介孔二氧化锡纳米材料的臭氧气敏性能

发布时间：2018-02-15 03:35

  本文关键词： 臭氧传感器 介孔二氧化锡 纳米材料 气敏　出处：《武汉工程大学学报》2016年06期 　论文类型：期刊论文

【摘要】：以葡萄糖缩合的碳球为模板,由Sn Cl4水热反应制备介孔结构的二氧化锡纳米材料,通过X射线衍射、扫描电子显微镜和透射电镜等表征介孔材料的结构和形貌,发现制备的二氧化锡为四方晶系金红石结构,晶粒尺寸13.8 nm.以二氧化锡为敏感材料制作气敏元件,并测试了气敏元件在100℃~420℃温度范围内的气敏性能.结果表明在200℃时,介孔结构的二氧化锡气敏元件对体积分数为1×10-4的臭氧的灵敏度为2 089,最低检测浓度低于3×10-6(S=28),气敏响应时间16 s,恢复时间40 s.在此条件下,该气敏元件具有灵敏度高、检测浓度低、响应恢复快等优点,具有商业应用价值.
[Abstract]:The mesoporous tin dioxide nanomaterials were prepared by hydrothermal reaction of Sn Cl4 with glucose condensed carbon spheres. The structure and morphology of mesoporous materials were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. It is found that the prepared tin dioxide is a tetragonal rutile structure with a grain size of 13.8 nm. The gas sensing element is fabricated with tin dioxide as a sensitive material, and the gas sensing properties of the gas sensor are measured in the temperature range of 100 鈩，

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