Journal
MATERIALS RESEARCH INNOVATIONS
Volume 18, Issue -, Pages 32-35Publisher
MANEY PUBLISHING
DOI: 10.1179/1432891714Z.000000000927
Keywords
Maghemite; Magnetic nanoparticles; Massart's procedure; Sol-gel; Nanocomposite
Categories
Funding
- University Malaya Research Grant under Institute of Research, University of Malaya [RP021-2012C]
Ask authors/readers for more resources
First, the superparamagnetic maghemite nanoparticles were synthesised using Massart's procedure. Then, the nanocomposites of the synthesised maghemite nanoparticles and silica were produced by dispersing the as-synthesised maghemite nanoparticles into the silica xerogel prepared by sol-gel technique. The system was then heated for 3 days at 140 degrees C. The phase analysis performed using X-ray diffraction confirmed that the as-synthesised nanoparticles and the nanoparticles within the silica gel were maghemite. Surface characteristic of the nanocomposite was evaluated by N-2 adsorption. The 'pure' silica gel and maghemite nanoparticles showed high values of surface area (150-160 m(2) g(-1)), while the surface area of nanocomposite was less than 40 m(2) g(-1). This was probably due to the formation of dense structures caused by incorporation of maghemite nanoparticles within the pores of silica gel. The pore width increased with increasing content of maghemite nanoparticles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available