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Nitrogen dioxide (NO2) is one of the most toxic gases required to be detected and controlled for industrial safety or environmental monitoring devices [1,2]. Thus, NO2 detection has continuously gained substantial interest and novel materials have been continuously explored for effective NO2 detection. In this work, the 0 1 wt% Y doped SnO2 nanoparticles were productively synthesized by flame spray pyrolysis in a single step and then fabricated as gas sensor for sensitive detection of NO2. The as prepared nanoparticles and their fabricated sensing films were structurally characterized by Xray diffraction, Energy-dispersive X-ray spectroscopy, nitrogen adsorption, and electron microscopy. The results confirmed that SnO2 nanoparticles were highly crystalline and YOx species might form a solid solution in SnO2 matrix. For the gas sensing measurements, fabricated sensors were evaluated at various NO2 concentrations and operating temperatures ranging from 150 350 C in dry air. The test data showed that the optimal 0.1 wt% Y-doped SnO2 sensing films exhibited a very large sensor response of ~14200 towards 5 ppm NO2 at 200 C, which is two orders of magnitude higher than that of undoped SnO2 sensors. In addition, the optimal 0.1 wt% Y doped SnO2 sensor displayed high stability as well as high selectivity against other environmental gases. Consequently, the Y doped SnO2 nanoparticulate sensor is a promising candidate for highly sensitive and selective NO2 detection and may be useful in environmental and industrial applications.

P1GS.9 - Flame spray made Y doped SnO2 Nanoparticulate Thick Films for Highly Sensitive NO2 Detection