TY - JOUR
T1 - Sol-gel derived silver-incorporated titania thin films on glass
T2 - Bactericidal and photocatalytic activity
AU - Akgun, Betul Akkopru
AU - Wren, Anthony W.
AU - Durucan, Caner
AU - Towler, Mark R.
AU - Mellott, Nathan P.
N1 - Funding Information:
Acknowledgments Supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under 106M061 Grant, Alfred University, and the 3M Non-Tenured Faculty Grant (NPM). BAA also thanks TUBITAK for the support through 2214 National Scholarship Program for PhD students. The authors wish to thank Brain Adams for his assistance in XPS.
PY - 2011/8
Y1 - 2011/8
N2 - Titanium dioxide (TiO2) and silver-containing TiO2 (Ag-TiO2) thin films were prepared on silica pre-coated float glass substrates by a sol-gel spin coating method. The bactericidal activity of the films was determined against Staphylococcus epidermidis under natural and ultraviolet (UV) illumination by four complementary methods; (1) the disk diffusion assay, (2) UV-induced bactericidal test, (3) qualitative Ag ion release in bacteria inoculated agar media and (4) surface topographical examination by laserscan profilometry. Photocatalytic activity of the films was measured through the degradation of stearic acid under UV, solar and visible light conditions. The chemical state and distribution of Ag nanoparticles, as well as the structure of the TiO2 matrix, and hence the bactericidal and photocatalytic activity, is controlled by post-coating calcination treatment (100-650 °C). Additionally, under any given illumination condition the Ag-incorporated films were found to have superior bactericidal and photocataltyic activity performance compared to TiO2 thin films. It is shown that with optimized thin film processing parameters, both TiO 2 and Ag-TiO2 thin films calcined at 450 °C were bactericidal and photocatalytically active.
AB - Titanium dioxide (TiO2) and silver-containing TiO2 (Ag-TiO2) thin films were prepared on silica pre-coated float glass substrates by a sol-gel spin coating method. The bactericidal activity of the films was determined against Staphylococcus epidermidis under natural and ultraviolet (UV) illumination by four complementary methods; (1) the disk diffusion assay, (2) UV-induced bactericidal test, (3) qualitative Ag ion release in bacteria inoculated agar media and (4) surface topographical examination by laserscan profilometry. Photocatalytic activity of the films was measured through the degradation of stearic acid under UV, solar and visible light conditions. The chemical state and distribution of Ag nanoparticles, as well as the structure of the TiO2 matrix, and hence the bactericidal and photocatalytic activity, is controlled by post-coating calcination treatment (100-650 °C). Additionally, under any given illumination condition the Ag-incorporated films were found to have superior bactericidal and photocataltyic activity performance compared to TiO2 thin films. It is shown that with optimized thin film processing parameters, both TiO 2 and Ag-TiO2 thin films calcined at 450 °C were bactericidal and photocatalytically active.
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U2 - 10.1007/s10971-011-2488-6
DO - 10.1007/s10971-011-2488-6
M3 - Article
AN - SCOPUS:80051552033
SN - 0928-0707
VL - 59
SP - 228
EP - 238
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 2
ER -