Open AccessProduction of Zinc and Copper as Nanoparticles by Green Synthesis Using Pseudomonas fluorescens
Author(s) -
Mohamed Hesham Fawzy,
Sara Mohamed Mahmoud,
Mohamed Ahmed Hanafy,
Mohamed Hassan Bakr,
A.E.M. Mahmoud,
Mohamed A. Ali,
Olfat S. Barakat
Publication year - 2021
Publication title -
pakistan journal of biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.268
H-Index - 43
eISSN - 1812-5735
pISSN - 1028-8880
DOI - 10.3923/pjbs.2021.445.453
Subject(s) - zinc , transmission electron microscopy , scanning electron microscope , nanoparticle , pseudomonas fluorescens , surface plasmon resonance , particle size , absorption spectroscopy , nuclear chemistry , absorption (acoustics) , materials science , spectroscopy , copper , chemistry , analytical chemistry (journal) , nanotechnology , bacteria , optics , organic chemistry , metallurgy , biology , composite material , physics , quantum mechanics , genetics
<b>Background and Objective:</b> Nanoparticles with a little size to an enormous surface (1-100 nm) have expected clinical, mechanical and agricultural applications. This study aimed to produce nano Zinc Oxide (ZnO) and nano Copper Oxide (CuO) particles by green synthesis. <b>Materials and Methods:</b> Two strains of <i>Pseudomonas fluorescens</i> i.e., PSI and PSII, both cell culture supernatants and cell pellets from the two strains were examined separately in CuSO<sub>4</sub> or ZnSO<sub>4</sub> solutions. The supernatants from both strains produced color changes in both solutions referring to the formation of nano CuO or ZnO particles. The solutions were examined for nano-particle characteristics using UV-spectroscopy, particle size and morphology were tested using a scanning electron microscope and transmission electron microscopy. <b>Results:</b> UV-Vis absorption spectrum of solutions at a wavelength range 200-800 nm exhibits a distinct absorption peak in the region of 238-331 and at 303-366 nm for CuO or ZnO NPs, respectively. Absorption bands and the characteristic Surface Plasmon Resonance (SPR) spectra confirm the existence of CuO and ZnO NPs. SEM analysis micrographs indicated that CuO NPs were formed as spherical particles, while the exact shape of ZnO NPs could be identified as oval aggregates. <b>Conclusion:</b> Changes of color occurred in both solutions of two strains referring to the formation of nano CuO or ZnO particles.