Dielectric and dye adsorption properties of luminescent-superparamagnetic MFe2O4 (M = Mn, Mg)/reduced graphene oxide composites

El Hadji Mamour Sakho; Sabu Thomas; Nandakumar Kalarikkal; Oluwatobi S. Oluwafemi

doi:10.1016/j.ceramint.2017.11.181

Dielectric and dye adsorption properties of luminescent-superparamagnetic MFe₂O₄ (M = Mn, Mg)/reduced graphene oxide composites

El Hadji Mamour Sakho, Sabu Thomas, Nandakumar Kalarikkal, Oluwatobi S. Oluwafemi

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

MFe₂O₄ (M = Mn, Mg)/reduced graphene oxide (MFe₂O₄/RGO) nanocomposites were synthesized through a simple and novel pressure cooker assisted solvothermal method. The nanocomposites were characterized using x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–Vis absorption and photoluminescence spectroscopy, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The optical analyses showed that, the MFe₂O₄/RGO materials have good photoluminescence (PL) with excitation dependent PL properties while magnetic characterization indicated that, the as-synthesized MFe₂O₄/RGO nanocomposites exhibits superparamagnetic behavior. Dielectric spectroscopy analysis showed enhanced dielectric constant, dielectric loss and AC conductivity for MFe₂O₄/RGO, compared to graphite oxide (GO). The study on methyl blue (MB) dye adsorption revealed that, the as-prepared nanocomposites have strong and recyclable adsorption for MB.

Original language	English
Pages (from-to)	3904-3914
Number of pages	11
Journal	Ceramics International
Volume	44
Issue number	4
DOIs	https://doi.org/10.1016/j.ceramint.2017.11.181
Publication status	Published - Mar 2018

Keywords

Dielectric
Dye adsorption
Luminescence
Superparamagnetic
Synthesis

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2017.11.181

Cite this

@article{b51af51f112e41ddb4034868157f6a45,

title = "Dielectric and dye adsorption properties of luminescent-superparamagnetic MFe2O4 (M = Mn, Mg)/reduced graphene oxide composites",

abstract = "MFe2O4 (M = Mn, Mg)/reduced graphene oxide (MFe2O4/RGO) nanocomposites were synthesized through a simple and novel pressure cooker assisted solvothermal method. The nanocomposites were characterized using x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–Vis absorption and photoluminescence spectroscopy, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The optical analyses showed that, the MFe2O4/RGO materials have good photoluminescence (PL) with excitation dependent PL properties while magnetic characterization indicated that, the as-synthesized MFe2O4/RGO nanocomposites exhibits superparamagnetic behavior. Dielectric spectroscopy analysis showed enhanced dielectric constant, dielectric loss and AC conductivity for MFe2O4/RGO, compared to graphite oxide (GO). The study on methyl blue (MB) dye adsorption revealed that, the as-prepared nanocomposites have strong and recyclable adsorption for MB.",

keywords = "Dielectric, Dye adsorption, Luminescence, Superparamagnetic, Synthesis",

author = "Sakho, {El Hadji Mamour} and Sabu Thomas and Nandakumar Kalarikkal and Oluwafemi, {Oluwatobi S.}",

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year = "2018",

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T1 - Dielectric and dye adsorption properties of luminescent-superparamagnetic MFe2O4 (M = Mn, Mg)/reduced graphene oxide composites

AU - Sakho, El Hadji Mamour

AU - Thomas, Sabu

AU - Kalarikkal, Nandakumar

AU - Oluwafemi, Oluwatobi S.

PY - 2018/3

Y1 - 2018/3

N2 - MFe2O4 (M = Mn, Mg)/reduced graphene oxide (MFe2O4/RGO) nanocomposites were synthesized through a simple and novel pressure cooker assisted solvothermal method. The nanocomposites were characterized using x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–Vis absorption and photoluminescence spectroscopy, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The optical analyses showed that, the MFe2O4/RGO materials have good photoluminescence (PL) with excitation dependent PL properties while magnetic characterization indicated that, the as-synthesized MFe2O4/RGO nanocomposites exhibits superparamagnetic behavior. Dielectric spectroscopy analysis showed enhanced dielectric constant, dielectric loss and AC conductivity for MFe2O4/RGO, compared to graphite oxide (GO). The study on methyl blue (MB) dye adsorption revealed that, the as-prepared nanocomposites have strong and recyclable adsorption for MB.

AB - MFe2O4 (M = Mn, Mg)/reduced graphene oxide (MFe2O4/RGO) nanocomposites were synthesized through a simple and novel pressure cooker assisted solvothermal method. The nanocomposites were characterized using x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–Vis absorption and photoluminescence spectroscopy, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The optical analyses showed that, the MFe2O4/RGO materials have good photoluminescence (PL) with excitation dependent PL properties while magnetic characterization indicated that, the as-synthesized MFe2O4/RGO nanocomposites exhibits superparamagnetic behavior. Dielectric spectroscopy analysis showed enhanced dielectric constant, dielectric loss and AC conductivity for MFe2O4/RGO, compared to graphite oxide (GO). The study on methyl blue (MB) dye adsorption revealed that, the as-prepared nanocomposites have strong and recyclable adsorption for MB.

KW - Dielectric

KW - Dye adsorption

KW - Luminescence

KW - Superparamagnetic

KW - Synthesis

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