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首页> 外文期刊>International Journal of Nanomedicine >Memecylon edule leaf extract mediated green synthesis of silver and gold nanoparticles
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Memecylon edule leaf extract mediated green synthesis of silver and gold nanoparticles

机译：Memecylon淡水叶提取物介导的银和金纳米颗粒的绿色合成

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Abstract: We used an aqueous leaf extract of Memecylon edule (Melastomataceae) to synthesize silver and gold nanoparticles. To our knowledge, this is the first report where M. edule leaf broth was found to be a suitable plant source for the green synthesis of silver and gold nanoparticles. On treatment of aqueous solutions of silver nitrate and chloroauric acid with M. edule leaf extract, stable silver and gold nanoparticles were rapidly formed. The gold nanoparticles were characterized by UV-visible spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDAX) and Fourier transform infra-red spectroscopy (FTIR). The kinetics of reduction of aqueous silver and gold ions during reaction with the M. edule leaf broth were easily analyzed by UV-visible spectroscopy. SEM analysis showed that aqueous gold ions, when exposed to M. edule leaf broth, were reduced and resulted in the biosynthesis of gold nanoparticles in the size range 20–50 nm. TEM analysis of gold nanoparticles showed formation of triangular, circular, and hexagonal shapes in the size range 10–45 nm. The resulting silver nanoparticles were predominantly square with uniform size range 50–90 nm. EDAX results confirmed the presence of triangular nanoparticles in the adsorption peak of 2.30 keV. Further FTIR analysis was also done to identify the functional groups in silver and gold nanoparticles. The characterized nanoparticles of M. edule have potential for various medical and industrial applications. Saponin presence in aqueous extract of M. edule is responsible for the mass production of silver and gold nanoparticles.
机译：摘要：我们使用Memecylon edule（Melastomataceae）的水叶提取物来合成银和金的纳米粒子。据我们所知，这是第一份报告，发现M. edule叶肉汤是绿色合成银和金纳米粒子的合适植物来源。用小菜叶提取物处理硝酸银和氯金酸的水溶液后，迅速形成了稳定的银和金纳米颗粒。通过紫外可见光谱，扫描电子显微镜（SEM），透射电子显微镜（TEM），能量色散X射线分析（EDAX）和傅里叶变换红外光谱（FTIR）对金纳米颗粒进行了表征。通过紫外可见光谱可以轻松地分析与淡水蓝藻叶片肉汤反应期间水银和金离子还原的动力学。扫描电镜分析表明，含水金离子在暴露于淡叶支原体叶肉汤时会被还原，从而导致生物合成大小为20–50 nm的金纳米颗粒。金纳米粒子的TEM分析表明，在10-45 nm的尺寸范围内形成了三角形，圆形和六边形形状。所得的银纳米粒子主要为正方形，大小范围为50-90 nm。 EDAX结果证实在2.30 keV的吸附峰中存在三角形纳米颗粒。还进行了进一步的FTIR分析，以鉴定银和金纳米颗粒中的官能团。蓝藻的特征纳米颗粒具有用于各种医学和工业应用的潜力。蓝景天的水提取物中皂苷的存在负责大量生产银和金纳米颗粒。

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