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Fast formaldehyde gas sensing response properties of ultrathin SnO2 nanosheets

机译:超薄SnO2纳米片的快速甲醛气敏响应特性

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摘要

Ultrathin SnO2 nanosheets have been successfully synthesized through a simple low temperature hydrothermal strategy and developed for formaldehyde gas detection. Morphology characterizations are confirmed by the results of FESEM, TEM and HRTEM. The ultrathin SnO2 nanosheets are configured as high performance sensors to detect formaldehyde, and show very fast response times (<1 s), recovery times (6 s), good repeatability and selectivity at a relatively low working temperature. The high sensitivity performances are attributed to the morphology characterizations of ultrathin SnO2 nanosheets for affording large specific surface areas and more direct conduction pathways. The growth mechanism of the ultrathin SnO2 nanosheets and a morphology dependent sensing mechanism are proposed.
机译:超薄SnO2纳米片已经通过简单的低温水热策略成功合成,并开发用于甲醛气体检测。 FESEM,TEM和HRTEM的结果证实了形态特征。超薄SnO2纳米片被配置为检测甲醛的高性能传感器,并在相对较低的工作温度下显示出非常快的响应时间(<1 s),恢复时间(6 s),良好的重复性和选择性。高灵敏度性能归因于超薄SnO2纳米片的形态特征,可提供较大的比表面积和更直接的传导途径。提出了超薄SnO2纳米片的生长机理和形态依赖的传感机理。

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