期刊
SENSOR LETTERS
卷 9, 期 1, 页码 26-30出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/sl.2011.1412
关键词
TiO2 Nanotube; Microstructure Control; Organic Gas Sensing; Au Loading
The loading of noble metals was carried out to enhance the gas sensing characteristics of TiO2 nanotube-based sensors. Using a photochemical deposition method, Au nanoparticles were successfully deposited on TiO2 nanotubes prepared by a hydrothermal method in a highly-dispersed state. The sensor device using a porous film composed of the Au-loaded (0.5 wt%) TiO2 nanotubes exhibited improved sensor responses to 10-50 ppm toluene in air at 500 degrees C. The sensor response was about two times higher than that of a sensor using commercial TiO2 nanoparticles (degussa P-25). The results demonstrate that the Au loading is a very efficient method for improving the sensing characteristics of TiO2 nanotube-based sensors operative at high temperatures.
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