The effects of the bacterial interaction with visible-light responsive titania photocatalyst on the bactericidal performance

Chia Liang Cheng, Der Shan Sun, Wen Chen Chu, Yao Hsuan Tseng, Han Chen Ho, Jia Bin Wang, Pei Hua Chung, Jiann Hwa Chen, Pei Jane Tsai, Nien Tsung Lin, Mei Shiuan Yu, Hsin Hou Chang

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82 Citations (Scopus)

Abstract

Bactericidal activity of traditional titanium dioxide (TiO2) photocatalyst is effective only upon irradiation by ultraviolet light, which restricts the potential applications of TiO2 for use in our living environments. Recently carbon-containing TiO2 was found to be photoactive at visible-light illumination that affords the potential to overcome this problem; although, the bactericidal activity of these photocatalysts is relatively lower than conventional disinfectants. Evidenced from scanning electron microscopy and confocal Raman spectral mapping analysis, we found the interaction with bacteria was significantly enhanced in these anatase/rutile mixed-phase carbon-containing TiO2. Bacteria-killing experiments indicate that a significantly higher proportion of all tested pathogens including Staphylococcus aureus, Shigella flexneri and Acinetobacter baumannii, were eliminated by the new nanoparticle with higher bacterial interaction property. These findings suggest the created materials with high bacterial interaction ability might be a useful strategy to improve the antimicrobial activity of visible-light-activated TiO2.

Original languageEnglish
Article number7
JournalJournal of biomedical science
Volume16
Issue number1
DOIs
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology
  • Biochemistry, medical
  • Pharmacology (medical)

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