Speaker
Mrs
Motlalepula Rebecca Mhlongo
(Sefako Makgatho Health Sciences University)
Description
ZnAl2O4 powders were prepared by chemical bath deposition (CBD) method by varying ammonium hydroxide solution (AHS). The volume of the AHS was varied from 5 – 100 mL in order to determine the optimum volume that is needed for preparation of ZnAl2O4 powders. The effect of AHS volume on the structure, morphology, and optical properties of ZnAl2O4 powders was investigated. The X-ray diffraction (XRD) patterns showed that the powder samples correspond to the cubic crystalline ZnAl2O4 phase. The intensity of the most intense peaks increased with the increase in volume of AHS up to 50 mL. The scanning electron microscopy (SEM) results revealed that the AHS volume does not influence the surface morphology of the prepared powders. Transmission electron microscopy (TEM) confirmed that the prepared samples are in a nanoscale region and cubic. Elemental energy dispersive (EDS) analysis confirmed the presence of the expected elements. The ultraviolet - visible (UV – vis) spectra showed that by varying the volume of AHS influenced the band gap (Eg). The photoluminescence (PL) results revealed that 50 mL has the highest intensity.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
N/A
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Primary author
Mrs
Motlalepula Rebecca Mhlongo
(Sefako Makgatho Health Sciences University)
Co-authors
Prof.
Hendrik Swart
(University of the Free State)
Mr
Lehlohonolo Koao
(UFS (Qwa Qwa Campus))
Prof.
R. E. Kroon
(University of the Free State)
Prof.
Setumo Victor Motloung
(SMU)
