TY - JOUR
T1 - Spin-coated thin films of SiO2-WO3 composites for detection of sub-ppm NO2
AU - Wang, Xusheng
AU - Sakai, Go
AU - Shimanoe, Kengo
AU - Miura, Norio
AU - Yamazoe, Noboru
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research from The Ministry of Education, Science, Sports and Culture of Japan, and a grant from Steel Industry Foundation for the Advancement of Environmental Protection Technology.
PY - 1997/12/1
Y1 - 1997/12/1
N2 - Thin films of SiO2-WO3 composites with various SiO2 contents (0-20 wt%) were prepared by means of sol-gel method. The grain size of WO3 decreased with increasing SiO2 content, resulting in an increase in NO2 sensitivity. On the other hand, the response transient to NO2 was brought to be the quickest at 5% SiO2. The thin film of SiO2(5%)-WO3 was far more sensitive to NO2 than the thin film or sintered block of pure WO3. It could detect dilute NO2 (0.1-2 ppm) in air at 350°C sensitively and fairly selectively. The NO2 sensing characteristics were stable over the whole test period of 10 days.
AB - Thin films of SiO2-WO3 composites with various SiO2 contents (0-20 wt%) were prepared by means of sol-gel method. The grain size of WO3 decreased with increasing SiO2 content, resulting in an increase in NO2 sensitivity. On the other hand, the response transient to NO2 was brought to be the quickest at 5% SiO2. The thin film of SiO2(5%)-WO3 was far more sensitive to NO2 than the thin film or sintered block of pure WO3. It could detect dilute NO2 (0.1-2 ppm) in air at 350°C sensitively and fairly selectively. The NO2 sensing characteristics were stable over the whole test period of 10 days.
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U2 - 10.1016/S0925-4005(97)00286-4
DO - 10.1016/S0925-4005(97)00286-4
M3 - Article
AN - SCOPUS:0031366654
VL - 45
SP - 141
EP - 146
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 2
ER -