Investigation of Magnetic Properties of γ-Fe2O3 NP-Decorated Carbon Nanostructured Mats

Hammad Younes; Md Mahfuzur Rahman; George Ni; Amal Al Ghaferi; Rashid Abu Al Rub; Ibrahim Bsoul

doi:10.1007/s11837-019-03631-4

Investigation of Magnetic Properties of γ-Fe₂O₃ NP-Decorated Carbon Nanostructured Mats

Hammad Younes
, Md Mahfuzur Rahman
, George Ni
, Amal Al Ghaferi
, Rashid Abu Al Rub
, Ibrahim Bsoul

Mechanical & Nuclear Engineering

Military Institute of Science and Technology
Massachusetts Institute of Technology
Al Al-Bayt University

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

10 Scopus citations

Abstract

It has been experimentally demonstrated that a carbon nanostructure (CNS)-based structure, called CNS mats, can yield superior magnetic properties. The structure is obtained by decorating CNS with γ-Fe₂O₃ nanoparticles (NPs) in a three-dimensional (3D) network structure. γ-Fe₂O₃ NPs are coated on the CNS, resulting in enhanced magnetic properties. The experimental characterization and theoretical analysis reveal that CNS mats decorated with γ-Fe₂O₃ NPs show superior magnetic properties compared with pristine CNS, as a result of the homogeneous dispersion of γ-Fe₂O₃ NPs and the highly aligned structure of the CNS. The coercive field (H_c), saturation magnetization (M_s), and remanent magnetization (M_r) were found to be 126 Oe, 22.3 emu/g, and 7.15 emu/g, respectively. In addition, scanning electron microscopy (SEM) and atomic force microscopy (AFM) characterization showed that the carbon nanotubes (CNTs) in each CNS flake within the CNS mat remained well aligned and formed an interconnected 3D network structure. This results in a robust porous structure with high electrical conductivity. Thermogravimetric analysis (TGA) revealed that the presence of the γ-Fe₂O₃ NPs provides a protective layer for the CNS and results in good thermal stability. The fabricated ultrathin CNS mat offers superior magnetic and electrical performance, making it an attractive candidate for microwave absorption, along with other applications such as electromagnetic shielding, sensors, lithium-ion batteries, and polymer composites.

Original language	British English
Pages (from-to)	3142-3150
Number of pages	9
Journal	JOM
Volume	71
Issue number	9
DOIs	https://doi.org/10.1007/s11837-019-03631-4
State	Published - 15 Sep 2019

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title = "Investigation of Magnetic Properties of γ-Fe2O3 NP-Decorated Carbon Nanostructured Mats",

abstract = "It has been experimentally demonstrated that a carbon nanostructure (CNS)-based structure, called CNS mats, can yield superior magnetic properties. The structure is obtained by decorating CNS with γ-Fe2O3 nanoparticles (NPs) in a three-dimensional (3D) network structure. γ-Fe2O3 NPs are coated on the CNS, resulting in enhanced magnetic properties. The experimental characterization and theoretical analysis reveal that CNS mats decorated with γ-Fe2O3 NPs show superior magnetic properties compared with pristine CNS, as a result of the homogeneous dispersion of γ-Fe2O3 NPs and the highly aligned structure of the CNS. The coercive field (Hc), saturation magnetization (Ms), and remanent magnetization (Mr) were found to be 126 Oe, 22.3 emu/g, and 7.15 emu/g, respectively. In addition, scanning electron microscopy (SEM) and atomic force microscopy (AFM) characterization showed that the carbon nanotubes (CNTs) in each CNS flake within the CNS mat remained well aligned and formed an interconnected 3D network structure. This results in a robust porous structure with high electrical conductivity. Thermogravimetric analysis (TGA) revealed that the presence of the γ-Fe2O3 NPs provides a protective layer for the CNS and results in good thermal stability. The fabricated ultrathin CNS mat offers superior magnetic and electrical performance, making it an attractive candidate for microwave absorption, along with other applications such as electromagnetic shielding, sensors, lithium-ion batteries, and polymer composites.",

author = "Hammad Younes and Rahman, \{Md Mahfuzur\} and George Ni and \{Al Ghaferi\}, Amal and \{Al Rub\}, \{Rashid Abu\} and Ibrahim Bsoul",

note = "Funding Information: The authors gratefully thank Dr. Florent for help with TEM. Dr. Amal would like to thank Masdar Institute of Science and Technology for financial support. Funding Information: The authors gratefully thank Dr. Florent for help with TEM. Dr. Amal would like to thank Masdar Institute of Science and Technology for financial support. Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals \& Materials Society.",

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T1 - Investigation of Magnetic Properties of γ-Fe2O3 NP-Decorated Carbon Nanostructured Mats

AU - Younes, Hammad

AU - Rahman, Md Mahfuzur

AU - Ni, George

AU - Al Ghaferi, Amal

AU - Al Rub, Rashid Abu

AU - Bsoul, Ibrahim

N1 - Funding Information: The authors gratefully thank Dr. Florent for help with TEM. Dr. Amal would like to thank Masdar Institute of Science and Technology for financial support. Funding Information: The authors gratefully thank Dr. Florent for help with TEM. Dr. Amal would like to thank Masdar Institute of Science and Technology for financial support. Publisher Copyright: © 2019, The Minerals, Metals & Materials Society.

PY - 2019/9/15

Y1 - 2019/9/15

N2 - It has been experimentally demonstrated that a carbon nanostructure (CNS)-based structure, called CNS mats, can yield superior magnetic properties. The structure is obtained by decorating CNS with γ-Fe2O3 nanoparticles (NPs) in a three-dimensional (3D) network structure. γ-Fe2O3 NPs are coated on the CNS, resulting in enhanced magnetic properties. The experimental characterization and theoretical analysis reveal that CNS mats decorated with γ-Fe2O3 NPs show superior magnetic properties compared with pristine CNS, as a result of the homogeneous dispersion of γ-Fe2O3 NPs and the highly aligned structure of the CNS. The coercive field (Hc), saturation magnetization (Ms), and remanent magnetization (Mr) were found to be 126 Oe, 22.3 emu/g, and 7.15 emu/g, respectively. In addition, scanning electron microscopy (SEM) and atomic force microscopy (AFM) characterization showed that the carbon nanotubes (CNTs) in each CNS flake within the CNS mat remained well aligned and formed an interconnected 3D network structure. This results in a robust porous structure with high electrical conductivity. Thermogravimetric analysis (TGA) revealed that the presence of the γ-Fe2O3 NPs provides a protective layer for the CNS and results in good thermal stability. The fabricated ultrathin CNS mat offers superior magnetic and electrical performance, making it an attractive candidate for microwave absorption, along with other applications such as electromagnetic shielding, sensors, lithium-ion batteries, and polymer composites.

AB - It has been experimentally demonstrated that a carbon nanostructure (CNS)-based structure, called CNS mats, can yield superior magnetic properties. The structure is obtained by decorating CNS with γ-Fe2O3 nanoparticles (NPs) in a three-dimensional (3D) network structure. γ-Fe2O3 NPs are coated on the CNS, resulting in enhanced magnetic properties. The experimental characterization and theoretical analysis reveal that CNS mats decorated with γ-Fe2O3 NPs show superior magnetic properties compared with pristine CNS, as a result of the homogeneous dispersion of γ-Fe2O3 NPs and the highly aligned structure of the CNS. The coercive field (Hc), saturation magnetization (Ms), and remanent magnetization (Mr) were found to be 126 Oe, 22.3 emu/g, and 7.15 emu/g, respectively. In addition, scanning electron microscopy (SEM) and atomic force microscopy (AFM) characterization showed that the carbon nanotubes (CNTs) in each CNS flake within the CNS mat remained well aligned and formed an interconnected 3D network structure. This results in a robust porous structure with high electrical conductivity. Thermogravimetric analysis (TGA) revealed that the presence of the γ-Fe2O3 NPs provides a protective layer for the CNS and results in good thermal stability. The fabricated ultrathin CNS mat offers superior magnetic and electrical performance, making it an attractive candidate for microwave absorption, along with other applications such as electromagnetic shielding, sensors, lithium-ion batteries, and polymer composites.

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DO - 10.1007/s11837-019-03631-4

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