电纺BiOCl@UiO-66-NH<sub>2</sub>@TSPAN纳米纤维可见光催化还原Cr(Ⅵ)

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摘要为改善UiO-66-NH₂的光催化活性,以热氧化稳定处理的电纺聚丙烯腈(TSPAN)纳米纤维为载体,通过溶剂热法原位负载UiO-66-NH₂和BiOCl晶体,设计构筑了柔性BiOCl@UiO-66-NH₂@TSPAN复合纳米纤维,并考察了其可见光催化还原Cr(VI)的性能.结果表明,UiO-66-NH₂和BiOCl可先后均匀负载于TSPAN纤维表面,且由于BiOCl的引入,形成了BiOCl/UiO-66-NH₂异质结构,提高了材料的可见光响应性,降低了光生电子空穴对的复合率,对Cr(VI)表现出增强的可见光驱动光催化还原活性,在120min内还原率达到100%,5次循环后,保持良好的稳定性,对Cr(VI)的光催化还原效率仍在90%以上.此外,该复合材料具有柔韧性,可以快速方便地从反应溶液中分离.

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	周美梅
	向婉婷
	王鹏博
	朱雪梅
	邹伟
	何家慧
	罗平平

关键词 ：静电纺丝, 光催化, 六价铬, 金属有机框架物, 氯氧化铋

Abstract：Herein, to improve the photocatalytic activity of UiO-66-NH₂, electrospun polyacrylonitrile nanofibers treated by thermal oxidative stabilization (TSPAN) were used as supports for in-situ loading of UiO-66-NH₂ and BiOCl crystals by solvothermal method, designing and constructing flexible BiOCl@UiO-66-NH₂@TSPAN composite nanofibers. The performance of the composite nanofibers for visible light-driven Cr(VI) photocatalytic reduction was investigated. The results showed that UiO-66-NH₂ and BiOCl could be uniformly loaded onto the surface of the TSPAN nanofibers. Due to the introduction of BiOCl, BiOCl/UiO-66-NH₂ heterojunction was formed, which improved the visible light response of the composite nanofibers, reduced the recombination rate of photo-generated electron-hole pairs, and then exhibited enhanced visible light-driven photocatalytic activity for the reduction of Cr(VI). The reduction rate reached 100% within 120minutes. After five cycles, the composite nanofibers maintained good stability and the photocatalytic reduction efficiency for Cr (VI) was still above 90%. In addition, they were flexible and could be quickly and conveniently separated from the reaction solution.

Key words： electrospinning photocatalysis Cr(VI) metal-organic frameworks BiOCl

收稿日期: 2023-07-23

PACS:

X703.5

基金资助:科技部重点研发项目(2018YFE0103800);长安大学中央高校基本科研业务费专项资金资助项目(300102299104)

作者简介: 周美梅(1987-),女,四川资中人,讲师,博士,主要从事环境工程材料构筑以及水污染防治与修复方面的研究.发表论文20余篇.mmzhou@chd.edu.cn.

引用本文:

周美梅, 向婉婷, 王鹏博, 朱雪梅, 邹伟, 何家慧, 罗平平. 电纺BiOCl@UiO-66-NH₂@TSPAN纳米纤维可见光催化还原Cr(Ⅵ)[J]. 中国环境科学, 2024, 44(3): 1366-1375. ZHOU Mei-mei, XIANG Wan-ting, WANG Peng-bo, ZHU Xue-mei, ZOU Wei, HE Jia-hui, LUO Ping-ping. Electrospun BiOCl@UiO-66-NH₂@TSPAN nanofibers for visible-light-driven Cr (VI) photocatalytic reduction. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1366-1375.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I3/1366

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