Synthesis, characterization and gas sensing performance of SnO2 thin films prepared by spray pyrolysis

Bulletin of materials science

G H Jain²  V B Gaikwad¹  N K Pawar⁴  D D Kajale²  S D Shinde¹  Ganesh E Patil²  D N Chavan³  P T Ahire² 

[1] Materials Research Laboratory, K.T.H.M. College, Nashik 422 005, India$$Materials Research Laboratory, K.T.H.M. College, Nashik 422 005, IndiaMaterials Research Laboratory, K.T.H.M. College, Nashik 422 005, India$$;Materials Research Laboratory, Arts, Commerce and Science College, Nandgaon 423 106, India$$Materials Research Laboratory, Arts, Commerce and Science College, Nandgaon 423 106, IndiaMaterials Research Laboratory, Arts, Commerce and Science College, Nandgaon 423 106, India$$;Department of Chemistry, Arts, Commerce and Science College, Lasalgaon 422 306, India$$Department of Chemistry, Arts, Commerce and Science College, Lasalgaon 422 306, IndiaDepartment of Chemistry, Arts, Commerce and Science College, Lasalgaon 422 306, India$$;Department of Physics, Arts, Commerce and Science College, Satana 423 301, India$$Department of Physics, Arts, Commerce and Science College, Satana 423 301, IndiaDepartment of Physics, Arts, Commerce and Science College, Satana 423 301, India$$

关键词: SnO2 thin films;    spray pyrolysis;    H2S gas sensor;    sensitivity;    selectivity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this work, SnO₂ thin films were deposited onto alumina substrates at 350°C by spray pyrolysis technique. The films were studied after annealing in air at temperatures 550°C, 750°C and 950°C for 30 min. The films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical absorption spectroscopy technique. The grain size was observed to increase with the increase in annealing temperature. Absorbance spectra were taken to examine the optical properties and bandgap energy was observed to decrease with the increase in annealing temperature. These films were tested in various gases at different operating temperatures ranging from 50â€�??450°C. The film showed maximum sensitivity to H₂S gas. The H₂S sensing properties of the SnO₂ films were investigated with different annealing temperatures and H₂S gas concentrations. It was found that the annealing temperature significantly affects the sensitivity of the SnO₂ to the H₂S. The sensitivity was found to be maximum for the film annealed at temperature 950°C at an operating temperature of 100°C. The quick response and fast recovery are the main features of this film. The effect of annealing temperature on the optical, structural, morphological and gas sensing properties of the films were studied and discussed.

【 授权许可】

Unknown