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Antibacterial Activity of Photocatalytic Titanium Dioxide Thin Films with Photodeposited Silver on the Surface of Sanitary Ware
Author(s) -
Machida Mitsuyoshi,
Norimoto Keiichiro,
Kimura Tamon
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00006.x
Subject(s) - anatase , photocatalysis , calcination , rutile , titanium dioxide , scanning electron microscope , thin film , chemical engineering , materials science , antibacterial activity , phase (matter) , coating , sol gel , nuclear chemistry , inorganic chemistry , chemistry , nanotechnology , metallurgy , composite material , catalysis , organic chemistry , bacteria , engineering , genetics , biology
The antibacterial activity of photocatalytic titanium dioxide (TiO 2 ) thin films with photodeposited silver on the surface of sanitary ware was studied. Samples were prepared by coating a TiO 2 sol that was calcined at 880°–980°C and photodeposited with silver ions onto the glazed layer of the sanitary ware. The relationships between the antibacterial activity and the fabrication conditions were investigated by X‐ray diffractometry, scanning electron microscopy, and colorimetry. The phase of TiO 2 identified in the thin films was a mixture of anatase and rutile. The amount of rutile phase increased as the calcination temperature increased, and grain growth of the TiO 2 particles was observed. The activity was dependent on the TiO 2 thickness, the calcination temperature, and the amount of silver. These results suggest that the antibacterial activity was strongly affected by the amount of anatase in the thin films.