2. Academic Validation
  3. Copper-doped bismuth oxychloride nanosheets assembled into sphere-like morphology for improved photocatalytic inactivation of drug-resistant bacteria

Copper-doped bismuth oxychloride nanosheets assembled into sphere-like morphology for improved photocatalytic inactivation of drug-resistant bacteria

  • Sci Total Environ. 2023 Nov 28:168916. doi: 10.1016/j.scitotenv.2023.168916.
Jing Yang 1,  Huan Luo 1,  Xinyi Zhu 1,  Ling Cai 2,  Liuzhu Zhou 3,  Hongjie Ruan 4,  Jin Chen 5
Affiliations

Affiliations

  • 1 The Key Laboratory of Modern Toxicology, Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; The Affiliated Chongqing Prevention and Treatment Center for Occupational Diseases, School of Public Health, Nanjing Medical University, Chongqing 400060, China.
  • 2 The Key Laboratory of Modern Toxicology, Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; The Affiliated Chongqing Prevention and Treatment Center for Occupational Diseases, School of Public Health, Nanjing Medical University, Chongqing 400060, China; School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
  • 3 The Key Laboratory of Modern Toxicology, Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China.
  • 4 Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123 Tianfei Lane, Nanjing 210004, China.
  • 5 The Key Laboratory of Modern Toxicology, Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; The Affiliated Chongqing Prevention and Treatment Center for Occupational Diseases, School of Public Health, Nanjing Medical University, Chongqing 400060, China; School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China; Jiangsu Province Engineering Research Center of Antibody Drug, Key Laboratory of Antibody Technique of National Health Commission, Nanjing Medical University, Nanjing 211166, China. Electronic address: jchen@njmu.edu.cn.
PMID: 38036130 DOI: 10.1016/j.scitotenv.2023.168916
Abstract

The devastating microbiological contamination as well as emerging drug-resistant bacteria has posed severe threats to the ecosystem and public health, which propels the continuous exploitation of safe yet efficient disinfection products and technology. Here, copper doping engineered bismuth oxychloride (Cu-BiOCl) nanocomposite with a hierarchical spherical structure was successfully prepared. It was found that due to the exposure of abundant active sites for the adsorption of both bacteria cells and molecular oxygen in the structure, the obtained Cu-BiOCl with nanosheets assembled into sphere-like morphology exhibited remarkable photocatalytic Antibacterial effects. In particular, compared to the pure BiOCl, composite Cu-BiOCl possessed improved Antibacterial effects against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Methicillin-resistant Staphylococcus aureus (MRSA). The combination of physicochemical characterizations and theoretical calculations has revealed that copper doping significantly promoted the LIGHT absorbance, inhibited the recombination of electron-hole pairs, and enhanced molecular oxygen adsorption, which resulted in more generation of active species including Reactive Oxygen Species (ROS) and h+ to achieve superior photocatalytic Bacterial inactivation. Finally, transcriptome analysis on MRSA pinpointed photocatalytic inactivation induced by Cu-BiOCl may retard largely the development of drug-resistance. Therefore, the built spherical Cu-BiOCl nanocomposite has provided an ecofriendly, economical and robust strategy for the efficient removal of drug-resistant bacteria with promising potentials for environmental and healthcare utilizations.

Keywords

Antibacterial agents; BiOCl; Copper doping; Drug-resistant bacteria; Photocatalytic; Transcriptome analysis.

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