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Issue 10, 2019
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Green synthesis of silver nanoparticles using one-pot and microwave-assisted methods and their subsequent embedment on PVDF nanofibre membranes for growth inhibition of mesophilic and thermophilic bacteria

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Abstract

Antibacterial silver nanoparticles (AgNPs) were synthesised via an environmentally benign thermally-assisted one-pot and microwave-assisted experimental set-up using apple extract as a reducing agent. The formation of these AgNPs was confirmed by UV-Vis, XRD and EDS while their size distribution was determined by TEM micrographs. The AgNPs were uniformly distributed with diameters of 28.24 ± 1.15 nm and 22.05 ± 1.05 nm for the thermally-assisted one-pot and microwave-assisted reduction methods respectively. The rate of reduction was faster in a microwave-assisted reduction method compared to that of a thermally-assisted one-pot synthesis method. The antibacterial AgNPs were embedded in polyvinylidene fluoride (PVDF) nanofibre membranes and their antibacterial activity against Gram-positive Geobacillus stearothermophilus and Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa and Klebsiella pneumoniae was studied. The antibacterial nanofibres successfully inhibited the growth of these mesophilic and thermophilic bacteria. Therefore, AgNP-embedded PVDF nanofibre membranes showed a high potential for use in water purification systems that are subject to contamination by mesophilic or thermophilic bacteria without compromising the rate of water recovery.

Graphical abstract: Green synthesis of silver nanoparticles using one-pot and microwave-assisted methods and their subsequent embedment on PVDF nanofibre membranes for growth inhibition of mesophilic and thermophilic bacteria

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Publication details

The article was received on 07 Dec 2018, accepted on 08 Feb 2019 and first published on 08 Feb 2019


Article type: Paper
DOI: 10.1039/C8NJ06160B
Citation: New J. Chem., 2019,43, 4168-4180

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    Green synthesis of silver nanoparticles using one-pot and microwave-assisted methods and their subsequent embedment on PVDF nanofibre membranes for growth inhibition of mesophilic and thermophilic bacteria

    L. N. Nthunya, S. Derese, L. Gutierrez, A. R. Verliefde, B. B. Mamba, T. G. Barnard and S. D. Mhlanga, New J. Chem., 2019, 43, 4168
    DOI: 10.1039/C8NJ06160B

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