from 28 June 2015 to 3 July 2015 (Africa/Johannesburg)
SAIP2015 Proceeding published on 17 July 2016
Synthesis, structural and optical characterisation of cobalt (Co) and indium (In) co-doped ZnO nanoparticles
Presented by Mr. Mpho MASWANGANYE on 30 Jun 2015 from 11:30 to 11:50
Type: Oral Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials
Co and In co-doped nanopowders of ZnO as well as In and Co singly doped ZnO were successfully prepared using sol-gel method. The synthesized samples were characterised using x-ray diffraction (XRD), UV-vis spectroscopy, Raman spectroscopy (RS), Transmission Electron Microscopy and EDS. The effects of Co and In co-doping on the structural and optical properties were investigated. XRD results showed no peaks associated with In3+ or Co2+ ions indicating that In3+ and Co2+ ions substituted for Zn2+ ions in the ZnO wurtzite structure. This was corroborated by the EDS results. Doping ZnO nanoparticles with In and Co significantly reduced the grain sizes whereas the lattice parameters were not significantly affected. TEM results confirmed that the nanoparticles were spherically shaped. Raman spectroscopy also confirmed that the ZnO nanoparticles were of a wurtzite hexagonal structure. Single doping reduced the energy band gaps and co-doping reduced them even further.
KE Rammutla, Erasmus.Rammutla@ul.ac.za, University of Limpopo