Gas-sensing properties of In-Sn oxides composites synthesized by hydrothermal method
Gas-sensing properties of In-Sn oxides composites synthesized by hydrothermal method
复制标题
水热法合成In-Sn氧化物复合材料的气敏性能
DOI：
10.1016/j.snb.2016.04.042
复制
发表时间：
2016
影响因子：
8.4
通讯作者：
Lu Geyu
中科院分区：
文献类型：
--
作者：
Wang Qingji;Liu Fangmeng;Lin Jun;Lu Geyu
采用环境友好的水热法一步合成了In-Sn氧化物纳米复合材料。采用X射线衍射、场发射电子扫描显微镜、透射电子显微镜、电化学工作站和H2-TPR技术对复合材料的结构和形貌进行了表征。采用静态气敏系统研究了In-Sn氧化物复合材料对乙醇的气敏性能，并探讨了其气敏机理。在200 °C下，In-Sn氧化物复合材料对100 ppm乙醇（C2 H5 OH）的响应（Ra/Rg）为59.6，是锡氧化物的7.9倍。乙醇的增强响应可以归因于纳米复合材料的载流子浓度的变化和氧吸附的变化，由于形成丰富的异质结。
The In-Sn oxides composites made up of nanoparticles were successfully synthesized by an environment friendly one-step hydrothermal approach. The structures and morphologies of the composites were investigated by different kinds of techniques, including X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy, electrochemical workstation and H2-TPR technique. Their gas sensing performances of In-Sn oxides composites toward ethanol were investigated using a static system and possible gas-sensing mechanism were investigated. The response (Ra/Rg) of In-Sn oxides composites to 100 ppm ethanol (C2H5OH) was 59.6, which was 7.9 times higher than that of tin oxides at 200 °C. The enhanced response to ethanol can be attributed to the change of charge carrier concentration of the nanocomposites and the variation of oxygen adsorption due to the formation of abundant heterojunctions.