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Preparation of Silver Nanoparticles in a Plasma-Liquid System in the Presence of PVA: Antimicrobial, Catalytic, and Sensing Properties
Journal of Chemistry ( IF 3 ) Pub Date : 2020-06-03 , DOI: 10.1155/2020/5380950
Margarita I. Skiba 1 , Victoria I. Vorobyova 2 , Iryna V. Kosogina 2
Affiliation  

The preparation of stabilized silver nanodispersions under the action of short-term plasma discharge using a polyvinyl alcohol stabilizer (polyvinyl alcohol (PVA)) was investigated. The influence of the basic technological parameters such as initial Ag+ concentration, PVA concentration, and process duration on the formation of nanoparticles and their characteristics (size and stability) were determined. The UV-Vis spectra showed the localized surface plasmon resonance at wavelengths of 400–420 nm. The SEM images showed that the shape of Ag NPs is spherical with an average particle size up to 30 nm. Ag NPs were used as a catalyst for the reduction of 4-nitrophenol (4-NP). The effect of the concentration of PNP and catalyst dosage on the value of apparent rate constant (kapp) for catalytic reduction of 4-NP in the presence of Ag NPs was investigated by means of UV-Vis spectrophotometry. The antimicrobial activity of Ag nanoparticles was investigated against yeast and Escherichia coli. The colorimetric sensor studies of plasma synthesized Ag NPs showed selective sensing of the potentially hazardous Hg2+ ion in water.

中文翻译:

在 PVA 存在的等离子体-液体系统中制备银纳米颗粒:抗菌、催化和传感特性

研究了使用聚乙烯醇稳定剂(聚乙烯醇(PVA))在短期等离子体放电作用下制备稳定的银纳米分散体。确定了初始 Ag+ 浓度、PVA 浓度和工艺持续时间等基本工艺参数对纳米颗粒形成及其特性(尺寸和稳定性)的影响。UV-Vis 光谱显示波长为 400-420 nm 的局部表面等离子体共振。SEM 图像显示,Ag NPs 的形状为球形,平均粒径高达 30 nm。Ag NPs 被用作还原 4-硝基苯酚 (4-NP) 的催化剂。通过紫外-可见分光光度法研究了 PNP 浓度和催化剂用量对在 Ag NPs 存在下催化还原 4-NP 的表观速率常数 (kapp) 值的影响。研究了银纳米颗粒对酵母和大肠杆菌的抗菌活性。对等离子体合成的 Ag NPs 的比色传感器研究表明,它可以选择性地检测水中潜在的危险 Hg2+ 离子。
更新日期:2020-06-03
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