Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 16, Pages 3113-3116Publisher
ELSEVIER
DOI: 10.1016/j.physb.2011.12.039
Keywords
Nanocomposites; Hydrophobic aerogels; SAXS; Magnetometry
Categories
Funding
- CONICET [PIP6011]
- ANPCyT [PICT12-14526]
- RN3M of Argentina
- Brazilian Synchrotron Light Laboratory (LNLS) [D11A-SAXS1-8112]
Ask authors/readers for more resources
Magnetic hydrophobic aerogels (MHA) in the form of nanocomposites of silica and maghemite (gamma-Fe2O3) were prepared by one step sol-gel procedure followed by supercritical solvent extraction. Silica alcogels were obtained from TEOS, MTMS, methanol and H2O, and Fe(III) nitrate as magnetic precursor. The hydrophobic property was achieved using the methytrimethoxysilane (MTMS) as co-precursor for surface modification. The so produced nanocomposite aerogels are monolithic, hydrophobic and magnetic. The interconnected porous structure hosts similar to 6 nm size gamma-Fe2O3 particles, has a mean pore diameter of 5 nm, and a specific surface area (SSA) of 698 m(2)/g. Medium range structure of MHA is determined by SAXS, which displays the typical fractal power law behavior with primary particle radius of similar to 1 nm. Magnetic properties of the nanoparticle ensembles hosted in them are studied by means of dc-magnetometry. (C) 2011 Elsevier B.V. All rights reserved.
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