Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/83850
Title: Facile fabrication of Ag/C-TiO 2 nanoparticles with enhanced visible light photocatalytic activity for disinfection of Escherichia coli and Enterococcus faecalis
Authors: Zhang, Li
Han, Mandi
Tan, Ooi Kiang
Tse, Man Siu
Wang, Yu Xi
Sze, Chun Chau
Keywords: Escherichia coli
Photocatalytic disinfections
Issue Date: 2013
Source: Zhang, L., Han, M., Tan, O. K., Tse, M. S., Wang, Y. X.,& Sze, C. C. (2013). Facile fabrication of Ag/C-TiO 2 nanoparticles with enhanced visible light photocatalytic activity for disinfection of Escherichia coli and Enterococcus faecalis . J. Mater. Chem. B, 1(4), 564-570.
Series/Report no.: J. Mater. Chem. B
Abstract: This work aimed to investigate the promotive effect of Ag modification on C-TiO2 for visible light photocatalytic disinfection of microorganisms. Ag/C-TiO2 was prepared by a facile one-step synthesis approach through thermal oxidation of AgNO3-impregnated TiC precursor. The self-doped carbon exists as both interstitial and substitutional carbon to collectively enhance the visible light photocatalytic absorption. The loaded silver nanoparticles were uniformly distributed on the TiO2 surface in the Ag0 metallic state, further enhancing the visible light absorption due to surface plasmon resonance yet inhibiting the charge carrier recombination by conduction band electron trapping. The band structure and a tentative visible light photocatalytic disinfection mechanism of Ag/C-TiO2 with four pathways were thus proposed, and the enhanced visible light photocatalytic performance was demonstrated for disinfection of Escherichia coli (E. coli) and Enterococcus faecalis (E. faecalis) in comparison with C-TiO2. This improvement was more pronounced with increasing Ag loading in the range of 0.5–5.0 wt%, which can be attributed to the improved visible light absorption and good charge carrier separation due to Ag modification as well as to the inherent bactericidal effect of metallic Ag.
URI: https://hdl.handle.net/10356/83850
http://hdl.handle.net/10220/41480
DOI: 10.1039/C2TB00113F
Rights: © Royal Society of Chemistry 2016.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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