Effects of Sol Concentration on the Structural and Optical Properties of SnO۲ Nanoparticle

In this paper, the effects of changes in Sol concentration on the structural and optical properties of SnO۲ Nanoparticles are studied through the Sol-Gel method. SnO۲ Nanoparticles are produced from different SnO۲ solution concentrations (۰.۱, ۰.۳ and ۰.۵ mol/L) at room temperature.  X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analysis are used to investigate the effects of changes in Sol concentration on the crystalline and surface morphology of Nanoparticles. The XRD pattern shows that the particles are in the standard tetragonal phase of SnO۲. The crystallites sizes are ۱۱.۷nm, ۱۸.۸nm, and ۷۴.۸nm, for ۰.۱ M, ۰.۳M and ۰.۵ M of concentration respectively. The average size of SnO۲ particles decreases by a reduction in the Sol concentration. The band gap value is ۴.۰۷eV, ۴.۲۸eV and ۴.۳۶eV for ۰.۵M, ۰.۳M and ۰.۱M of concentration respectively. The UV-Visible analysis shows that decreasing the Sol concentration will cause the absorption edge shift to the shorter wavelengths, coz decreasing the Sol concentration will reduce the Nanoparticles size, and smaller Nanoparticles size absorb shorter wavelengths better and also increase the band gap.

کلیدواژه ها:

SnO۲ ، Nanoparticle ، Sol-gel ، XRD ، FT-IR analysis