A novel highly sensitive and selective H2 S gas sensor at low temperatures based on SnO2 quantum dots-C60 nanohybrid: Experimental and theory study

Talanta
Sahar KeshtkarNosrat Izadi

Abstract

In this study, SnO2 quantum dots-fullerene (SnO2 QDs-C60) nanohybrid as novel sensing material was synthesized by a simple hydrothermal method. The structure and morphology of the synthesized sample were studied by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The prepared hybrid was used as gas sensors for detection of different gasses including 70 ppm H2S, 1% methane, and 1% propane at low temperatures of 100-200 °C. The results indicated that the SnO2 QDs-C60 nanohybrid has high response and high selectivity to 70 ppm H2S, 1% methane, and 1% propane gasses at low temperatures. The highest response (Rair/Rgas) of 66.0 and 5.4-70 ppm H2S and 1% methane gasses at 150 °C and the response of 2.7-1% propane at 200 °C were observed for the prepared nanohybrid gas sensor. Moreover, the prepared sensor showed a good selectivity toward H2S gas. Also, DFT calculations were used for studying the interaction of these gases with SnO2-C60. DFT results showed that H2S has the strongest interaction and the highest effect on band-gap variation which is in a good agreement with experimental results.

References

Sep 12, 2009·Journal of Hazardous Materials·S RastegarzadehI Saeedi
Oct 8, 2009·Nanotechnology·Ganhua LuJunhong Chen
Apr 1, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Junlong TianDi Zhang

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Citations

Oct 23, 2020·Angewandte Chemie·Alain R Puente SantiagoLuis Echegoyen

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