Structure and mass spectrometry study of nanometer Sn-α-Fe2O3 carbon monoxide sensor materials
The Sn-α-Fe2O3 is one kinds of gas sensor materials, which is evolved from α-Fe2O3. In this paper, Sn-α-Fe2O3 was fabricated by liquid phase coprecipitation, and the carrier concentration was adjusted by the n-type Sn dopant. The particle morphology was examined by TEM, the lattice parameter was determined by XRD, and the surface area to mass ratio S0 was determined by BET. The mass spectrum was used to determinate absorption properties and the absorption mechanism. It was found that the Sn-α-Fe2O3 particle was taken the shape of needle, and the long axis was about 120 nm and the short axis was 30nm. The resistivity could be improved by Sn dopant. The S0 was proportional to the Sn dopant content of the Sn-α-Fe2O3. Mass spectrometry results showed that the change of the resistivity was due to the change of the carrier concentration.
Nanometer materials α-Fe2O3 Sn-α-Fe2O3 CO Gas sensor
秦会斌 陈冠群
杭州电子科技大学电子信息材料与器件实验室,浙江杭州,310018 四川师范大学分析中心,四川成都,610066
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）