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Green microwave-assisted combustion synthesis of Zinc oxide nanoparticles with Citrullus colocynthis (L.) Schrad: characterization and biomedical applications


Citation

Azizi, Susan and Mohamad, Rosfarizan and Shahri, Mahnaz Mahdavi (2017) Green microwave-assisted combustion synthesis of Zinc oxide nanoparticles with Citrullus colocynthis (L.) Schrad: characterization and biomedical applications. Molecules, 22 (2). pp. 1-13. ISSN 1420-3049

Abstract / Synopsis

In this paper, a green microwave-assisted combustion approach to synthesize ZnO-NPs using zinc nitrate and Citrullus colocynthis (L.) Schrad (fruit, seed and pulp) extracts as bio-fuels is reported. The structure, optical, and colloidal properties of the synthesized ZnO-NP samples were studied. Results illustrate that the morphology and particle size of the ZnO samples are different and depend on the bio-fuel. The XRD results revealed that hexagonal wurtzite ZnO-NPs with mean particle size of 27–85 nm were produced by different bio-fuels. The optical band gap was increased from 3.25 to 3.40 eV with the decreasing of particle size. FTIR results showed some differences in the surface structures of the as-synthesized ZnO-NP samples. This led to differences in the zeta potential, hydrodynamic size, and more significantly, antioxidant activity through scavenging of 1, 1-Diphenyl-2-picrylhydrazyl (DPPH) free radicals. In in vitro cytotoxicity studies on 3T3 cells, a dose dependent toxicity with non-toxic effect of concentration below 0.26 mg/mL was shown for ZnO-NP samples. Furthermore, the as-synthesized ZnO-NPs inhibited the growth of medically significant pathogenic gram-positive (Bacillus subtilis and Methicillin-resistant Staphylococcus aurous) and gram-negative (Peseudomonas aeruginosa and Escherichia coli) bacteria. This study provides a simple, green and efficient approach to produce ZnO nanoparticles for various applications.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Biotechnology and Biomolecular Sciences
Institute of Tropical Forestry and Forest Products
DOI Number: https://doi.org/10.3390/molecules22020301
Publisher: MDPI
Keywords: ZnO nanoparticles; Combustion method; Green synthesis; Citrullus colocynthis; Antimicrobial; Antioxidant
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 12 Mar 2019 10:26
Last Modified: 12 Mar 2019 10:26
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/molecules22020301
URI: http://psasir.upm.edu.my/id/eprint/61978
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