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

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

机构地区：[1]School of Chemistry and Chemical Engineering,Hunan Engineering Research Center for Functional Film Materials,Hunan University of Science and Technology,Xiangtan 411201,China [2]School of Chemical Engineering,Post Doctoral Mobile Station in Chemistry,Xiangtan University,Xiangtan 411105,China [3]Post Doctoral Research Workstation,Anhui Huaxing Chemical Industry Co.,Ltd.,Hexian 238251,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第11期1765-1775,共11页化学科学与工程前沿（英文版）

基　　金：the financial support by the National Natural Science Foundation of China(Grant No.22202068);Natural Science Foundation in Hunan Province(Grant No.2021JJ30239);Natural Science Foundation for Distinguished Young Scholars in Hunan Province(Grant No.2020JJ2014).

摘　　要：A stable and recyclable of BiOBr/silk fibroincellulose acetate composite film was prepared by blendingwet 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.

关 键 词：BiOBr nanosheet cellulose acetate silk fibroin photocatalytic degradation dye wastewater 

分 类 号：O64[理学—物理化学]