摘要
<正>The influence of Yb_2O_3 and Pr_2O_3 doping on electrical and gas sensing properties of tin dioxide was studied.A doping content of 0.5wt%～5wt% was investigated by mechanical mixing.The significant improvement on sensitivity and selectivity to 200μg/g hydrogen sulphide gas has been achieved by 3wt% Pr_2O_3 and 5wt% Yb_2O_3 adding.The better response and revovery properties of Pr or Yb doped tin dioxide sensor for 200μg/g hydrogen sulphide gas were found.The maximum sensitivity to H_2S gas is observed at about 120℃.Pr has stronger catalysis than Yb for H_2S reaction on SnO_2 surface.S~ 2-) was oxidized to S~ 6+) on the SnO_2 surface according to XPS.
The influence of Yb203 and Pr203 doping on electrical and gas sensing properties of tin dioxide was studied. A doping content of 0.5 wt%-5 wt% was investigated by mechanical mixing. The significant improvement on sensitivity and selectivity to 200 p.g/g hydrogen sulphide gas has been achieved by 3 wt% Pr203 and 5 wt% Yb203 adding. The better response and revovery properties of Pr or Yb doped tin dioxide sensor for 200 μg/g hydrogen sulphide gas were found. The maximum sensitivity to H2S gas is observed at about 120℃. Pr has stronger catalysis than Yb for H2S reaction on SnO2 surface. S2 was oxidized to S6＋ on the SnO2 surface according to XPS.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A03期21-24,共4页
Rare Metal Materials and Engineering
