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

17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
P-1 - Gas Sensors
A. Wisitsoraat - Carbon-based Devices and Nanoelectronics Laboratory, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathumthani (Thailand), A. Tuantranont, S. Phanichphant - Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai (Thailand), K. Bunpang, D. Kaewsiri, S. Homnan, C. Liewhiran - Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai (Thailand)
536 - 537


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.