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Solvothermal synthesis of MnFe2O4-graphene composite-Investigation of its adsorption and antimicrobial properties

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Title Solvothermal synthesis of MnFe2O4-graphene composite-Investigation of its adsorption and antimicrobial properties
 
Creator CHELLA, S
KOLLU, P
KOMARALA, EVPR
DOSHI, S
SARANYA, M
FELIX, S
RAMACHANDRAN, R
SARAVANAN, P
KONERU, VL
VENUGOPAL, V
JEONG, SK
GRACE, AN
 
Subject GRAPHENE OXIDE NANOSHEETS
AQUEOUS-SOLUTION
CARBON NANOTUBES
HEAVY-METALS
WATER-PURIFICATION
METHYLENE-BLUE
REMOVAL
IONS
NANOPARTICLES
PERFORMANCE
Magnetic nanoparticles
Graphene
Adsorption
Antibacterial activity
Water treatment
 
Description Graphene manganese ferrite (MnFe2O4-G) composite was prepared by a solvothermal process. The as-prepared graphene manganese ferrite composite was tested for the adsorption of lead (Pb(II)) and cadmium (Cd(II)) ions by analytical methods under diverse experimental parameters. With respect to contact time measurements, the adsorption of Pb and Cd ions increased and reached equilibrium within 120 and 180 min at 37 degrees C with a maximum adsorption at pH 5 and 7 respectively. The Langmuir model correlates to the experimental data showing an adsorption capacity of 100 for Pb(II) and 76.90 mg g(-1) for Cd(II) ions. Thermodynamic studies revealed that the adsorption of Pb and Cd ions onto MnFe2O4-G was spontaneous, exothermic and feasible in the range of 27-47 degrees C. Cytotoxicity behavior of graphene against bacterial cell membrane is well known. To better understand its antimicrobial mechanism, the antibacterial activity of graphene and MnFe2O4-G nanocomposite was compared. Under similar concentration and incubation conditions, nanocomposite MnFe2O4-G dispersion showed the highest antibacterial activity of 82%, as compared to graphene showing 37% cell loss. Results showed that the prepared composite possess good adsorption efficiency and thus could be considered as an excellent material for removal of toxic heavy metal ions as explained by adsorption isotherm. Hence MnFe2O4-G can be used as an adsorbent as well as an antimicrobial agent. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-14T12:58:16Z
2016-01-14T12:58:16Z
2015
 
Type Article
 
Identifier APPLIED SURFACE SCIENCE, 327,27-36
0169-4332
1873-5584
http://dx.doi.org/10.1016/j.apsusc.2014.10.096
http://dspace.library.iitb.ac.in/jspui/handle/100/17556
 
Language en