Antibacterial properties of F-doped ZnO visible light photocatalyst

JOURNAL OF HAZARDOUS MATERIALS

卷:324

Article; Proceedings Paper

Podporska-Carroll, Joanna¹  Myles, Adam^1,2  Quay, Brid³  McCormack, Declan E.^1,2  Fagan, Rachel^1,2  Hinder, Steven J.⁴  Dionysiou, Dionysios D.⁵  Pillai, Suresh C.^1,6 

[1] DIT FOCAS Inst, Ctr Res Engn Surface Technol CREST, Kevin St, Dublin 8, Ireland

[2] Dublin Inst Technol, Sch Chem & Pharmaceut Sci, Kevin St, Dublin 8, Ireland

[3] Dublin City Univ, Sch Biotechnol, Dublin 9, Ireland

[4] Univ Surrey, Fac Engn & Phys Sci, Surface Anal Lab, Guildford GU2 7XH, Surrey, England

[5] Univ Cincinnati, Environm Engn & Sci Program, DBCEE, 705 Engn Res Ctr, Cincinnati, OH 45221 USA

[6] Inst Technol Sligo, Dept Environm Sci, Nanotechnol Res Grp, PEM Ctr, Sligo, Ireland

关键词: ZnO powder;    Photocatalysis;    Anti-bacterial;    Gram-positive;    Gram-negative;    Synthesis of zinc oxide nanoparticle;    TiO2 photocatalysts;    Reactive oxygen species (ROS);    Oxygen defects;    Antimicrobial action;    Hydroxyl radical;    XPS deconvolution;    Dopants;    Fluorine;   

DOI  :  10.1016/j.jhazmat.2015.12.038

来源: Elsevier

【 摘 要 】

Nanocrystalline ZnO photocatalysts were prepared by a sol-gel method and modified with fluorine to improve their photocatalytic anti-bacterial activity in visible light. Pathogenic bacteria such as Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) were employed to evaluate the antimicrobial properties of synthesized materials. The interaction with biological systems was assessed by analysis of the antibacterial properties of bacteria suspended in 2% (w/w) powder solutions. The F-doping was found to be effective against S. aureus (99.99% antibacterial activity) and E. coli (99.87% antibacterial activity) when irradiated with visible light. Production of reactive oxygen species is one of the major factors that negatively impact bacterial growth. In addition, the nanosize of the ZnO particles can also be toxic to microorganisms. The small size and high surface-to-volume ratio of the ZnO nanoparticles are believed to play a role in enhancing antimicrobial activity. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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