Abstract
The rapid assembly of magnetic carbon nanotubes is mediated through the electrostatic attraction of α-haematite nanoparticles to carboxylic groups decorating their outer surface. The system is then stabilised through covalently bonding a silica coat using a 3-aminopropyltriethoxysilane precursor, which creates a thin barrier protecting the α-haematite particles from aggressive pH solutions. The nanocomposites can be effectively dispersed in aqueous solution and can be attracted to an external magnetic field. The proposed method can be used for synthesis of magnetic CNTs suitable for assembling densely packed magnetic arrays, remotely guided drug delivery and organic chemical wastewater remediation with the added benefit of nanomaterial recovery. Therein, p-nitroaniline was demonstrated to still adsorb to uncoated areas of the silica-sheathed magnetic MWCNT composite.
Original language | English |
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Pages (from-to) | 514-518 |
Number of pages | 5 |
Journal | Materials Chemistry and Physics |
Volume | 128 |
Issue number | 3 |
DOIs | |
Publication status | Published - Aug 15 2011 |
Externally published | Yes |
Keywords
- 3-Aminopropyltriethoxysilane (APTES)
- Carbon nanotubes (CNTs)
- Magnetic nanoparticles
- α-Haematite
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics