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Synthesis and characterization of silver-nanoparticle-impregnated fiberglass and utility in water disinfection

机译：纳米银浸渍玻璃纤维的合成，表征及在水消毒中的应用

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A number of researchers have deployed silver (Ag) nanoparticles through a number of techniques on various substrates including carbon, zeolites and polymers for water disinfection applications. However, Ag impregnated on an inorganic fiberglass surface through a simple electroless process was only recently reported for the first time. Fiberglass impregnated with Ag nanoparticles displays superior performance over carbon-based silver support systems but little is known about the factors that affect the architecture of the system, its interfacial properties and its consequent bactericidal activity. In this study, Ag content and particle size on a fiberglass substrate were manipulated by adjusting the AgNO3 concentration, immersion time, temperature, solution pH and reduction temperature. The reduction chemistry of the Ag-nanoparticle-impregnated fiberglass is described and supported with thermal gravimetric analysis (TGA) and photoelectron spectroscopy (XPS) measurements. The Ag content along with the particle size and particle size distribution were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD). The Ag content on the fiberglass mats ranged from 0.04 to 4.7 wt% Ag/g-fiber with a size distribution of 10-900 nm under standard processing conditions. Inductively coupled plasma mass spectrometry (ICP-MS) was used to analyze the Ag desorption from the fiberglass substrate, while the bactericidal properties were evaluated against Escherichia coli (E. coli).
机译：许多研究人员已通过多种技术将银（Ag）纳米颗粒部署到各种基材上，包括水消毒应用的碳，沸石和聚合物。然而，仅通过最近的首次报道，通过简单的化学方法将Ag浸渍在无机玻璃纤维表面上。浸渍有银纳米颗粒的玻璃纤维表现出优于碳基银载体系统的性能，但对影响系统结构，界面性质以及随之而来的杀菌活性的因素知之甚少。在这项研究中，通过调节AgNO3的浓度，浸入时间，温度，溶液的pH值和还原温度来控制玻璃纤维基底上的Ag含量和粒径。描述了含银纳米粒子的玻璃纤维的还原化学，并通过热重分析（TGA）和光电子能谱（XPS）测量来支持。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），能量色散X射线光谱法（EDS）和X射线衍射（XRD）表征了Ag含量以及粒度和粒度分布。在标准加工条件下，玻璃纤维垫上的Ag含量范围为0.04至4.7 wt％Ag / g纤维，尺寸分布为10-900 nm。电感耦合等离子体质谱法（ICP-MS）用于分析Ag从玻璃纤维基质中的解吸，同时评估了其对大肠杆菌（E. coli）的杀菌性能。

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