4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
The Proceedings of SAIP2016 published on 24 December 2017
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Effect of annealing temperature on LiMn2O4 nanostructures prepared by chemical bath method

Presented by Mr. Lehlohonolo KOAO on 5 Jul 2016 from 16:10 to 18:00
Type: Poster Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials
Board #: A.056

Abstract

LiMn2O4 powders were prepared by chemical bath method using ammonia solution as a catalyst. The effect of annealing temperature on the thermal analysis, structure, morphology and optical properties of LiMn2O4 nanostructures were investigated. The annealing temperatures were varied from 25 up to 1000°C. The thermogravimetric analyses (TGA) and differential scanning calorimeter (DSC) showed that the final yield decreases with an increase in the annealing temperature. The X-ray diffraction (XRD) patterns of the LiMn2O4 nanostructures correspond to the various planes of a spinel LiMn2O4 phase. It was observed that the secondary phases decreases with an increase in annealing temperature. The diffraction peaks increase in intensity with an increase in annealing temperature. The estimated average grain sizes calculated using the XRD spectra were found to be in the order of 50 ± 1 nm. It was observed that the estimated average grain sizes increases with an increase in annealing temperature. The surface morphology study revealed the irregular nanoparticle. The irregular nanoparticle increased in size with an increase in annealing temperature. The UV-Vis spectra showed a red shift with an increase in annealing temperature. The band gap energy of ZnO was also found to decrease.

Award

no

Level

N/A

Supervisor

Koao L.F. and koaolf@ufs.ac.za and UFS (Qwa Qwa)

Paper

yes

Permission

yes

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room:


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