Speaker
Mr
Luyolo Ntozakhe
(University of Fort Hare)
Description
Abstract
Zinc oxide (ZnO) nanoparticles (NPs) were prepared by pneumatic spray pyrolysis technique (PSP) using zinc ethoxide as a precursor and tetrabutylammonium as a dopant. The morphological, structural and optical properties of PSP synthesized un-doped and C-ZnO NPs were evaluated using SEM, XRD, HRTEM, RS and UV-vis spectroscopy. SEM analysis has revealed that as synthesized NPs have spherical shape and the morphology of the NPs change as the concentration of carbon increases. XRD analysis has revealed peaks at 31.90°, 34.50°, 36.34°, 47.73°, 56.88°, 63.04°, 68.20°, and 77.33° belonging to the hexagonal Wurtzite ZnO crystal structure. HRTEM analysis has revealed the presence of spherical NPs with a NP size of (8.65 nm), (10.11 nm), (12.38 nm) and (13.79 nm) for the un-doped ZnO, 0.01 M C-ZnO 0.015 M C-ZnO, and 0.025 M C-ZnO NPs respectively. Moreover the Selected area diffraction images displaying the fact that only the diffraction planes of (101), (002) and (100) are responsible for the diffraction pattern. RS analysis has shown prominent peaks at 434 cm-1 which is the characteristic peak of E_2^2 (high) mode of the Wurtzite ZnO and the E_2^((2)) (high) has been red shifted by 4 cm-1, as compared to that found in the bulk ZnO. Raman phono shifts in C-ZnO NPs are discussed in detail. The obtained results can be used for identification of phonons in Raman spectra of C-ZnO NPs.
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Main supervisor (name and email)<br>and his / her institution
Prof Edson Meyer
EMeyer@ufh.ac.za
University of Fort Hare, Fort Hare Institute of Technology
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Primary author
Mr
Luyolo Ntozakhe
(University of Fort Hare)
Co-authors
Dr
Katwire David
(Chemistry department, University of Fort Hare, Private Bag X1314, Alice, 5700, Republic of South Africa.)
Prof.
Meyer Edson
(Fort Hare Institute of Technology (FHIT), University of Fort Hare, Private Bag X1314, Alice, 5700, Republic of South Africa.)
Dr
Taziwa Raymond
(Fort Hare Institute of Technology (FHIT), University of Fort Hare, Private Bag X1314, Alice, 5700, Republic of South Africa. Chemistry department, University of Fort Hare, Private Bag X1314, Alice, 5700, Republic of South Africa.)
