Abstract
SnO2 has been confirmed to be a potential sensor to many toxic volatile gases. We report here the synthesis of porous SnO2 nanoflowers by in situ oxidization of SnS and SnS2 precursors with similar morphologies. The as-synthesized SnO2 products were characterized by FESEM, XRD, TEM, UV-vis spectrometry, fluorescence spectrometry and the nitrogen adsorption–desorption technique. Configured as resistor-type chemical sensors, the as-synthesized SnO2 products exhibited excellent sensitivity and fast response/recovery times towards different gases including ethanol, methanol, methanal and acetone. After Pt nanoparticles were loaded, their sensing properties were dramatically increased, indicating their promising applications in detecting toxic volatile organic materials.
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