摘要
SnO_2 nanpowder was prepared by sol-gel method.The SnO_2 based formaldehyde sensor with the doping of La_2O_3 (5wt%)-ZnO(3wt%) was fabricated.The range of the detecting concentration for formaldehyde is from 10μg/g to 300μg/g at 140℃.The sensitivity (S=R_0/R_g) to 10μg/g formaldehyde is 2 and to 300μg/g formaldehyde is 16.The 0.4 nm molecule-sifter layer was coated on the surface of SnO_2 material,the result shows that the selectivity of the formaldehyde sensor is improved. The La_2O_3-ZnO doped SnO_2 sensor shows better stability during 60 days testing.
SnO2 nanpowder was prepared by sol-gel method. The SnO2 based formaldehyde sensor with the doping of La203 （5wt%）-ZnO（3wt%） was fabricated. The range of the detecting concentration for formaldehyde is from 10 μg/g to 300 p,g/g at 140℃. The sensitivity （S=Ro/Rg） to 10μg/g formaldehyde is 2 and to 300 μg/g formaldehyde is 16. The 0.4 nm molecule-sifter layer was coated on the surface of SnO2 material, the result shows that the selectivity of the formaldehyde sensor is improved. The La2O3-ZnO doped SnO2 sensor shows better stability during 60 days testing.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A03期129-131,共3页
Rare Metal Materials and Engineering
