Fabrication of n-SnO2/Polyaniline chemiresistors for room temperature NO2 detection
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https://doi.org/10.54939/1859-1043.j.mst.114.2026.121-127Keywords:
Gas sensor; NO2; Composite polyaniline.Abstract
The SnO2/PANi composite was successfully synthesized by electrospinning combined with in-situ chemical oxidative polymerization. The material formed interconnected porous particle clusters with crystallite sizes of 10 - 50 nm, providing favorable diffusion pathways and active adsorption sites. The sensor exhibited a reversible room-temperature response to NO2, with increased resistance and good linearity in the 1 - 20 ppm range (R2 = 0.96995). It also showed preferential sensitivity to NO2 over H2S and SO2, although SO2 interference became more significant at high concentrations. These results indicate that SnO2/PANi is a promising material for room-temperature NO2 gas sensor applications.
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