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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
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2019-02-08 00:00:00 , DOI: 10.1039/c8nj06160b
Lebea N. Nthunya 1, 2, 3, 4, 5 , Sebastiaan Derese 6, 7, 8, 9, 10 , Leonardo Gutierrez 6, 7, 8, 9, 10 , Arne R. Verliefde 6, 7, 8, 9, 10 , Bhekie B. Mamba 1, 2, 3, 4, 5 , Tobias G. Barnard 5, 11, 12, 13 , Sabelo D. Mhlanga 1, 2, 3, 4, 5
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2019-02-08 00:00:00 , DOI: 10.1039/c8nj06160b
Lebea N. Nthunya 1, 2, 3, 4, 5 , Sebastiaan Derese 6, 7, 8, 9, 10 , Leonardo Gutierrez 6, 7, 8, 9, 10 , Arne R. Verliefde 6, 7, 8, 9, 10 , Bhekie B. Mamba 1, 2, 3, 4, 5 , Tobias G. Barnard 5, 11, 12, 13 , Sabelo D. Mhlanga 1, 2, 3, 4, 5
Affiliation
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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.
中文翻译:
使用一锅法和微波辅助法绿色合成银纳米粒子,然后将其嵌入PVDF纳米纤维膜上以抑制嗜温和嗜热细菌的生长
通过使用苹果提取物作为还原剂的环境友好的热辅助一锅法和微波辅助实验装置合成了抗菌银纳米颗粒(AgNPs)。这些AgNPs的形成通过UV-Vis,XRD和EDS确认,而它们的大小分布则通过TEM显微照片确定。对于热辅助一锅法和微波辅助还原法,AgNPs的直径均匀分布,分别为28.24±1.15 nm和22.05±1.05 nm。与热辅助一锅合成法相比,微波辅助还原法的还原速率更快。抗菌AgNPs嵌入聚偏二氟乙烯(PVDF)纳米纤维膜中,并且对革兰氏阳性菌具有抗菌活性。研究了嗜热脂肪地芽孢杆菌和金黄色葡萄球菌以及铜绿阴性的铜绿假单胞菌和肺炎克雷伯菌。抗菌纳米纤维成功地抑制了这些嗜温和嗜热细菌的生长。因此,嵌入AgNP的PVDF纳米纤维膜在水纯化系统中显示出很高的潜力,该系统会受到中温或嗜热细菌的污染而不会损害水的回收率。
更新日期:2019-02-08
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
使用一锅法和微波辅助法绿色合成银纳米粒子,然后将其嵌入PVDF纳米纤维膜上以抑制嗜温和嗜热细菌的生长
通过使用苹果提取物作为还原剂的环境友好的热辅助一锅法和微波辅助实验装置合成了抗菌银纳米颗粒(AgNPs)。这些AgNPs的形成通过UV-Vis,XRD和EDS确认,而它们的大小分布则通过TEM显微照片确定。对于热辅助一锅法和微波辅助还原法,AgNPs的直径均匀分布,分别为28.24±1.15 nm和22.05±1.05 nm。与热辅助一锅合成法相比,微波辅助还原法的还原速率更快。抗菌AgNPs嵌入聚偏二氟乙烯(PVDF)纳米纤维膜中,并且对革兰氏阳性菌具有抗菌活性。研究了嗜热脂肪地芽孢杆菌和金黄色葡萄球菌以及铜绿阴性的铜绿假单胞菌和肺炎克雷伯菌。抗菌纳米纤维成功地抑制了这些嗜温和嗜热细菌的生长。因此,嵌入AgNP的PVDF纳米纤维膜在水纯化系统中显示出很高的潜力,该系统会受到中温或嗜热细菌的污染而不会损害水的回收率。