1. Construction of a g-C3N4/Bi(OH)3 Heterojunction for the Enhancement of Visible Light Photocatalytic Antibacterial Activity
- Author
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Jian Feng, Li Wang, Bo Xiao, Xia Ran, Caiying Wang, Jinming Zhu, Zuoji Liu, Chaozhong Li, Xinai Cui, Rong Li, Guangwei Feng, and Zeqin Dai
- Subjects
g-C3N4/Bi(OH)3 ,Escherichia coli ,photocatalytic antibacterial activity ,visible light irradiation ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Photocatalytic technology has been recently conducted to remove microbial contamination due to its unique features of nontoxic by-products, low cost, negligible microbial resistance and broad-spectrum elimination capacity. Herein, a novel two dimensional (2D) g-C3N4/Bi(OH)3 (CNB) heterojunction was fabricated byincorporating Bi(OH)3 (BOH) nanoparticles with g-C3N4 (CN) nanosheets. This CNB heterojunction exhibited high photocatalytic antibacterial efficiency (99.3%) against Escherichia coli (E. coli) under visible light irradiation, which was 4.3 and 3.4 times that of BOH (23.0%) and CN (28.0%), respectively. The increase in specific surface area, ultra-thin layered structure, construction of a heterojunction and enhancement of visible light absorption were conducive to facilitating the separation and transfer of photoinduced charge carriers. Live/dead cell staining, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) assays and scanning electron microscopy (SEM) have been implemented to investigate the damage to the cell membrane and the leakage of the intracellular protein in the photocatalytic antibacterial process. The e−, h+ and O2•− were the active species involved in this process. This study proposed an appropriate photocatalyst for efficient treatment of bacterial contamination.
- Published
- 2024
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