Anti-bacterial activity of indoor-light activated photocatalysts
| Autor: | Steven J. Hinder, Michael K. Seery, Suresh C. Pillai, Georg Michlits, Damian W. Synnott |
|---|---|
| Přispěvatelé: | SFI, NSF, InvestNI |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
air water Nanotechnology doping 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis e. coli Nanomaterials fuel cell X-ray photoelectron spectroscopy TiO2 pollution Dopant disinfection General Environmental Science Process Chemistry and Technology 021001 nanoscience & nanotechnology solar Nanocrystalline material Nanoscience and Nanotechnology 0104 chemical sciences solar cell ZnS hydrogen Photocatalysis Crystallite crypospiridium Reactive oxygen species 0210 nano-technology Luminescence energy Visible spectrum Nuclear chemistry |
| Zdroj: | Articles |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2012.10.020 |
| Popis: | Nanocrystalline photocatalysts, prepared under ambient conditions using a microwave assisted synthesis, show indoor light photocatalytic activity for the degradation of Staphylococcus aureus and Escherichia coli . The zinc sulphide (ZnS) nanomaterials, prepared by a microwave assisted synthesis, are shown to be cubic blende structure with an average crystallite size of 4–6 nm. The anti-bacterial activity of these nanomaterials is investigated under irradiation from a 60 W light bulb and photocatalytic activity is revealed to be due to the defects present in the crystal structure. The ZnS shows anti-bacterial action as both a bacteriostatic and bacteriocidal (88% reduction in the amount of bacteria in 5 h) material and the methods of bacterial degradation on the ZnS is discussed. The anti-bacterial actions of these materials were also compared with commercial ZnS and Evonik-Degussa P-25. A detailed mechanism for the light absorption in the visible light region of the microwave prepared ZnS is proposed based on the luminescence spectroscopy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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