Green synthesis of silver nanoparticles using Terminalia chebula extract at room temperature and their antimicrobial studies
Green synthesis of silver nanoparticles using Terminalia chebula extract at room temperature and their antimicrobial studies
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DOI：
10.1016/j.saa.2012.02.001
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发表时间：
2012-06-01
影响因子：
4.4
通讯作者：
Reddy, Pamanji Sreedhara
中科院分区：
文献类型：
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作者：
Kumar, Kesarla Mohan;Sinha, Madhulika;Reddy, Pamanji Sreedhara
以诃子（Terminalia chebula，T.）为原料，采用绿色快速生物合成方法制备了银纳米粒子（Ag NPs）。诃子）水提取物的活性。使用紫外-可见分光光度计通过452 nm处的表面等离子体共振（SPR）确认银纳米颗粒的形成。T.还原银离子为银纳米粒子。诃子提取物在20分钟内完成，这通过电位测定法证明。合成的纳米粒子，其特征在于使用紫外可见光谱，傅立叶变换红外光谱（FT-IR），粉末X射线衍射（XRD），透射电子显微镜（TEM）和原子力显微镜（AFM）。提取物中存在的可水解单宁如二/三没食子酰-葡萄糖被水解成没食子酸和葡萄糖，其充当还原剂，而氧化的多酚充当稳定剂。此外，它对革兰氏阳性菌（S。金黄色葡萄球菌ATCC 25923）和革兰氏阴性菌（E. coli ATCC 25922）。在工业上，它可能是制备银纳米颗粒的明智选择。(C)2012爱思唯尔有限公司版权所有。
A green rapid biogenic synthesis of silver nanoparticles (Ag NPs) using Terminalia chebula (T. chebula) aqueous extract was demonstrated in this present study. The formation of silver nanoparticles was confirmed by Surface Plasmon Resonance (SPR) at 452 nm using UV-visible spectrophotometer. The reduction of silver ions to silver nanoparticles by T. chebula extract was completed within 20 min which was evidenced potentiometrically. Synthesised nanoparticles were characterised using UV-vis spectroscopy, Fourier transformed infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and atomic force microscopy (AFM). The hydrolysable tannins such as di/tri-galloyl-glucose present in the extract were hydrolyzed to gallic acid and glucose that served as reductant while oxidised polyphenols acted as stabilizers. In addition, it showed good antimicrobial activity towards both Gram-positive bacteria (S. aureus ATCC 25923) and Gram-negative bacteria (E. coli ATCC 25922). Industrially it may be a smart option for the preparation of silver nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.