以SnO_2纳米颗粒为敏感电极的阻抗型氢气传感器的研究  

Research of the impedance hydrogen sensors for SnO_2 as the sensing material

作　　者：赵兵建[1] 王岭[1] 何承[2] 戴磊[1] 

机构地区：[1]河北联合大学化学工程学院,河北唐山063009 [2]北京理工大学化工与环境学院,北京100081

出　　处：《功能材料》2011年第B11期938-941,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50772030;50972038)

摘　　要：采用浸渍法在Ce0.9Gd0.1O1.95（CGO）固体电解质骨架中制备敏感材料SnO2,并组装成氢气传感器。利用XRD、SEM对氢气传感器的相组成及微观形貌进行表征,采用IM6e型电化学工作站对传感器气敏性能进行测试。结果表明浸渍法制备的敏感材料SnO2颗粒细小,约为400nm左右;在400-550℃时,传感器阻抗值随氢浓度的增加而减小,且传感器信号与氢气浓度表现出非常良好的线性关系。随着温度升高,传感器的信号响应速度逐渐增加,在550℃、氢浓度为1.0×10-3时,其90%的响应时间为170s。The sensing material SnO2 was made in the framework of the solid electrolyte Ce0.9Gd0.1O1.95（CGO） by using the infiltrating way,and hydrogen sensors were fabricated.The morphology and phase composition of hydrogen sensors were observed by XRD and SEM.The gas sensing properties of the sensors were measured by IM6e electrochemical workstation.The results showed that the particle size of sensing material SnO2 was about 400nm.The impedances of sensors obviously were decreasing with increasing H2 concentrations at 400-550℃.The sensors response and H2 concentrations showed good linear relationship.The response signal rate of sensors was gradually promoting with increasing temperatures.At 550℃,90% response time of sensors signal was about 170s with H2 concentrations at 1.0×10-3.

关 键 词：SNO2 CGO 氢气传感器 阻抗值 

分 类 号：O614.3[理学—无机化学]