期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 171, 期 -, 页码 899-906出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.06.002
关键词
TiO2 nanorods; Metal-oxide; Gas-sensors; Niobium; LPG; Ethanol
Highly crystalline TiO2 and 3 wt% Nb-doped TiO2 nanorods were synthesized by a low-temperature surfactant directed hydrolysis method followed by calcination at 600-900 degrees C. The microstructure and the chemical composition of the thick films were characterized using XRD, SEM, EDX, TEM, XPS, and FUR. The sensing behavior of TiO2 thick films toward reducing gases (H-2, ethanol and LPG) in the temperature range 350-550 degrees C was studied. Niobium doping retards the anatase to rutile transformation. It was observed that doped TiO2 thick films have an enhanced sensor response compared to the undoped ones. The increased sensor response may be because of presence of anatase phase and the smaller dimension of the nanorods. (C) 2012 Elsevier B.V. All rights reserved.
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