TY - JOUR
T1 - Growth and characterization of pure and doped SnO2 films for H2 gas detection
AU - Lin, Chang Hung
AU - Chang, Wei Che
AU - Qi, Xiaoding
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan, ROC under the grant number: 99-2221-E-006-129-MY3.
PY - 2012
Y1 - 2012
N2 - Pure and the transition metal (TM) doped SnO2 films were prepared by the sol-gel method. The surface morphology and microstructure of the grown films were characterized by a wide range of techniques. Generally, various TM doping resulted in a reduction of the particle size, as well as a smaller size of various surface features. The films were tested for the gas sensing applications. In the air containing 500 ppm H2, the optimum operating temperature for the pure SnO2 films was 250 °C, which showed a sensitivity of S=3.9 and a recovery time of 84 s. Doping of 5 at% W increased the sensitivity significantly (S=25.8) at the same operating temperature, while the recovery time was reduced to 72 s. For the 5at% Pd doped SnO2 films, the sensitivity was only slightly improved (S=4.4), however they showed the quickest recovery time of 60 s. Doping of Mn did not improve the H2 sensing sensitivity and the doped films showed a poor thermal stability at the elevated temperatures.
AB - Pure and the transition metal (TM) doped SnO2 films were prepared by the sol-gel method. The surface morphology and microstructure of the grown films were characterized by a wide range of techniques. Generally, various TM doping resulted in a reduction of the particle size, as well as a smaller size of various surface features. The films were tested for the gas sensing applications. In the air containing 500 ppm H2, the optimum operating temperature for the pure SnO2 films was 250 °C, which showed a sensitivity of S=3.9 and a recovery time of 84 s. Doping of 5 at% W increased the sensitivity significantly (S=25.8) at the same operating temperature, while the recovery time was reduced to 72 s. For the 5at% Pd doped SnO2 films, the sensitivity was only slightly improved (S=4.4), however they showed the quickest recovery time of 60 s. Doping of Mn did not improve the H2 sensing sensitivity and the doped films showed a poor thermal stability at the elevated temperatures.
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U2 - 10.1016/j.proeng.2012.03.069
DO - 10.1016/j.proeng.2012.03.069
M3 - Conference article
AN - SCOPUS:84872869192
SN - 1877-7058
VL - 36
SP - 476
EP - 481
JO - Procedia Engineering
JF - Procedia Engineering
T2 - 2011 IUMRS International Conference in Asia, ICA 2011
Y2 - 19 September 2011 through 22 September 2011
ER -