氧化铟纳米管的制备及它的甲苯气敏特性研究

Abstract： The pristine In2O3 nanotubes were synthesized by electrospinning and subsequent calcination. Scanning electron microscope, X-ray powder diffraction and transmission electron micrograph were employed to analyze the morphology and crystal structure of the as-synthesized nanotubes. Gas-sensing properties of the as-synthesized In203 nanotubes were investigated by exposing the corresponding sensors to toluene, acetone, ethanol, formalde- hyde, ammonia and carbon monoxide at 340 ℃. The results show that the gas sensor possesses a good selectivity to toluene at 340 ℃. The response of the In2O3 nanotube gas sensor to 40 ppm is about 5.88. The response and recovery times are about 3 s and 17 s, respectively.     

壳状氧化锌的制备及其对丙酮的敏感特性EI北大核心CSCD

采用水热法制备了壳状氧化锌。利用扫描电子显微镜、X射线衍射对样品的结构和形貌进行了表征。以该壳状氧化锌作为敏感材料制成旁热式结构的气体传感器样品,检测了样品在不同温度下对丙酮气体的灵敏度。结果表明:在300℃条件下,当丙酮的质量分数为100×10–6时,样品对丙酮气体的灵敏度为24.8,响应时间和恢复时间分别为2 s和3 s。另外,还测试了传感器对于常见干扰气体的灵敏度,表明器件具有良好的选择性。