TY - JOUR
T1 - Study on photocatalytic degradation of gaseous dichloromethane using pure and iron ion-doped TiO2 prepared by the sol-gel method
AU - Hung, Wen Chi
AU - Fu, Ssu Han
AU - Tseng, Jeou Jen
AU - Chu, Hsin
AU - Ko, Tzu Hsing
N1 - Funding Information:
This study was funded in part by National Science Council, Republic of China. (contract number: NSC92-2211-E-006-018).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007/2
Y1 - 2007/2
N2 - The synthesis of TiO2 and Fe-TiO2 by sol-gel method is demonstrated and characterized. The characterization of TiO2 and Fe-TiO2 is performed with instruments, including TGA/DTA, FTIR, UV-Vis, N2 adsorption and SEM. Dichloromethane is used for the photocatalytic activity test. From the results of dichloromethane photocatalyitc degradation, the calcined temperature of TiO2 and the presence of water vapor influence the photocatalytic activity. The optimum doping amount of iron ions is 0.005 mol%, and this can enhance the photocatalytic activity, while too great an amount will make the iron ions become recombination centers for the electron-hole pairs and reduce the photocatalytic activity. UV-Vis diffuse reflectance spectra of Fe-TiO2 show an increase in absorbency in the visible light region with the increase in iron ions doping concentration The intermediate of dichloromethane photodegradation includes CHCl3, CCl4, CH2Cl2 and COCl2. The presence of iron ions may reduce the adsorption of Cl element on the surface of the photocatalyst.
AB - The synthesis of TiO2 and Fe-TiO2 by sol-gel method is demonstrated and characterized. The characterization of TiO2 and Fe-TiO2 is performed with instruments, including TGA/DTA, FTIR, UV-Vis, N2 adsorption and SEM. Dichloromethane is used for the photocatalytic activity test. From the results of dichloromethane photocatalyitc degradation, the calcined temperature of TiO2 and the presence of water vapor influence the photocatalytic activity. The optimum doping amount of iron ions is 0.005 mol%, and this can enhance the photocatalytic activity, while too great an amount will make the iron ions become recombination centers for the electron-hole pairs and reduce the photocatalytic activity. UV-Vis diffuse reflectance spectra of Fe-TiO2 show an increase in absorbency in the visible light region with the increase in iron ions doping concentration The intermediate of dichloromethane photodegradation includes CHCl3, CCl4, CH2Cl2 and COCl2. The presence of iron ions may reduce the adsorption of Cl element on the surface of the photocatalyst.
UR - http://www.scopus.com/inward/record.url?scp=33846096917&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846096917&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2006.09.037
DO - 10.1016/j.chemosphere.2006.09.037
M3 - Article
C2 - 17092538
AN - SCOPUS:33846096917
SN - 0045-6535
VL - 66
SP - 2142
EP - 2151
JO - Chemosphere
JF - Chemosphere
IS - 11
ER -