Tin oxide (SnO2) nanoparticles are prepared by simple and cost-effective biosynthesis method,
wherein, tin chloride (SnCl4) reacts with Bengal gram bean (Cicer arietinum L.) extract. The assynthesized
SnO2 nanoparticles were coated onto the glass substrates using doctor blade method to form
thin films. The films were further annealed at 250°C and used for characterization and gas sensing applications.
Alternatively, the SnO2 nanoparticles were biosynthesized using carbohydrate (starch) and also by chemical precipitation
method. A comparative study of structural and morphological properties of chemical and biosynthesized SnO2
nanoparticles is also carried out. Further, room temperature ammonia gas sensing properties of the biosynthesized SnO2
nanoparticles thin films are studied.
Keywords: Biosynthesis, electron microscopy, nanostructures, oxides, sensors.
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