水热法合成SnO_2微球的酒敏特性研究  

Hydrothermae Synchesis of SnO_2 Microspheres and Their Application in C_2H_5OH Sensor

作　　者：徐甲强[1] 秦利鹏[1] 董晓雯[1] 向群[1] 潘庆谊[1] 

机构地区：[1]上海大学理学院化学系

出　　处：《传感技术学报》2007年第7期1461-1463,共3页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金资助(20471055);上海市教委科研项目资助(07ZZ12)

摘　　要：采用分析纯的SnCl4.5H2O和NaOH为起始原料,在160℃温度条件下水热法反应12 h得到SnO2微球.利用X射线衍射仪(XRD)、扫描电镜(SEM)对合成材料的结构、尺寸和形态进行了表征;采用静态配气法测试了材料的气敏性能.研究结果表明:在160℃水热条件下一步合成了均分散的SnO2微球,粒径大约为200 nm.用其制作的旁热式气敏元件在5 V工作电压下对0.005%的C2H5OH的灵敏度为8.7,达到了口腔酒精气体浓度检测限度0.008%的要求,并且响应-恢复特性良好.SnO2 microspheres were synthesized via a hydrothermal process at the temperature of 160 ℃ for 12 h using analytically pure SnC14· 5H2O and NaOH as raw materials. The micropowder was characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. As a result, the SnO2 microspheres have well-degree of dispersion and small diameter. The diameter is about 200 nm. The gas sensitivity of the material was also tested, the results show that the as-prepared powder has good sensitivity value 8. 7 to C2H5OH （0. 005%） at 5 V working voltage with quick response and recovery behavior, exceeded the low-level ethanol vapor （0. 008%） in human breath.

关 键 词：氧化锡 气体传感器 酒精传感器 水热反应 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]