Speaker
Abstract content <br> (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>
Simultaneous substitution of Ba, Mn and Co was successfully achieved by glycol thermal route. The phase formation was confirmed by X-ray powder diffraction technique. The microstrain is investigated based on the Williamson-Hall plot. Crystallinity, shape and size of the nanoparticles were investigated by high resolution transmission electron microscopy and high resolution scanning electron microscopy. Brunauer-Emmet-Teller measurements revealed that the sample has high surface area of 116 m²/g. The sample displays mesoporous character based on the Barrett-Joyner-Halenda test. The magnetic properties as a function of temperature were performed on mini-cryogen free VTI system in the temperature range 4 K to 300 K. The magnetization increased from 66.5 ± 0.3 emu/g to 84.4 ± 0.5 emu/g from 300 K to 4 K respectively. The sample was found to become magnetically harder at low temperature since the coercivity increases from 0.009 ± 0.003 T to 1.01 ± 0.004 T for the temperatures 300 K and 4 K respectively. The temperature dependence of the coercive field followed Kneller’s law, whilst a modified Bloch’s law was suitable in describing the magnetization as a function of measuring temperature. The electrochemical properties of Ba1/3Mn1/3Co1/3Fe2O4 nanoparticles were also investigated. Cyclic voltammograms of ferricyanide oxidation showed that the synthesized nanoparticles modified electrode exhibited improved electrochemical activity as compared to the bare electrode. These high-performance electrodes are expected to lead to the development of a novel group of electrochemical sensors.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
PhD
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
No
Main supervisor (name and email)<br>and his / her institution
Thomas Moyo (Moyo@ukzn.ac.za)/School of Chemistry and Physics, Westville campus, University of KwaZulu-Natal.
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
