一种检测用气敏传感器材料制备及应用效果  

Material preparation and application effect of a gas-sensitive sensor for detection

作　　者：邹英杰 刘延锋 ZOU Ying-jie;LIU Yan-feng(Weifang Ecological Environment Monitoring Center,Weifang 261041,China)

机构地区：[1]山东省潍坊生态环境监测中心,山东潍坊261041

出　　处：《化学工程师》2023年第12期112-115,共4页Chemical Engineer

摘　　要：针对传统金属半导体气敏传感器在甲醛气体检测时灵敏度低和选择性差的问题,通过静电纺丝法制备基于复合纳米材料的气敏传感器,并对制备的材料及传感器性能进行验证。结果表明,本实验制备的复合纳米气敏材料呈现网状,且氧空位更多,同时含有Cd^(2+)和In^(3+)的特征峰;传感器性能测试表明,传感器的最佳响应温度为133℃;传感器的响应时间和恢复时间分别为7s和13s,明显少于单一材料的传感器响应时间;浓度特性测试可知,在不同甲醛浓度下气敏传感器的响应浓度表现出良好的线性关系,相关系数R2=0.9983;在性质接近的复杂气体环境测试中,本实验制备的传感器可准确的测量甲醛气体,而且不受干扰。由此可见,本实验制备的气敏材料及传感器具备较高的灵敏性和可选择性。Aiming at the low sensitivity and poor selectivity of traditional metal semiconductor gas sensors in formaldehyde gas detection,the gas sensors based on composite nano materials were prepared by electrospinning,and the properties of the prepared materials and sensors were verified.The results show that the composite nano gas sensing materials prepared in this experiment present a network,and the gas sensing materials prepared in this experiment have more oxygen vacancies and contain characteristic peaks of Cd^(2+)and In^(3+);The performance test of the sensor shows that the optimal response temperature of the sensor is 133℃;The response time and recovery time of the sensor are 7s and 13s respectively,which are obviously less than those of the sensor with single material;The concentration characteristic test shows that the response concentration of the gas sensor shows a good linear relationship under different formaldehyde concentrations,and the correlation coefficient R^(2)=0.9983;In the complex gas environment test with similar properties,the sensor prepared in this test can accurately measure formaldehyde gas without interference.Therefore,the gas sensing materials and sensors prepared in this experiment have high sensitivity and selectivity.

关 键 词：气敏材料 重复特性 金属半导体材料 响应性能 

分 类 号：TQ031[化学工程]