Anatase TiO2 co-doped with silver and ceria for antibacterial application

Benjawan Moongraksathum, Yu Wen Chen

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Anatase TiO2 co-doped with Ag and CeO2 (Ag/CeO2-TiO2) was prepared by the peroxo sol-gel method for antibacterial application. The as-prepared materials were characterised by high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The antibacterial activities of the samples were tested against two different bacteria: Escherichia coli (OP50), a Gram-negative organism and Staphylococcus aureus (USA300), a Gram-positive organism. The antibacterial effectiveness of the Ag/CeO2-TiO2 coating was >99.99%, i.e. it was extremely effective against both E. coli (OP50) and S. aureus (USA300) after either 30 min of illumination with UVA radiation or 24-h of incubation in the dark. The Ag/CeO2-TiO2 coating was found to be significantly more active than pure TiO2 and TiO2 doped with CeO2 or Ag alone. Therefore, Ag/CeO2-TiO2 can be used as a coating material for the disinfection of both Gram-positive and Gram-negative bacteria.

Original languageEnglish
Pages (from-to)68-74
Number of pages7
JournalCatalysis Today
Volume310
DOIs
StatePublished - 15 Jul 2018

Keywords

  • Antimicrobial activity
  • Nano silver
  • Peroxo sol-gel
  • Thin film

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