28 June 2015 to 3 July 2015
Africa/Johannesburg timezone
SAIP2015 Proceeding published on 17 July 2016

Synthesis, structural and optical characterisation of cobalt (Co) and indium (In) co-doped ZnO nanoparticles

30 Jun 2015, 11:30
20m
Oral Presentation Track A - Division for Physics of Condensed Matter and Materials DPCMM

Speaker

Mr Mpho Maswanganye (Universtity of Limpopo)

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

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.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Main supervisor (name and email)<br>and his / her institution

KE Rammutla,
Erasmus.Rammutla@ul.ac.za,
University of Limpopo

Primary author

Mr Mpho Maswanganye (Universtity of Limpopo)

Co-authors

Dr Bonex Mwakikunga (DST/CSIR National Centre for Nano - Structured Materials) Prof. Erasmus Rammutla (University of LImpopo) Dr Sone Bertrand (Materials Research Department, iThemba labs) Dr Thuto Mosuang (University of Limpopo) Prof. malik Maaza (Materials Research Department, iThemba labs)

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