Durable and recyclable BiOBr/silk fibroin-cellulose acetate composite film for efficient photodegradation of dyes under visible light irradiation

IF 4.3 3区工程技术 Q2 ENGINEERING, CHEMICAL

Frontiers of Chemical Science and Engineering Pub Date : 2023-06-19 DOI:10.1007/s11705-023-2323-y

Jialiang Xu, Jian Jian, Yixiao Dan, Jie Song, Lingxi Meng, Pei Deng, Weijie Sun, Yusheng Zhang, Jinhua Xiong, Zhengqiu Yuan, Hu Zhou

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引用次数: 1

Abstract

A stable and recyclable of BiOBr/silk fibroin-cellulose acetate composite film was prepared by blending-wet phase transformation and in situ precipitate technology. The cellulose acetate film modified by silk fibroin formed a finger-shaped porous structure, which provided a large space for the uniform growth of BiOBr nanosheets and facilitated the shuttle flow of dyes in film. The morphology, phase structure, and optical properties of the composite films were characterized using various techniques, and their photocatalytic performance for dye wastewater was evaluated under visible light irradiation. Results showed that the BiOBr/SF-CA composite film exhibited efficient photocatalytic activity with 99.9% of rhodamine B degradation rate. Moreover, the composite film maintained high catalytic stability because Bi as the active species deposited on the film showed almost no loss. Finally, the possible photocatalytic mechanisms in the BiOBr/SF-CA composite film were speculated through radical-trapping experiments and electron spin resonance testing.

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耐用可回收的BiOBr/丝素-醋酸纤维素复合膜在可见光照射下对染料的有效光降解

采用湿法相变和原位沉淀相结合的方法，制备了稳定、可回收的BiOBr/丝素-醋酸纤维素复合膜。丝素蛋白修饰的醋酸纤维素膜形成指状多孔结构，为BiOBr纳米片的均匀生长提供了较大的空间，促进了染料在膜中的穿梭流动。采用多种技术对复合膜的形貌、相结构和光学性能进行了表征，并在可见光照射下评价了其对染料废水的光催化性能。结果表明，BiOBr/SF-CA复合膜具有高效的光催化活性，罗丹明B的降解率为99.9%。此外，复合膜保持了高催化稳定性，因为沉积在膜上的活性物质Bi几乎没有损失。最后，通过自由基捕获实验和电子自旋共振测试，推测了BiOBr/SF-CA复合膜中可能的光催化机制。

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.