A Novel SnO2 Sensor and its Selectivity Improvement with Catalytic Filter

We present a new organometallic approach for the preparation of nanostructured SnO2 gas sensitive layer. The deposited sensitive layer on a silicon device shows high response to 100 ppm of CO and C3H8. In order to improve the sensor selectivity we have implemented a catalytic filter material in a cap placed just above the sensing device. The catalytic filter is made of zinc oxide supported gold nanoparticles (Au@ZnO) prepared by deposition-precipitation by urea (DPU) method. This catalytic filter, operated at room temperature and under humid atmosphere (HR 50%), allowed to selectively eliminate the sensor response under 100 ppm of CO, whereas the sensor always responds to 100 ppm of C3H8.

Keywords

organometallic approach catalytic filters SnO2 gas sensors

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Chemical Sciences

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EUROSENSORS Abstract SnO2-1.pdf (213.38 Ko)

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Submitted on : Tuesday, March 19, 2019-8:35:52 AM

Last modification on : Monday, October 28, 2024-6:05:44 PM

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Dates and versions

hal-02023256 , version 1 (19-03-2019)

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HAL Id : hal-02023256 , version 1
DOI : 10.1016/j.proeng.2014.11.306

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Justyna Jońca, Katia Fajerwerg, Myrtil L. Kahn, Andrey Ryzhikov, Loïc Joanny, et al.. A Novel SnO2 Sensor and its Selectivity Improvement with Catalytic Filter. Eurosensors 2014, Sep 2014, Brescia, Italy. pp.923-926, ⟨10.1016/j.proeng.2014.11.306⟩. ⟨hal-02023256⟩

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