation of TC-HCl, in which the active species ·O₂^- and h⁺ played a dominant role. The degradation efficiency remains above 85% after 5 cycles, proving its good recyclability. Thirteen degradation intermediates and potential degradation pathways were proposed, including hydroxylation, demethylation, deamination, benzene ring opening, and deamidation reactions. Continuous operation with bovine serum albumin (BSA) confirmed the ability of the process to alleviate irreversible membrane fouling by preventing pore blockage and pollutant adhesion, achieving an efficient membrane self-cleaning. Overall, the CBM/PVDF photocatalytic membrane proposed in this work has the potential to enhance the practical application of photocatalytic membrane reaction systems.

Key words： membrane filtration photocatalysis degradation mechanisms membrane fouling self-cleaning

Received: 30 May 2024

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X701

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	Articles by authors
	GAO Ke-xuan
	YANG Yu
	CHAI Yi-ran
	HOU Li-an

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GAO Ke-xuan,YANG Yu,CHAI Yi-ran等. Preparation and properties of visible light responsive CBM/PVDF self-cleaning catalytic membrane[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 103-112.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/103

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