TY - JOUR
T1 - Oxygen sensing performance of Nb-doped TiO2 thin film with porous structure
AU - Gan, Linhui
AU - Wu, Congcong
AU - Tan, Yuan
AU - Chi, Bo
AU - Pu, Jian
AU - Jian, Li
N1 - Funding Information:
This research is financially supported by National Natural Science Foundation of China ( 50902056 ). The authors would like to thank Materials Characterization Center of Huazhong University of Science and Technology for samples measurement assistance.
PY - 2014
Y1 - 2014
N2 - In this paper, Nb-doped titanium dioxide (TiO2) porous thin films in application of oxygen sensors were studied. A facile sol-gel method was used to prepare the undoped and Nb-doped TiO2 thin films. The microstructure and oxygen-sensing behavior were investigated. The results indicate that Nb-doping can retard the phase transition from anatase to rutile and reduce the grain size. The oxygen responses of the thin film can be greatly improved by Nb-doping, which are 73.2 and 78.7 for sample with 6% Nb-doping measured at 700°C in the atmosphere with 2% and 20.9% oxygen, while those for undoped TiO2 are only 6.5 and 6.6 in the same condition. The 6% Nb-doped TiO2 thin film also shows the fastest response time of only 1.1 s at 700°C, which is only less than 1/10 of those for the undoped TiO2 thin film.
AB - In this paper, Nb-doped titanium dioxide (TiO2) porous thin films in application of oxygen sensors were studied. A facile sol-gel method was used to prepare the undoped and Nb-doped TiO2 thin films. The microstructure and oxygen-sensing behavior were investigated. The results indicate that Nb-doping can retard the phase transition from anatase to rutile and reduce the grain size. The oxygen responses of the thin film can be greatly improved by Nb-doping, which are 73.2 and 78.7 for sample with 6% Nb-doping measured at 700°C in the atmosphere with 2% and 20.9% oxygen, while those for undoped TiO2 are only 6.5 and 6.6 in the same condition. The 6% Nb-doped TiO2 thin film also shows the fastest response time of only 1.1 s at 700°C, which is only less than 1/10 of those for the undoped TiO2 thin film.
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U2 - 10.1016/j.jallcom.2013.09.161
DO - 10.1016/j.jallcom.2013.09.161
M3 - Article
AN - SCOPUS:84886451582
VL - 585
SP - 729
EP - 733
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -