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Title: High-yield synthesis and characterization of monodisperse sub-microsized CoFe{sub 2}O{sub 4} octahedra

Abstract

In this study, sub-microsized CoFe{sub 2}O{sub 4} octahedra with a high yield are synthesized via a simple hydrothermal route under mild conditions. The as-prepared products are characterized by conventional techniques of XRD, SEM, TEM, ED and HR-TEM. The results show that the as-synthesized sample exhibits octahedral morphology with a narrow size distribution. The edge size of CoFe{sub 2}O{sub 4} octahedra is estimated to be about 0.10-0.14 {mu}m. The growth process is also monitored by time and temperature-dependent observation. It is found that the reaction temperature has no obvious influence on the product morphology but a significant effect on the size of CoFe{sub 2}O{sub 4} octahedra, while the reaction time determines the final morphology of the product. Moreover, it is displayed that the citrate ions play a key role in the formation of CoFe{sub 2}O{sub 4} octahedra. Furthermore, the possible growth mechanism of the sub-microsized CoFe{sub 2}O{sub 4} octahedra is discussed on the basis of a series of experiments. Magnetic measurements show that sub-micro-sized CoFe{sub 2}O{sub 4} octahedra exhibit obvious ferromagnetic behaviors. The saturation magnetization (M {sub s}), remanent magnetization (M {sub r}), and coercivity (H {sub c}) are determined to be 85.8, 29.2 emu/g and 892 Oe, respectively. - Graphicalmore » abstract: Sub-micro-sized CoFe{sub 2}O{sub 4} octahedra with a high yield are synthesized via a simple hydrothermal route under mild conditions. TEM image shows that the edge size of CoFe{sub 2}O{sub 4} octahedra is estimated to be about 0.10-0.14 {mu}m.« less

Authors:
 [1];  [2];  [3]
  1. Department of Chemistry, Luoyang Normal University, Luoyang 471022 (China)
  2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080 (China), E-mail: syfu@cl.cryo.ac.cn
  3. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080 (China)
Publication Date:
OSTI Identifier:
21015671
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2006.11.003; PII: S0022-4596(06)00588-3; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CITRATES; COBALT OXIDES; COERCIVE FORCE; IRON OXIDES; MAGNETIZATION; MORPHOLOGY; SCANNING ELECTRON MICROSCOPY; SYNTHESIS; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Liu Xianming, Fu Shaoyun, and Zhu Luping. High-yield synthesis and characterization of monodisperse sub-microsized CoFe{sub 2}O{sub 4} octahedra. United States: N. p., 2007. Web.
Liu Xianming, Fu Shaoyun, & Zhu Luping. High-yield synthesis and characterization of monodisperse sub-microsized CoFe{sub 2}O{sub 4} octahedra. United States.
Liu Xianming, Fu Shaoyun, and Zhu Luping. Thu . "High-yield synthesis and characterization of monodisperse sub-microsized CoFe{sub 2}O{sub 4} octahedra". United States. doi:.
@article{osti_21015671,
title = {High-yield synthesis and characterization of monodisperse sub-microsized CoFe{sub 2}O{sub 4} octahedra},
author = {Liu Xianming and Fu Shaoyun and Zhu Luping},
abstractNote = {In this study, sub-microsized CoFe{sub 2}O{sub 4} octahedra with a high yield are synthesized via a simple hydrothermal route under mild conditions. The as-prepared products are characterized by conventional techniques of XRD, SEM, TEM, ED and HR-TEM. The results show that the as-synthesized sample exhibits octahedral morphology with a narrow size distribution. The edge size of CoFe{sub 2}O{sub 4} octahedra is estimated to be about 0.10-0.14 {mu}m. The growth process is also monitored by time and temperature-dependent observation. It is found that the reaction temperature has no obvious influence on the product morphology but a significant effect on the size of CoFe{sub 2}O{sub 4} octahedra, while the reaction time determines the final morphology of the product. Moreover, it is displayed that the citrate ions play a key role in the formation of CoFe{sub 2}O{sub 4} octahedra. Furthermore, the possible growth mechanism of the sub-microsized CoFe{sub 2}O{sub 4} octahedra is discussed on the basis of a series of experiments. Magnetic measurements show that sub-micro-sized CoFe{sub 2}O{sub 4} octahedra exhibit obvious ferromagnetic behaviors. The saturation magnetization (M {sub s}), remanent magnetization (M {sub r}), and coercivity (H {sub c}) are determined to be 85.8, 29.2 emu/g and 892 Oe, respectively. - Graphical abstract: Sub-micro-sized CoFe{sub 2}O{sub 4} octahedra with a high yield are synthesized via a simple hydrothermal route under mild conditions. TEM image shows that the edge size of CoFe{sub 2}O{sub 4} octahedra is estimated to be about 0.10-0.14 {mu}m.},
doi = {},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 180,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}