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Title: A highly coercive carbon nanotube coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals synthesized by chemical precipitation-hydrothermal process

Abstract

Novel magnetic composites (Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs) of multi-walled carbon nanotubes (MWCNTs) coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals were synthesized by chemical precipitation-hydrothermal process. The composites were characterized by X-ray powder diffractometer (XRD), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectroscopy (FTIR), Moessbauer spectroscopy (MS), transmission electron microscopy (TEM), and selected area electron diffraction (SAED), etc. A temperature of about 200 deg. C was identified to be an appropriate hydrothermal condition to obtain Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs, being lower than the synthesis temperature of a single-phase Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals. The sizes of Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} in the composites were smaller than those of Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals in single phase. The composites exhibited more superparamagnetic than Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals in their relaxation behaviors. The magnetic properties measured by a vibrating sample magnetometer showed that the composites had a high coercive field of 386.0 Oe at room temperature, higher than those of MWCNT and Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals. - Graphical abstract: Novel magnetic composites (Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs) of multi-walled carbon nanotubes (MWCNTs) coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals were synthesized bymore » chemical precipitation-hydrothermal process. The composites had a high coercive field of 386.0 Oe, higher than those of MWCNT and Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals.« less

Authors:
 [1];  [2]; ;  [1];  [2]
  1. College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060 (China)
  2. College of Material Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Material, Donghua University, Shanghai 200051 (China)
Publication Date:
OSTI Identifier:
21043746
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 180; Journal Issue: 11; Other Information: DOI: 10.1016/j.jssc.2007.08.018; PII: S0022-4596(07)00352-0; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON; ELECTRON DIFFRACTION; FOURIER TRANSFORM SPECTROMETERS; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRON OXIDES; MAGNETIC PROPERTIES; MOESSBAUER EFFECT; NANOTUBES; NICKEL COMPOUNDS; PRECIPITATION; SUPERPARAMAGNETISM; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; ZINC COMPOUNDS

Citation Formats

Huiqun, Cao, Zhu Meifang, Yaogang, Li, Jianhong, Liu, Zhuo, Ni, and Zongyi, Qin. A highly coercive carbon nanotube coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals synthesized by chemical precipitation-hydrothermal process. United States: N. p., 2007. Web.
Huiqun, Cao, Zhu Meifang, Yaogang, Li, Jianhong, Liu, Zhuo, Ni, & Zongyi, Qin. A highly coercive carbon nanotube coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals synthesized by chemical precipitation-hydrothermal process. United States.
Huiqun, Cao, Zhu Meifang, Yaogang, Li, Jianhong, Liu, Zhuo, Ni, and Zongyi, Qin. 2007. "A highly coercive carbon nanotube coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals synthesized by chemical precipitation-hydrothermal process". United States.
@article{osti_21043746,
title = {A highly coercive carbon nanotube coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals synthesized by chemical precipitation-hydrothermal process},
author = {Huiqun, Cao and Zhu Meifang and Yaogang, Li and Jianhong, Liu and Zhuo, Ni and Zongyi, Qin},
abstractNote = {Novel magnetic composites (Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs) of multi-walled carbon nanotubes (MWCNTs) coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals were synthesized by chemical precipitation-hydrothermal process. The composites were characterized by X-ray powder diffractometer (XRD), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectroscopy (FTIR), Moessbauer spectroscopy (MS), transmission electron microscopy (TEM), and selected area electron diffraction (SAED), etc. A temperature of about 200 deg. C was identified to be an appropriate hydrothermal condition to obtain Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs, being lower than the synthesis temperature of a single-phase Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals. The sizes of Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} in the composites were smaller than those of Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals in single phase. The composites exhibited more superparamagnetic than Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals in their relaxation behaviors. The magnetic properties measured by a vibrating sample magnetometer showed that the composites had a high coercive field of 386.0 Oe at room temperature, higher than those of MWCNT and Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals. - Graphical abstract: Novel magnetic composites (Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}-MWCNTs) of multi-walled carbon nanotubes (MWCNTs) coated with Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals were synthesized by chemical precipitation-hydrothermal process. The composites had a high coercive field of 386.0 Oe, higher than those of MWCNT and Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} nanocrystals.},
doi = {},
url = {https://www.osti.gov/biblio/21043746}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 11,
volume = 180,
place = {United States},
year = {Thu Nov 15 00:00:00 EST 2007},
month = {Thu Nov 15 00:00:00 EST 2007}
}