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MgO掺杂SnO2甲醛传感器的气敏性能

刘咏梅 张思凡 刘敏 李芳

刘咏梅, 张思凡, 刘敏, 李芳. MgO掺杂SnO2甲醛传感器的气敏性能[J]. 华南师范大学学报(自然科学版), 2020, 52(3): 48-53. doi: 10.6054/j.jscnun.2020043
引用本文: 刘咏梅, 张思凡, 刘敏, 李芳. MgO掺杂SnO2甲醛传感器的气敏性能[J]. 华南师范大学学报(自然科学版), 2020, 52(3): 48-53. doi: 10.6054/j.jscnun.2020043
LIU Yongmei, ZHANG Sifan, LIU Min, LI Fang. Gas Sensing Properties of the MgO Doped SnO2 Formaldehyde Sensor[J]. Journal of South China normal University (Natural Science Edition), 2020, 52(3): 48-53. doi: 10.6054/j.jscnun.2020043
Citation: LIU Yongmei, ZHANG Sifan, LIU Min, LI Fang. Gas Sensing Properties of the MgO Doped SnO2 Formaldehyde Sensor[J]. Journal of South China normal University (Natural Science Edition), 2020, 52(3): 48-53. doi: 10.6054/j.jscnun.2020043

MgO掺杂SnO2甲醛传感器的气敏性能

doi: 10.6054/j.jscnun.2020043
基金项目: 

广东省普通高校青年创新人才项目 2018KQNCX391

广东省普通高校青年创新人才项目 2017KQNCX272

详细信息
    通讯作者:

    刘咏梅,讲师,Email:amonliu2013@163.com

  • 中图分类号: TN305.3

Gas Sensing Properties of the MgO Doped SnO2 Formaldehyde Sensor

  • 摘要: 用MgO掺杂SnO2材料(SnO2/MgO)研制了旁热式甲醛传感器,采用紫外光激发的方式使传感器能在室温下工作.利用X射线衍射仪、热场发射扫描电镜、比表面积与孔隙率分析仪对SnO2和SnO2/MgO材料进行了物相组成、微观形貌的表征和比表面积的测定,并在不同退火温度、不同紫外光照射强度下对传感器进行了性能测试.结果表明:掺杂后的材料比表面积更大、吸附能力更强,当退火温度为650 ℃、紫外光照射强度为1.75 mW/cm2时SnO2/MgO传感器的灵敏度最好.在以相同体积分数的O2、C2H6O作为干扰气体时,SnO2/MgO气敏传感器对甲醛具有良好的选择性.研究结果为探索高灵敏的甲醛检测新技术提供了参考.
  • 图  1  旁热式气敏传感器结构示意图

    Figure  1.  The schematic diagram of the side-heating gas sensor

    图  2  SnO2与SnO2/MgO材料的SEM图

    Figure  2.  The SEM images of SnO2 and SnO2/MgO

    图  3  SnO2和SnO2/MgO材料的BET曲线

    Figure  3.  The BET curves of SnO2 and SnO2/MgO

    图  4  SnO2和SnO2/MgO的XRD谱

    Figure  4.  The XRD patterns of SnO2 and SnO2/MgO

    图  5  在不同退火温度下制备材料的表面电流随HCHO体积分数的变化

    Figure  5.  The change of surface current with HCHO volume fraction at different annealing temperatures

    图  6  不同紫外光强度下传感器的灵敏度变化

    Figure  6.  The sensor sensitivity change under different UV light intensities

    图  7  SnO2/MgO传感器的选择性

    Figure  7.  The selectivity of the SnO2/MgO sensor

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出版历程
  • 收稿日期:  2019-07-19
  • 刊出日期:  2020-06-25

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