Study the Structural and Optical Properties of Cr doped SnO2 Nanoparticles Synthesized by Sol-Gel Method
Year: 2019
Type: conference-paper
Abstract: Chromium doped tin oxide Sn 1-x Cr x O 2 (where x=0, 0.05, 0.10 and 0.15) nanoparticles were prepared by sol-gel technique. The nanoparticles were prepared by adding only distilled water to the raw materials which was SnCl 4 .5H 2 O as a precursor and Cr (NO 3 ) 3 .9H 2 O for doping. XRD patterns show that the obtained nanopowders is SnO 2 with tetragonal phase fully compatible with (JCPDS) card no. 41-1445.The crystallite size was calculated by Scherrer and Williamson-Hall formula and was found to be 14.8-19.6nm and 13-18.4 nm respectively. The prepared nanopowders were examined by SEM, which revealed that they have a spherical or semi-spherical shape with some agglomeration and EDX confirm presence of Sn, Cr and O 2 elements. FTIR examination revealed that the changing in the shapes and positions of absorption peaks indicates to presence of stretching modes, which are give an indication of successful doping Cr to tin dioxide nanoparticles. The wavelength range (350-1100) nm was used to study the optical properties. The measurement showed that the nature of the optical transitions represented direct allowed with energy gap varies in the range of (3.6-2.3) eV with change of Cr ratios parameter. The UV absorption, transmittance, reflection spectrum and optical constant computed of the prepared samples.
Source: Energy Procedia
Institution: University of Baghdad
Language: English
Topic: ZnO doping and properties
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2913386154