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首页> 外文期刊>Karbala International Journal of Modern Science >Plant-mediated biosynthesis and characterization of silver nanoparticles by leaf extracts of Tragia involucrata, Cymbopogon citronella, Solanum verbascifolium and Tylophora ovata
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Plant-mediated biosynthesis and characterization of silver nanoparticles by leaf extracts of Tragia involucrata, Cymbopogon citronella, Solanum verbascifolium and Tylophora ovata

机译： T草， C香柏，茄子茄子叶提取物的植物介导的银纳米颗粒的生物合成和表征ce：italic>和卵圆线虫

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Evolution of an ecological and biogenic experimental process for synthesis of nanoparticles is evolving into a significant offshoot of nanotechnology. As an important metal, silver nanoparticles (AgNPs) have a number of applications in medical domain. Since these silver nanoparticles have been used for infection prevention in the medical study, it may be more relevant to reduce their size by using ancient Indian herbal plants. A green rapid biogenic synthesis of silver nanoparticles using Tragia involucrata, Cymbopogon citronella, Solanum verbascifolium and Tylophora ovata aqueous extracts was demonstrated in this present study. The pathway of nanoparticles formation is by means of reduction of AgNO 3 by leaf extracts, which acts as both reducing and capping agents. The formation of the silver nanoparticles was observed within 15?min. The properties of prepared nanoparticles were characterized by visual examination (color change), UV absorption, Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM) and X-ray Diffraction (XRD). An intense surface plasmon resonance band at ～454?nm, ～452?nm, ～458?nm and ～447?nm in the UV–visible spectrum clearly reveals the formation of silver nanoparticles. FTIR spectrum confirms the existence of various functional groups of biomolecules capping the nanoparticles. XRD studies reveal a high degree of crystallinity and monophasic Ag nanoparticles of face-centered cubic structure. The morphology of the particles formed consists of varied shapes such as rod, flower-like, spherical and hexagonal pattern. The biosynthesis of nanoparticles has received increasing attention due to the growing demand to produce secure, cost-effective and environmentally friendly technologies for nanomaterials synthesis. Graphical abstract Display Omitted Highlights ? To reduce the agglomeration, we trailed the special ultra-sonication technique. ? Powder diffraction analysis (XRD) confirmed the crystalline nature of silver nanoparticles. ? The feasible mechanism of action of AgNPs was analysed by using FTIR patterns. ? FTIR pattern revealed the presence of Silver bonding and the functional groups responsible for reduction of Ag nanoparticles. ? Structural morphology of Silver nanoparticles was studied by FESEM analysis. ? Biomolecules of the leaf extract play dual role as both reducing and capping agents.
机译：用于合成纳米粒子的生态和生物实验方法的演变正在演变为纳米技术的重要分支。作为一种重要的金属，银纳米粒子（AgNPs）在医学领域有许多应用。由于这些银纳米颗粒已在医学研究中用于预防感染，因此通过使用古老的印度草药植物来减小其尺寸可能更有意义。在本研究中，证明了使用Tragia involucrata，Cymbopogon citronella，Solanum verbascifolium和Tylophora ovata水提取物的绿色快速生物合成银纳米颗粒。纳米颗粒形成的途径是通过叶提取物还原AgNO 3，叶提取物既充当还原剂，又充当封盖剂。在15分钟内观察到了银纳米颗粒的形成。通过目测（颜色变化），紫外线吸收，傅立叶变换红外光谱（FTIR），场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）来表征所制备的纳米颗粒的性质。在紫外可见光谱中，在〜454？nm，〜452？nm，〜458？nm和〜447？nm处的强烈的表面等离子体共振带清楚地表明了银纳米颗粒的形成。 FTIR光谱证实了覆盖纳米颗粒的生物分子的各种官能团的存在。 XRD研究显示出高度结晶性和面心立方结构的单相Ag纳米颗粒。形成的颗粒的形态由各种形状组成，例如杆状，花状，球形和六边形。纳米颗粒的生物合成受到越来越多的关注，这是因为对生产安全，经济高效且环保的纳米材料合成技术的需求不断增长。图形摘要显示省略的突出显示？为了减少结块，我们采用了特殊的超声处理技术。 ？粉末衍射分析（XRD）证实了银纳米颗粒的晶体性质。 ？利用FTIR图谱分析了AgNPs作用的可行机制。 ？ FTIR图谱显示存在银键和负责还原Ag纳米粒子的官能团。 ？通过FESEM分析研究了银纳米颗粒的结构形态。 ？叶提取物的生物分子同时充当还原剂和加帽剂。

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