Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/326792
Type: Artigo
Title: Enhanced Magnetic Performance Of Iron Oxide Nanoparticles Anchored Pristine/ N-doped Multi-walled Carbon Nanotubes By Microwave-assisted Approach
Author: Kumar
Rajesh; Singh
Rajesh K.; Tiwari
Vidhu S.; Yadav
Amarjeet; Savu
Raluca; Vaz
Alfredo R.; Moshkalev
Stanislav A.
Abstract: We report the facile and easy synthesis process of iron oxide (Fe3O4) nanoparticles (Fe3O4 NPs) modified surface of carbon nanotubes (CNTs) and their magnetic properties. The partially aligned multi-walled carbon nanotubes (MWCNTs) and nitrogen-doped multi-walled carbon nanotubes (CNx-MWCNTs) were synthesized through chemical vapor deposition (CVD) method. In next step, synthesized MWCNTs and CNx-MWCNTs were anchored with Fe3O4 NPs using microwave (MW) irradiation. The size of anchored Fe3O4 NPs on surface of Fe@MWCNTs and Fe@CNx-MWCNTs were 5-15 and 5-10 nm, respectively. The investigation results of magnetic properties revealed that the saturation magnetization of Fe@CNx-MWCNTs was improved after N-doping and Fe@CNx-MWCNTs showed superior magnetization behaviour than Fe@MWCNTs. The saturation magnetization value increases from 26.1 to 30.4 emu/g after N-doping. The improved magnetic performance of Fe@CNx-MWCNTs may be due to the induced structural defect on the surfaces which supports Fe3O4 NPs to attach and consequently improves the saturation magnetization. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Chemical Vapor Deposition
Microwave Irradiation
Surface Structural Defect
Nitrogen
Doping
Fe3o4 Nanoparticles
Magnetic Performance
Editor: Elsevier Science SA
Lausanne
Rights: fechado
Identifier DOI: 10.1016/j.jallcom.2016.11.010
Address: http://www.sciencedirect.com/science/article/pii/S0925838816334685
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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