Synthesis and Bactericidal Ability of TiO2and Ag-TiO2Prepared by Coprecipitation Method | Zendy

Robert Liu | Zendy; Haibo Wu | Zendy; Ruth YuLi Yeh | Zendy; C. Y. Lee | Zendy; Yung-Tse Hung | Zendy

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Synthesis and Bactericidal Ability of TiO₂and Ag-TiO₂Prepared by Coprecipitation Method

Author(s) -

Robert Liu,

Haibo Wu,

Ruth YuLi Yeh,

C. Y. Lee,

Yung-Tse Hung

Publication year - 2012

Publication title -

international journal of photoenergy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.426

H-Index - 51

eISSN - 1687-529X

pISSN - 1110-662X

DOI - 10.1155/2012/640487

Subject(s) - coprecipitation , nuclear chemistry , analytical chemistry (journal) , visible spectrum , materials science , chemistry , crystallography , mineralogy , inorganic chemistry , chromatography , optoelectronics

Preparation of photocatalysts of TiO2 and Ag-TiO2 was carried out by coprecipitation method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), SEM, EDX, and XRF analysis. The disinfection of E. coli, a model indicator organism for the safe water supply, was investigated by using TiO2 and Ag-TiO2 under different light sources. The treatment efficacy for the inactivation of E. coli would be UV/Ag-TiO2; visible/Ag-TiO2; dark/Ag-TiO2; UV (all 100%) > UV/TiO2 (99%) > visible/TiO2 (96%) > dark/TiO2 (87%) > visible (23%) > dark (19%). The order of disinfection efficiency by their corresponding kinetic initial apparent rate constants, app, (min−1) would be UV/Ag-TiO2; visible/Ag-TiO2 (both 6.67) > UV (6.6) > dark/Ag-TiO2 (6.56) > UV/TiO2 (1.62) > visible/TiO2 (1.08) > dark/TiO2 (0.7) > visible (0.28) > dark (0.03). The application of TiO2 doped with silver strongly improved the ability of disinfection treatment. The study of mineralization of E. coli by measurement of TOC (total organic carbon) removal percentage showed that the visible light may effectively be applied for the disinfection unit of water and wastewater treatment system by using photocatalysts of Ag-TiO2

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