Antibacterial properties of F-doped ZnO visible light photocatalyst

Joanna Podporska-Carroll*, Adam Myles, Brid Quilty, Declan E. McCormack, Rachel Fagan, Steven J. Hinder, Dionysios D. Dionysiou, Suresh C. Pillai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

137 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalJournal of Hazardous Materials
Volume324
DOIs
Publication statusPublished - Feb 15 2017
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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