Influence of Zn doping on the structural, optical and gas sensing properties of SnO2 nanoparticles has been examined in this work. Formation of tetragonal rutile structure of synthesized samples of undoped and Zn-doped SnO2 has been confirmed by X-ray diffraction (XRD) and Raman results. Decrease in particle size with increase in dopant concentration has been observed from transmission electron microscope and XRD analysis. Energy dispersive X-ray analysis confirmed presence of dopant in doped nanoparticles. It has been observed that doping also induced increase in specific surface area. Photoluminescence results indicated large number of oxygen vacancies in Zn-doped SnO2 nanoparticles. The sensor based on Zn-doped SnO2 displayed an enhanced sensing performance towards ethanol which is attributed to large surface area and huge number of oxygen vacancies. In addition, fabricated sensor showed good selectivity towards ethanol and exhibited reproducibility as well.
Journal of Materials Science: Materials in Electronics – Springer Journals
Published: May 17, 2017
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