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Study on a micro-gas sensor with SnO2–NiO sensitive film for indoor formaldehyde detection

Abstract : A micro-gas sensor is fabricated based on a micro-hotplate (MHP) with micromachining technology. The SnO2–NiO nanometer polycrystalline composite synthesized by a chemical co-precipitation method is coated onto a micro-hotplate as a sensitive film. The response and recovery time of the micro-gas sensor decrease rapidly with increasing the formaldehyde (HCHO) concentration at relatively low concentrations. The micro-gas sensor shows good stability, low power consumption of 180 mW at the MHP operation temperature of 300 °C, and high selectivity in the presence of interference gases such as alcohol, toluene, -pinene and acetone. The micro-gas sensor can detect 0.06 ppm HCHO, which is the indoor exposure limit for HCHO referring to Chinese environmental protection agency (EPA).
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http://hal.in2p3.fr/in2p3-00294752
Contributor : Yvette Heyd <>
Submitted on : Thursday, July 10, 2008 - 2:05:55 PM
Last modification on : Friday, May 8, 2020 - 1:10:18 AM

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P. Lv, Z.A. Tang, J. Yu, F.T. Zhang, G.F. Wei, et al.. Study on a micro-gas sensor with SnO2–NiO sensitive film for indoor formaldehyde detection. Sensors and Actuators B: Chemical, Elsevier, 2008, 132, pp.74-80. ⟨10.1016/j.snb.2008.01.018⟩. ⟨in2p3-00294752⟩

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