摘要
将PtO Pt纳米粒子膜与TiO2 ,SnO2 纳米粒子膜复合 ,利用PtO Pt纳米粒子膜作为插入电极和催化剂 ,设计并研制出一类新型双层结构复合膜气体传感器 .采用TEM和SEM对薄膜的显微结构进行了表征 .对空气中 4 0 %H2 的氢敏性能研究表明 :2 0 0℃时 ,TiO2 /PtO Pt复合膜对氢气的灵敏度为 70 % ,而TiO2 纳米粒子膜无响应 .10 0℃时 ,SnO2 /PtO Pt复合膜的灵敏度为 92 % ,同样条件下 ,SnO2 纳米粒子膜的灵敏度仅为 4% .说明PtO Pt纳米粒子膜的催化作用能够显著提高TiO2 和SnO2 膜的氢敏性能 .另外 ,TiO2 /PtO Pt复合膜和SnO2 /PtO Pt复合膜均对空气中H2
Combining a granular thin film of PtO-Pt with a film of TiO2 or SnO2 nanoparticles, we have designed and successfully prepared a new type of hydrogen sensors with a dual-layer structure. Microstructures of the prepared sensors were characterized by TEM and HRSEM. Measurements on the sensitivities, of the prepared sensors to 4.0% H-2 in air reveal that the sensitivity of Ti-2/PtO-Pt is about 70% at 200 degreesC, while that of SnO2/PtO-Pt at 100 degreesC is up to 92%. The high sensitivities of the prepared dual-layer films sensors at relatively low temperature are derived from the catalytic function of the PtO-Pt granular film. In addition, both TiO2/PtO-Pt and SnO2/PtO-Pt show a high selectivity to hydrogen in air.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2003年第1期8-12,共5页
Acta Chimica Sinica
基金
国家重点基础发展规划项目 (No.2 0 0 0 0 7750 3)
国家杰出青年科学基金项目 (No.2 992 530 8)
国家自然科学基金项目 (No.90 2 0 60 1 1 )资助
