文献类型：期刊文献

英文题名：Fe/SnO₂ Composite Sensors Prepared from Oxalate Precursors for the Detection of H₂S

作者：Sun, Hua[1];Li, Xiangqing[1];Sun, Huiping[1];Zheng, Zhen[1];Kang, Shi-Zhao[1];Mu, Jin[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2010

卷号：31

期号：1

起止页码：124

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000275860200018)】；

语种：英文

外文关键词：Composite; gas sensor; hydrogen sulfide; iron oxide; tin dioxide

摘要：Fe/SnO2 composites were prepared from oxalate precursors annealing at 500 degrees C. The structures and morphologies of Fe/SnO2 composites were characterized with scanning electron microscopy and x-ray diffraction. The Fe/SnO2 composites showed faster response and recovery to H2S than the flowerlike clusters of SnO2 nanorods. The response of the composite sensors decreased with increasing temperature and increased with the increment of the Fe content. The highest response of the Fe/SnO2 composite sensors can be achieved to be 67.9 for 50 ppm H2S at 250 degrees C. The results show that the addition of Fe enhances the sensitivity to H2S and shortens the response and recovery time of the sensors.