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Catalytic and antibacterial activity of Ag decorated magnetic core shell nanosphere

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Title Catalytic and antibacterial activity of Ag decorated magnetic core shell nanosphere
 
Creator SINGH, S
BAHADUR, D
 
Subject TOXIC METAL-IONS
SILVER NANOPARTICLES
BACTERIAL PATHOGENS
ESCHERICHIA-COLI
FACILE SYNTHESIS
P-NITROPHENOL
RHODAMINE-B
REDUCTION
ZNO
REMOVAL
Nanosphere
Magnetic
Antibacterial
Dye
Catalysis
 
Description We report a facile approach for the preparation of Ag nanoparticles decorated magnetic Fe3O4@SiO2 core shell nanosphere (Ag-MCN) and investigated its potential application for the catalytic reduction of organic pollutants and inhibition of bacterial pathogens. The successful formation of Ag-MCN was confirmed by X-ray diffraction (XRD), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). The average size of this nanosphere was found to be 85 nm and it exhibits superparamagnetic behavior at room temperature. These nanospheres even at low concentration and short incubation period showed good catalytic performance for the reduction of Rhodamine B (RhB) and 4-nitrophenol (4-NP). Further, these magnetic nanosphere possess good antibacterial activity for Gram negative, Escherichia coli (E. coli). Ag-MCN are found to be efficient for complete inhibition of E. coli at a concentration of 50 mg L-1 after incubation for a period of 3 h. Furthermore, the generation of reactive oxygen species (ROS) by nanosphere and its effect in the antibacterial activity has been investigated. These nanospheres exhibit good colloidal stability, recycling capability, and could be easily separated from solution via external magnet. (C) 2015 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-14T13:23:09Z
2016-01-14T13:23:09Z
2015
 
Type Article
 
Identifier COLLOIDS AND SURFACES B-BIOINTERFACES, 133,58-65
0927-7765
1873-4367
http://dx.doi.org/10.1016/j.colsurfb.2015.05.033
http://dspace.library.iitb.ac.in/jspui/handle/100/17605
 
Language en