TY - JOUR
T1 - Visible light response of Ag +/TiO 2-Ti 2O 3 prepared by photodeposition under foam fractionation
AU - Atla, Shashi Bairagi
AU - Chen, Chien Cheng
AU - Chen, Chien Yen
AU - Lin, Pin Yun
AU - Pan, Wei
AU - Cheng, Kai Chien
AU - Huang, Yuh Ming
AU - Chang, Young Fo
AU - Jean, Jiin Shuh
PY - 2012/5/15
Y1 - 2012/5/15
N2 - An Ag +/TiO 2-Ti 2O 3 nanocomposite was synthesized by a novel foam fractionation method: the foam traveled to a fixed vertical column and was fractionated. Silver was deposited (0-0.02 mol%) on titania photocatalytic nanoparticles by the foam fractionation method under UV irradiation. By TEM, the Ag particles were found to be highly dispersed on TiO 2 without any aggregation. XPS studies revealed the presence of both the Ti 3+ and Ti 4+ forms, and with an increase in Ag content, Ti 3+ increased. Ag was found mainly in the Ag + state. The obtained Ag-Ti oxides were investigated for photocatalytic activity by the degradation of methylene blue under visible light and sunlight, and the catalytic activity was better under sunlight than under visible light. The activity was found to increase with an increase in Ag loading. The Ag +/TiO 2-Ti 2O 3 obtained by the foam fractionation method was further investigated for bactericidal activity under visible light. Using 0.05 mol% Ag/Ti, the bacterial growth of Escherichia coli was completely inhibited under visible light.
AB - An Ag +/TiO 2-Ti 2O 3 nanocomposite was synthesized by a novel foam fractionation method: the foam traveled to a fixed vertical column and was fractionated. Silver was deposited (0-0.02 mol%) on titania photocatalytic nanoparticles by the foam fractionation method under UV irradiation. By TEM, the Ag particles were found to be highly dispersed on TiO 2 without any aggregation. XPS studies revealed the presence of both the Ti 3+ and Ti 4+ forms, and with an increase in Ag content, Ti 3+ increased. Ag was found mainly in the Ag + state. The obtained Ag-Ti oxides were investigated for photocatalytic activity by the degradation of methylene blue under visible light and sunlight, and the catalytic activity was better under sunlight than under visible light. The activity was found to increase with an increase in Ag loading. The Ag +/TiO 2-Ti 2O 3 obtained by the foam fractionation method was further investigated for bactericidal activity under visible light. Using 0.05 mol% Ag/Ti, the bacterial growth of Escherichia coli was completely inhibited under visible light.
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U2 - 10.1016/j.jphotochem.2012.03.008
DO - 10.1016/j.jphotochem.2012.03.008
M3 - Article
AN - SCOPUS:84860353297
VL - 236
SP - 1
EP - 8
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
ER -