咔唑
光催化
共轭体系
罗丹明B
光化学
材料科学
共聚物
侧链
聚合物
深铬移
高分子化学
聚合物太阳能电池
化学
化学工程
有机化学
催化作用
荧光
物理
量子力学
工程类
作者
Xiaojie Liu,Yahui Du,Yong Zhao,Xin Song,Xin Jing,Liangmin Yu,Mingliang Sun
标识
DOI:10.1016/j.apcatb.2022.121401
摘要
Constructing polymer heterojunction (PHJ) has emerged as an alternative to pursue excellent photocatalytic sterilization and contaminant degradation performance. Herein, the antibacterial carbazole unit is employed as the side chain of benzodithiophene. Besides, the main chain copolymerization strategy is adopted to tune the light absorption and exciton dissociation of these 2D donor−acceptor (D−A) conjugated polymer/g-C3N4 PHJ by introducing different A units. Specifically, copolymerizing diketopyrrolopyrrole into P4 drastically bathochromic-shifts the light absorption of the PHJ. By contrast, introducing fluorinated benzotriazole into P9 contributes to achieve the most efficient charge separation. Surprisingly, the P7/g-C3N4 with benzodithiophene-4,8-dione as the A unit reaches the balance between light absorption, charge separation efficiency, and water wettability. Consequently, the P7/g-C3N4 shows the highest photocatalytic activity with over 99.7% antibacterial rates for E. coli and S. aureus and 97.6% degradation rate for Rhodamine B under irradiation for 45 and 90 min, respectively.
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