Exploration and study on the influence of Zinc substituted Barium Stannate (BaSnO3) nano powders for ammonia sensing applications

• Published in: Materials today : proceedings
• Main Authors: Habeeba, K., Manjulavalli, T.E., Ezhilarasi Gnanakumari, D.V., Kannan, A.G., Rajendrakumar, R.T, Muthumalai, K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2023
• Subjects: Barium Stannate; Interdigitated Electrodes; NH3 Sensor; Perovskites; Porous Material; Barium Stannate; NH3 Sensor; Perovskites; Interdigitated Electrodes; Porous Material
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2023.03.203

In the present work, we report the results of the gas sensing performance of ternary Barium Stannate (BaSnO3) semiconducting oxide material doped with zinc at the Barium site (Ba1-xZnxSnO3, where x  = 0.0; 0.2; 0.4; 0.6; 0.8 & 1.0). The samples are synthesized using a facile hydrothermal technique. The X-Ray Diffraction technique revealed that the synthesized samples are cubic structures with a preferential orientation along the (110) plane. In the exploration of the Field Emission Scanning Electron Microscope (FESEM), a structural deformation is observed for the doped samples and the material compositional information is witnessed through the EDAX spectrum for all the samples. The optical absorption spectra are carried out using UV-DRS and the calculated bandgap values are decreased for the Zn doped samples approximately to 0.7 eV compared to pristine BSO. Among various test gases, all the interdigitated electrode materials exhibited a fast response to NH3 except 2B1-xZnxSnO3. Amidst these electrode materials (BZSO (0–10 wt%)), the 8BZSO exhibited good sensitivity to NH3 at 5 ppm at room temperature. The similar response, recovery time (the 40 s), and good cyclic repeatability of the 8BZSO electrode material clarify that this would be the most favourable electrode material for NH3 gas sensing.