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Influence of precursor concentration solution on CO sensing performance of sprayed nanocrystalline SnO2 thin films

R. H. BARI1,* , S. B. PATIL1, A. R. BARI2

Affiliation

  1. Nanomaterials Research Laboratory, Department of Physics, G. D. M. Arts, K. R. N. Commerce and M.D. Science College, Jamner 424 206, Maharashtra, India
  2. Department of Physics, Arts, Commerce and Science College, Bodwad 425 310, Maharashtra, India

Abstract

Nanocrystalline SnO2 thin films of different precursor concentration (0.025, 0.05 and 0.075 M) were deposited onto glass substrate at 250o C by simple spray pyrolysis (SP) technique. These samples were structurally and morphologically characterized using the XRD, FE-SEM techniques, respectively. The SnO2 films were found to be tetragonal in crystal structure and nanocrystalline in nature. As increase in thickness of films the texture coefficients for plane (110), (101) and (200) were increases. The average crystallite and grain size observed from XRD and FF-SEM was found to be less than 31 and 48 nm respectively. The films sprayed for 0.05M was observed to be most sensitive (S = 180.81) to CO for 100 ppm at 300oC. The sensor shows quick response (3 s) and fast recovery (8 s)..

Keywords

Spray pyrolysis, Nanocrystalline SnO2, CO gas sensing, Quick response, Fast recovery.

Citation

R. H. BARI, S. B. PATIL, A. R. BARI, Influence of precursor concentration solution on CO sensing performance of sprayed nanocrystalline SnO2 thin films, Optoelectronics and Advanced Materials - Rapid Communications, 6, 9-10, September-October 2012, pp.887-895 (2012).

Submitted at: April 24, 2012

Accepted at: Sept. 20, 2012