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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

Lebea Nthunya (UGent) , Sebastiaan Derese (UGent) , Leonardo Gutierrez (UGent) , Arne Verliefde (UGent) , Bhekie B Mamba, Tobias G Barnard and Sabelo D Mhlanga
(2019) NEW JOURNAL OF CHEMISTRY. 43(10). p.4168-4180
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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.
Keywords
GOLD NANOPARTICLES, ACETATE NANOFIBERS, PES MEMBRANE, APPLE JUICE, DISTILLATION, CHITOSAN, MECHANISMS, NUCLEATION, PREVENTION, REDUCTION

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Chicago
Nthunya, Lebea, Sebastiaan Derese, Leonardo Gutierrez, Arne Verliefde, Bhekie B Mamba, Tobias G Barnard, and Sabelo D Mhlanga. 2019. “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.” New Journal of Chemistry 43 (10): 4168–4180.
APA
Nthunya, L., Derese, S., Gutierrez, L., Verliefde, A., Mamba, B. B., Barnard, T. G., & Mhlanga, S. D. (2019). 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. NEW JOURNAL OF CHEMISTRY, 43(10), 4168–4180.
Vancouver
1.
Nthunya L, Derese S, Gutierrez L, Verliefde A, Mamba BB, Barnard TG, et al. 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. NEW JOURNAL OF CHEMISTRY. 2019;43(10):4168–80.
MLA
Nthunya, Lebea et al. “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.” NEW JOURNAL OF CHEMISTRY 43.10 (2019): 4168–4180. Print.
@article{8617578,
  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.},
  author       = {Nthunya, Lebea and Derese, Sebastiaan and Gutierrez, Leonardo and Verliefde, Arne and Mamba, Bhekie B and Barnard, Tobias G and Mhlanga, Sabelo D},
  issn         = {1144-0546},
  journal      = {NEW JOURNAL OF CHEMISTRY},
  keywords     = {GOLD NANOPARTICLES,ACETATE NANOFIBERS,PES MEMBRANE,APPLE JUICE,DISTILLATION,CHITOSAN,MECHANISMS,NUCLEATION,PREVENTION,REDUCTION},
  language     = {eng},
  number       = {10},
  pages        = {4168--4180},
  title        = {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},
  url          = {http://dx.doi.org/10.1039/c8nj06160b},
  volume       = {43},
  year         = {2019},
}
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