Structural Characterization and Evaluation of Mycogenic Zinc Oxide Nanoparticles from the Cell-Free Culture Extract of Aspergillus niger
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Date
2024-04-26
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Faculty of Science, Obafemi Awolowo University
Abstract
Advances in the biological synthesis of nanoparticles have attracted decisive research attention in recent years.
This is due to their eco-friendliness, nontoxicity and large spectra of applications. In this work, the structural
characteristics and the purity of biogenic zinc oxide (ZnO) nanoparticles were assessed. Zinc oxide (ZnO)
nanoparticles were synthesized extracellularly using the culture filtrate of Aspergillus niger, in the presence of zinc
acetate dihydrate, as a precursor. The structural characteristics and purity of the nanoparticles were examined
using standard characterization methods viz UV-visible spectroscopy, transmission electron microscopy (TEM), scanning
electron microscopy (SEM), Fourier-transmission infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). Results revealed
a peak at 311nm and whitish and spherical particles with particulate sizes between 30 and 40 nm for the UV-
-1 visible spectroscopy and SEM respectively. On the FT-IR scale, absorption peaked at 548 cm in the spectra
region known for the functional groups of ZnO nanoparticles; while the average crystalline size was 21 nm
based on XRD analysis. Findings in this study revealed that the ecofriendly biogenic nanoparticles synthesized
by common fungi, such as Aspergillus niger, possess desirable qualities comparable to those from non-ecofriendly
and costly chemical processes, which are currently employed for an array of applications
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Citation
13. Ajijolakewu, A. K., Kazeem M. O., Dovia, G. M., Adebayo, I. A. and Ajide-Bamigboye, N. T (2024): Structural characterization and evaluation of mycogenic zinc oxide nanoparticles from the cell-free culture-extract of Aspergillus niger. IFE Journal of Science. 24 (1); 1-11.