Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 9, Issue 6, Pages 15513-15524Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2020.11.026
Keywords
Eucalyptus camaldulensis; Gum polymer; Green fabrication; Nanoparticles; Antimicrobial activity; Mutagenicity; Catalytic activity
Funding
- Higher Education Commission under the Start-up Research Grant Program (SRGP) [1150]
- National Research Program for Universities (NRPU) [6498]
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Green biosynthesis of nanoparticles (NPs) has gained much significance due to costeffectiveness, time-efficiency, biocompatibility, and environmentally friendliness. Herein, we report the fabrication of zinc (ZnNPs) and silver nanoparticles (AgNPs) using Eucalyptus camaldulensis (EC) gum extract as a low-cost and green bio-matrix. The as-fabricated ECZnNPs and EC-AgNPs were comprehensively characterized by UV-visible spectroscopy, Fourier Transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-Ray Diffraction (XRD), and scanning electron microscopy (SEM) techniques. Specific characteristic peaks of synthesized NPs were scrutinized through UV-visible and FTIR. The synthesized NPs revealed irregular shape and size with an increase in roughness of the surface. A delay in the rate of weight loss indicated the stable nature of EC-ZnNPs at high temperatures. Similarly, an increase in the crystallinity nature of EC-ZnNPs and EC-AgNPs was evidenced through XRD analysis. As compared to gum samples, the green fabricated EC-ZnNPs and EC-AgNPs performed an admirable inhibitory activity against a pathogenic bacterium (Escherichia coli) and fungal strain (Schizophyllum commune). Mutagenicity and cytotoxicity activities determined through Ames and haemolytic tests affirmed the nonmutagenic and non-toxic attributes of the gum samples and their derived EC-ZnNPs and EC-AgNPs. Finally, the EC-AgNPs and EC-ZnNPs showed a high photocatalytic potentiality towards the degradation of methylene blue dye under sunlight irradiation. In conclusion, the findings manifest excellent antimicrobial and dye degradation potentialities of gum based EC-ZnNPs and EC-AgNPs, representing its putative perspective as a novel nano antibiotic against pathogenic bacterial and fungal isolates, and for environmental mitigation. The present method is eco-friendly, clean and did not require any toxic/hazardous reductants. (C) 2020 The Authors. Published by Elsevier B.V.
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