Structural, Optical and Impedance Studies of Hydrothermally and Solvothermally Prepared SnO2 Nanocrystallites for Conducting Electrode Application

K. Ashok Kumar, D. Ramesh, M. Gunaseelan, K. Subalakshmi, J. Senthilselvan

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Nanocrystalline SnO2 powders were synthesized by hydrolysis and solvolysis of SnCl2 followed by a fast nucleation process in Teflon lined autoclave. The as prepared samples were calcined at 400 °C for 4 h to attain stable phase. The X-ray diffraction pattern confirms tetragonal crystal structure for both hydrothermally and solvothermally prepared nanoparticles and the average crystallite size is calculated to be 14 and 30 nm respectively. Williamson–Hall plot (W–H plot) reveals low value of strain induced broadening using uniform deformation model. Absorption co-efficient of prepared SnO2 was determined using UV–Visible absorption spectrum. Nyquist plane plot shows the decreased electrical resistance of SnO2 with increasing the applied potential resulting in increased conductivity. The increasing conducting behavior of tin oxide nanoparticles can be used as conducting layer in photoelectrodes.

Original languageEnglish
Pages (from-to)221-225
Number of pages5
JournalTransactions of the Indian Institute of Metals
Volume68
DOIs
StatePublished - 28 Sep 2015

Keywords

  • DSSC
  • Hydrothermal
  • Impedance spectroscopy
  • SnO nanoparticles
  • Solvothermal

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