摘要
以钨酸钠(Na_2WO_4·2H_2O)为原料,采用水热法制备出纳米片状WO_3,并用X射线衍射仪和扫描电镜对产物的组成及形貌进行表征。将该纳米材料制作成气敏元件,对不同浓度的NO_2气体进行测试。结果表明,所制备的传感器对低浓度的NO_2气体有良好的灵敏度,响应和恢复时间分别只需5 s和130 s。
Nano WO3 powder had been synthesized through acidification of Na2WO4￠2H2O by hydrothermal synthesis. Compositionand morphology of the specimens were characterized by SEM and X-ray diffraction. The gas sensing studies were performed by varyingthe concentration of NO2 and gas sensor is made by nano materials. The results revealed that nanosheet-WO3 sensor exhibited enhancedsensing performance to low concentration of NO2. The response and recovery times are 5 s and 130 s, respectively.
出处
《上海第二工业大学学报》
2016年第2期112-117,共6页
Journal of Shanghai Polytechnic University
基金
国家自然科学基金(No.61471233)
上海高校特聘教授(东方学者)计划
上海市科委基础研究重点项目(No.13NM1401300)
上海市教委曙光计划(No.14SG52)资助
