ZHAO Xiao-hua, AN Na, LOU Xiang-dong, et al. Study on gas sensitivity of NiO doped with WO3[J]. 2008, (1): 58-60. DOI: 10.13873/j.1000-97872008.01.002.
WO3掺杂NiO的气敏性能研究
摘要
用水热法制备出NiO纳米粉体
对其进行了WO3系列掺杂。利用XRD对产物晶相结构进行表征
测试了掺杂材料的气敏性能。结果表明:适量WO3的掺杂明显改善了NiO材料的气敏性能
其中
掺杂质量分数为6%的气敏元件性能最好
350℃时对Cl2的灵敏度可达到37.5
200℃时对H2S的灵敏度可达30.4。说明该元件在不同温度下对不同气体具有选择性
且该元件对H2S响应恢复快。
Abstract
The nano powder NiO is prepared by hydrothermal methord
and is doped with WO3.The microstructure is analyzed by XRD.The gas sensitivity of doped materials is detected.The results show that the sensitivity of WO3-doped NiO sensor is higher than pure NiO sensor and the sensitivity of 6 % quality fraction WO3-doped NiO is best
which highest sensitivity to Cl2 is 37.5 at 350 ℃
while its sensitivity to H2S is 30.4 at 200 ℃.So the sensor has selectivity to different gases at different temperature.Also the sensor has sooner response and recovery to H2S.