Influence of calcination temperature on microstructural features and ethanol sensing behaviours of mesoporous SnO2 powder synthesized by soft-template method

Nor Irwin, Basir and Muhammad Yusri, Ahmad and Jusliha, Johari and Ahmad Zuhairi, Abdullah and Mohamad Zailani, Abu Bakar (2023) Influence of calcination temperature on microstructural features and ethanol sensing behaviours of mesoporous SnO2 powder synthesized by soft-template method. AIP Conference Proceedings, 2785 (1). p. 1. ISSN 1551-7616

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Abstract

Mesoporous SnO2 powders have been synthesized through soft-template method by incorporating cetyltrimethylammonium bromide (CTAB), as structure directing agent. The as-synthesized sample were calcined at 400, 500, and 600°C and they are being characterized by Thermogravimetric Analysis (TGA), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and N2 adsorption-desorption experiment. Sample synthesized at 400°C has smaller crystallite and particle size, less agglomerated and high surface area compared to the sample prepared at 500, and 600°C. Thick-film gas sensors were fabricated using synthesized SnO2 powder via screen-printing technique, and the sensing response of the sensors to 1000 ppm ethanol gas were investigated at different operating temperatures. Sensor using sample calcined at 400°C gives the highest sensitivity, S= 26.4 at 300°C operating temperature.

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