Effect of variation of precursor concentration on structural, microstructural, optical and gas sensing properties of nanocrystalline TiO2 thin films prepared by spray pyrolysis techniques

Bulletin of materials science

Idris G Pathan¹  Lalchand A Patil¹  Dhanashri G Patil¹  Dinesh N Suryawanshi¹ 

[1] Department of Physics, Pratap College, Amalner 425 401, India$$Department of Physics, Pratap College, Amalner 425 401, IndiaDepartment of Physics, Pratap College, Amalner 425 401, India$$

关键词: Spray pyrolysis;    nanocrystalline TiO2;    electron diffraction pattern.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The objective of the present paper is to investigate the effect of variation of precursor concentration (0.01, 0.02 and 0.03 M) on the structural, microstructural, optical and gas sensing properties of TiO₂ thin films. Titanium dioxide (TiO₂) films were prepared from aqueous solution of titanium chloride (TiCl₃.6H₂O, 99.9%pure, Merckmade, Germany) onto the glass substrates heated at a temperature of 350 °C by the spray pyrolysis technique. Bandgap energy of the films vary from 3.28 to 3.29 eV. X-ray diffraction shows that films to be nanocrystalline with anatase phase having tetragonal crystal structure. The ð‘�?? values calculated from electron diffraction patterns (TEM) were observed to be matching with ð‘�?? values calculated from XRD. Transmission electron microscopy (TEM) reveled that grain sizes were observed to increase (10â€�??29 nm) with an increase in the concentration of precursor solution. The gas sensing performance of the films was tested.

【 授权许可】

Unknown