摘要
The sensitivity and the recovery behavior of SnO_2-based gas sensor prepared from a commercial SnO_2 powder were tested under the low concentration of DMMP(0.5μg/g) in the flow system at 350℃.In order to improve the sensitivity of the sensor,promoters such as NiO,Nb_2O_5,MoO_3,and Sb_2O_3 were added into SnO_2 powder.The sensitivities were increased up to 80% from 50% but they were not recovered.Only the SnO2-based gas sensor promoted with MoO_3 and Sb_2O_3 was recovered after detection of DMMP,although the recovery rate was slow.In particular,the SnO_2-based sensor promoted with 5wt% of MoO_3 and 1wt% of Sb_2O_3 simultaneously showed an complete recovery ability,though its sensitivity was 40% which was lower than that of SnO_2 gas sensor without promoters.This ability was discussed in terms of catalytic roles of promoters.
The sensitivity and the recovery behavior of SnO2-based gas sensor prepared from a commercial SnO2 powder were tested under the low concentration of DMMP（0.5μg/g） in the flow system at 350℃. In order to improve the sensitivity of the sensor, promoters such as NiO, Nb2O5, MOO3, and Sb2O3 were added into SnO2 powder. The sensitivities were increased up to 80% from 50% but they were not recovered. Only the SnO2-based gas sensor promoted with MoO3 and Sb203 was recovered after detection of DMMP, although the recovery rate was slow. In particular, the SnO2-based sensor promoted with 5wt% of MoO3 and 1wt% of Sb203 simultaneously showed an complete recovery ability, though its sensitivity was 40% which was lower than that of SnO2 gas sensor without promoters. This ability was discussed in terms of catalytic roles of promoters.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A03期155-156,共2页
Rare Metal Materials and Engineering
