期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 82, 期 2, 页码 497-504出版社
ELSEVIER
DOI: 10.1016/j.colsurfb.2010.10.007
关键词
Au and Ag nanoparticles; Bimetallic Au/Ag alloy nanoparticles; Mahogany leaf; Swietenia mahogany JACQ.; Biogenic synthesis
资金
- University Grants Commission, India [33-290/2007]
- CSIR
- UGC
In this paper, we have demonstrated for the first time, the superb efficiency of aqueous extract of dried leaves of mahogany (Swietenia mahogani JACQ.) in the rapid synthesis of stable monometallic Au and Ag nanoparticles and also Au/Ag bimetallic alloy nanoparticles having spectacular morphologies. Our method was clean, nontoxic and environment friendly. When exposed to aqueous mahogany leaf extract, competitive reduction of Au-III and Ag-I ions present simultaneously in same solution leads to the production of bimetallic Au/Ag alloy nanoparticles. UV-visible spectroscopy was used to monitor the kinetics of nanoparticles formation. UV-visible spectroscopic data and TEM images revealed the formation of bimetallic Au/Ag alloy nanoparticles. Mahogany leaf extract contains various polyhydroxy limonoids which are responsible for the reduction of Au-III and Ag-I ions leading to the formation and stabilization of Au and Ag nanopaticles. (C) 2010 Elsevier B.V. All rights reserved.
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