Preparation of maghemite-silica nanocomposites using sol-gel technique

Superparamagnetic maghemite nanoparticles were successfully produced using Massart's procedure. Nanocomposites consisting of the synthesized maghemite nanoparticles and silica were produced by dispersing the as-synthesized maghemite nanoparticles into the silica xerogel, which was prepared by s...

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Main Authors:	Ang, Bee Chin, Yaacob, Iskandar Idris
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2010
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/1/Preparation_of_Maghemite-Silica_Nanocomposites_Using.pdf

id	iium-16409
recordtype	eprints
spelling	iium-164092012-02-01T01:03:52Z http://irep.iium.edu.my/16409/ Preparation of maghemite-silica nanocomposites using sol-gel technique Ang, Bee Chin Yaacob, Iskandar Idris TJ Mechanical engineering and machinery Superparamagnetic maghemite nanoparticles were successfully produced using Massart's procedure. Nanocomposites consisting of the synthesized maghemite nanoparticles and silica were produced by dispersing the as-synthesized maghemite nanoparticles into the silica xerogel, which was prepared by sol-gel technique. The system was then heated for 3 days at 140°C. A variety of weight ratios of Fe2O3/SiO2 was investigated. The nanocomposites were characterized using TGA, XRD, TEM and AGM. TGA thermogram showed one significant weight loss at around 250°C. It was caused by dehydration and evaporation of solvent from sol-gel process. XRD showed that the dispersed particles were still maghemite. TEM micrographs showed that the maghemite nanoparticles were in spherical shape and they were homogeneously incorporated in the silica matrix. The values of magnetization at 10kOe applied field were in the range of 1.79emu/g to 9.53emu/g depending of the Fe 2O3/SiO2 ratio. Reduction of average crystallite size of dispersed maghemite particles was observed after encapsulation process. Increasing weight ratio of Fe2O 3/SiO2 caused increase of the average crystallite size of maghemite nanoparticles. © (2010) Trans Tech Publications. Trans Tech Publications, Switzerland 2010 Article PeerReviewed application/pdf en http://irep.iium.edu.my/16409/1/Preparation_of_Maghemite-Silica_Nanocomposites_Using.pdf Ang, Bee Chin and Yaacob, Iskandar Idris (2010) Preparation of maghemite-silica nanocomposites using sol-gel technique. Advanced Materials Research, 97-101. pp. 2140-2143. ISSN 1022-6680 http://www.scitec.ch/1022-6680/ 10.4028/www.scientific.net/AMR.97-101.2140
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ang, Bee Chin Yaacob, Iskandar Idris Preparation of maghemite-silica nanocomposites using sol-gel technique
description	Superparamagnetic maghemite nanoparticles were successfully produced using Massart's procedure. Nanocomposites consisting of the synthesized maghemite nanoparticles and silica were produced by dispersing the as-synthesized maghemite nanoparticles into the silica xerogel, which was prepared by sol-gel technique. The system was then heated for 3 days at 140°C. A variety of weight ratios of Fe2O3/SiO2 was investigated. The nanocomposites were characterized using TGA, XRD, TEM and AGM. TGA thermogram showed one significant weight loss at around 250°C. It was caused by dehydration and evaporation of solvent from sol-gel process. XRD showed that the dispersed particles were still maghemite. TEM micrographs showed that the maghemite nanoparticles were in spherical shape and they were homogeneously incorporated in the silica matrix. The values of magnetization at 10kOe applied field were in the range of 1.79emu/g to 9.53emu/g depending of the Fe 2O3/SiO2 ratio. Reduction of average crystallite size of dispersed maghemite particles was observed after encapsulation process. Increasing weight ratio of Fe2O 3/SiO2 caused increase of the average crystallite size of maghemite nanoparticles. © (2010) Trans Tech Publications.
format	Article
author	Ang, Bee Chin Yaacob, Iskandar Idris
author_facet	Ang, Bee Chin Yaacob, Iskandar Idris
author_sort	Ang, Bee Chin
title	Preparation of maghemite-silica nanocomposites using sol-gel technique
title_short	Preparation of maghemite-silica nanocomposites using sol-gel technique
title_full	Preparation of maghemite-silica nanocomposites using sol-gel technique
title_fullStr	Preparation of maghemite-silica nanocomposites using sol-gel technique
title_full_unstemmed	Preparation of maghemite-silica nanocomposites using sol-gel technique
title_sort	preparation of maghemite-silica nanocomposites using sol-gel technique
publisher	Trans Tech Publications, Switzerland
publishDate	2010
url	http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/ http://irep.iium.edu.my/16409/1/Preparation_of_Maghemite-Silica_Nanocomposites_Using.pdf
first_indexed	2023-09-18T20:25:13Z
last_indexed	2023-09-18T20:25:13Z
_version_	1777408371459096576

Preparation of maghemite-silica nanocomposites using sol-gel technique

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