1
College of Chemistry, Iran University of Science and Technology, Narmak, Tehran, 16844, I. R. Iran
2
Agricultural Department, Saveh Azad University, Saveh, I. R. Iran
Abstract
In this work, TiO2 /SiO2 (pure anatase), and TiO2 /SiO2 (anatase/rutile) nano-photocatalysts are prepared by using sol-gel method and control of acidity. The particles size is calculated using Scheerer, s equation and is estimated to be around 7-15 nm. In order to improve the photocatalytic activity of TiO2 /SiO2 ,1% (wt) platinum particles are loaded on both catalysts using photoreductive method. SEM images show that doping of Pt particles is not homogenous. FT-IR, BET and UV-Vis Reflectance are used to characterize the structures and properties of photocatalysts. The photocatalytic activities of these catalysts are investigated by their bactericidal activities on E. coli bacteria. 100% destruction of E. coli bacteria has occurred under UV light illumination after 5, 15, 20 and 60 min using Pt-TiO2 /SiO2 (pure anatase), TiO2 /SiO2 (pure anatase), Pt-TiO2 /SiO2 (anatase/rutile) and TiO2 /SiO2 (anatase/rutile) photocatalyst, respectively. The effect of doping Pt is remarkable and rate of destruction using Pt doped catalysts (both catalysts) is three times faster than that of TiO2 /SiO2 catalysts.
Ahmadi,Z. , Afshar,S. , Vafaee,L. and Salehi,A. (2008). Photocatalytic degradation of E. coli bacteria using TiO2/SiO2 nanoparticles with photodeposited platinum. International Journal of Nanoscience and Nanotechnology, 4(1), 39-48.
MLA
Ahmadi,Z. , , Afshar,S. , , Vafaee,L. , and Salehi,A. . "Photocatalytic degradation of E. coli bacteria using TiO2/SiO2 nanoparticles with photodeposited platinum", International Journal of Nanoscience and Nanotechnology, 4, 1, 2008, 39-48.
HARVARD
Ahmadi Z., Afshar S., Vafaee L., Salehi A. (2008). 'Photocatalytic degradation of E. coli bacteria using TiO2/SiO2 nanoparticles with photodeposited platinum', International Journal of Nanoscience and Nanotechnology, 4(1), pp. 39-48.
CHICAGO
Z. Ahmadi, S. Afshar, L. Vafaee and A. Salehi, "Photocatalytic degradation of E. coli bacteria using TiO2/SiO2 nanoparticles with photodeposited platinum," International Journal of Nanoscience and Nanotechnology, 4 1 (2008): 39-48,
VANCOUVER
Ahmadi Z., Afshar S., Vafaee L., Salehi A. Photocatalytic degradation of E. coli bacteria using TiO2/SiO2 nanoparticles with photodeposited platinum. International Journal of Nanoscience and Nanotechnology, 2008; 4(1): 39-48.
