Green synthesis of silver nanoparticles using Terminalia chebula extract at room temperature and their antimicrobial studies

被引:96
|
作者
Kumar, Kesarla Mohan [1 ]
Sinha, Madhulika [1 ]
Mandal, Badal Kumar [1 ]
Ghosh, Asit Ranjan [2 ]
Kumar, Koppala Siva [3 ]
Reddy, Pamanji Sreedhara [3 ]
机构
[1] VIT Univ, Trace Elements Speciat Res Lab, Environm & Analyt Chem Div, Sch Adv Sci, Vellore 632014, Tamil Nadu, India
[2] VIT Univ, Med Biotechnol Div, Sch Bio Sci & Technol, Vellore 632014, Tamil Nadu, India
[3] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India
关键词
Silver nanoparticles; Terminalia chebula; Di/tri-galloyl glucose; Gallic acid; Glucose; LEAF EXTRACT; BIOSYNTHESIS; AG; GENERATION; DEPOSITION; GOLD; AU;
D O I
10.1016/j.saa.2012.02.001
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
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.
引用
收藏
页码:228 / 233
页数:6
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