介孔二氧化锡纳米材料的臭氧气敏性能  

Ozone Gas-Sensing Properties of Mesoporous SnO_2 Nanomaterials

作　　者：洪玉元 孟柱[1] 许梦莹[1] 陈紫伟 杨静[1] 林志东[1] 

机构地区：[1]等离子体化学与新材料湖北省重点实验室(武汉工程大学),湖北武汉430074

出　　处：《武汉工程大学学报》2016年第6期554-559,共6页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(51072141)

摘　　要：以葡萄糖缩合的碳球为模板,由SnCl4水热反应制备介孔结构的二氧化锡纳米材料,通过X射线衍射、扫描电子显微镜和透射电镜等表征介孔材料的结构和形貌,发现制备的二氧化锡为四方晶系金红石结构,晶粒尺寸13.8 nm.以二氧化锡为敏感材料制作气敏元件,并测试了气敏元件在100℃～420℃温度范围内的气敏性能.结果表明在200℃时,介孔结构的二氧化锡气敏元件对体积分数为1×10^-4的臭氧的灵敏度为2 089,最低检测浓度低于3×10^-6（S=28）,气敏响应时间16s,恢复时间40 s.在此条件下,该气敏元件具有灵敏度高、检测浓度低、响应恢复快等优点,具有商业应用价值.Mesoporous SnO2 was prepared via hydrothermal process of SnCl4, using carbon spheres as the template by condensation reaction of glucose.The structure and morphology of the mesoporous SnO2 were characterized by X-ray Diffraction, Scanning Electronic Microscopy and Transmission Electron Microscopy. The mesoporous SnO2 possesses a tetragonal rutile structure with the grain size of 13.8 nm. The gas sensor was fabricated with the mesoporous SnO2 and its gas performances were investigated at 100 ℃-420 ℃. The results show that the sensitivity of mesporous SnO2 to volume fraction of 1×10^-4 ozone is 2 089 at 200 ℃, and the lowest detection concentration is less than volume fraction of 3×10^-6 （S=28）, the response time is 16 s and the recovery time is 40 s. The gas-sensing sensor possesses the properties of high sensitivity, low detection concentration and quick response/recovery under this condition, which has commercial value.

关 键 词：臭氧传感器 介孔二氧化锡 纳米材料 气敏 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]