Green synthesis and characterization of monodispersed silver nanoparticles using root bark aqueous extract of Annona muricata Linn and their antimicrobial activity

被引:22
|
作者
Ezealisiji, K. M. [1 ]
Noundou, X. S. [2 ]
Ukwueze, S. E. [1 ]
机构
[1] Univ Port Harcourt, Fac Pharmaceut Sci, Dept Pharmaceut Chem, Port Harcourt, Nigeria
[2] Rhodes Univ, Dept Chem, Grahamstown, South Africa
关键词
Characterization; Antimicrobial; Silver nanoparticle; Photon correlation microscopy;
D O I
10.1007/s13204-017-0632-5
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In recent time, various phytosynthetic methods have been employed for the fabrication of silver nanoparticles; these unique metal nanoparticles are used in several applications which include pharmaceuticals and material engineering. The current research reports a rapid and simple synthetic partway for silver nanoparticles (AgNPs) using root bark aqueous extract of Annona muricata and the evaluation of its antimicrobial efficacy against pathogenic microorganisms. The root bark extract was treated with aqueous silver nitrate solution. Silver ions were reduced to silver atoms which on aggregation gave Silver nanoparticles; the biosynthesized AgNPs were characteristically spherical, discreet and stabilized by phytochemical entities and were characterized using ultraviolet visible spectroscopy, transmission electron microscope (TEM) and photon correlation microscopy. The aqueous plant extractAgNPs suspension was subjected to Fourier transform infrared spectroscopy. TEM result for the average particle size is 22 +/- 2 nm. The polydispersity index and zeta-potential were found to be 0.44 +/- 0.02 and -27.90 +/- 0.01 mV, respectively (Zeta-Sizer). The antimicrobial evaluation result showed that the synthesized silver nanoparticles at different concentration were very active against the Gram-positive bacteria (B. subtilis, S. aureous) and Gram-negative bacteria (K. Pneumonia, E. Coli and Pseudomonas aeruginosa), P. aeruginosa being most susceptible to the anti microbial effect of the silver nanoparticles. Stable silver nanoparticles with antimicrobial activity were obtained through biosynthesis.
引用
收藏
页码:905 / 911
页数:7
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