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首页> 外文期刊>Journal of Polymers and the Environment >Green Synthesis and Antioxidant Study of Silver Nanoparticles of Root Extract of Sageretia thea and Its Role in Oxidation Protection Technology
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Green Synthesis and Antioxidant Study of Silver Nanoparticles of Root Extract of Sageretia thea and Its Role in Oxidation Protection Technology

机译：丹参根提取物纳米银的绿色合成及其抗氧化研究及其在氧化保护技术中的作用。

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摘要

Development of environmentally friendly synthesis of nanoparticles is one of the important areas of research in nanotechnology. In present study silver naopartticles (AgNPs) of root extract of Sageretia thea ( S. thea ) were synthesized at room temperature. The synthesized AgNPs were characterized by UV. Visible spectroscopy (UV), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDX), transmission electron microscopy (TEM), dynamic light scattering (DLS) and Fourier transform infrared (FT-IR) spectroscopy. Formation of AgNPs was confirmed by visual examination the colour change from yellow to brick red due to surface Plasmon resonance band at 435 nm. SEM and TEM analysis of synthesized AgNPs revealed spherical morphology with average particle size 25 nm. Crystalline nature of the AgNPs in face centered cubic structure is evident from the selected area electron diffraction (SAED) and XRD pattern. The presence of elemental Ag was confirmed by EDX analysis at 3kv. Different functional groups which responsible for reduction and stabilization of reaction medium was confirmed by FTIR spectroscopy. The biosynthesized AgNPs showed strong DPPH and dye protection radical scavenging assay while modest hydrogen peroxide radical scavenging assay as compare to crude extract. The present investigations suggest that biosynthesized nanoparticles have a high potential for use in the preparation of drugs used against various diseases and also a promising candidate for many medical applications.
机译：纳米颗粒的环保合成的发展是纳米技术研究的重要领域之一。在本研究中，在室温下合成了鼠尾草（S. thea）根提取物的银颗粒（AgNPs）。合成的AgNP通过UV表征。可见光谱（UV），扫描电子显微镜（SEM），X射线衍射（XRD），能量色散光谱（EDX），透射电子显微镜（TEM），动态光散射（DLS）和傅立叶变换红外（FT-IR）光谱学。通过目视检查确认了AgNP的形成，由于在435nm的表面等离振子共振带，颜色从黄色变为砖红色。合成AgNPs的SEM和TEM分析显示球形形态，平均粒径为25 nm。从所选区域的电子衍射（SAED）和XRD图案可以明显看出，AgNPs的晶心中心立方结构具有晶体性质。通过3kv的EDX分析确认了元素Ag的存在。通过FTIR光谱确认负责反应介质的还原和稳定的不同官能团。与粗提取物相比，生物合成的AgNPs具有很强的DPPH和染料保护自由基清除能力，而过氧化氢自由基清除能力很强。目前的研究表明，生物合成的纳米颗粒具有很高的潜力，可用于制备抗多种疾病的药物，并且在许多医学应用中也是有希望的候选者。

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