Chen T, Liu Q J, Zhou Z L, Wang Y D
Department of Materials Science and Engineering, Yunnan University, 650091 Kunming, People's Republic of China.
Nanotechnology. 2008 Mar 5;19(9):095506. doi: 10.1088/0957-4484/19/9/095506. Epub 2008 Feb 11.
The gas-sensing characteristics of In(2)O(3) and CdO doped nanocrystalline SnO(2) compounds for formaldehyde were investigated in this study. The phases of the resulting materials and the morphologies of the sensing layers were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Indirect-heating sensors using SnO(2)-In(2)O(3)-CdO compounds as sensitive materials were fabricated on an alumina tube with Au electrodes and platinum wires. All measurements were performed at several operating temperatures from 100 to 180 °C. Good gas-sensing responses to formaldehyde have been found for all the prepared samples. It is shown that the sensors exhibited high sensitivity at low operating temperature (133 °C), making them promising candidates for practical detectors for formaldehyde.
本研究考察了In(2)O(3)和CdO掺杂的纳米晶SnO(2)化合物对甲醛的气敏特性。分别通过X射线衍射（XRD）和扫描电子显微镜（SEM）对所得材料的相和传感层的形貌进行了表征。以SnO(2)-In(2)O(3)-CdO化合物为敏感材料的间接加热传感器在带有金电极和铂丝的氧化铝管上制备而成。所有测量均在100至180°C的几个工作温度下进行。已发现所有制备的样品对甲醛都有良好的气敏响应。结果表明，这些传感器在低工作温度（133°C）下表现出高灵敏度，使其成为甲醛实际探测器的有前途的候选者。
