Abstract
Hexagonal boron nitride (h-BN) is rendered magnetically responsive in aqueous media by binding superparamagnetic magnetite nanoparticles 8.5-18.5 nm in diameter on the surface. The composite material was generated under continuous flow in water in a dynamic thin film in a vortex fluidic device (VFD) with the source of iron generated by laser ablation of a pure iron metal target in the air above the liquid using a Nd:YAG pulsed laser operating at 1064 nm and 360 mJ. Optimum operating parameters of the VFD were a rotational speed of 7.5k rpm for the 20 mm OD (17.5 mm ID) borosilicate glass tube inclined at 45 degrees, with a h-BN concentration at 0.1 mg mL−1, delivered at 1.0 mL min−1 using a magnetically stirred syringe to keep the h-BN uniformly dispersed in water prior to injection into the base of the rapidly rotating tube. The resulting composite material, containing 5.75% weight of iron, exhibited high phosphate ion adsorption capacity, up to 171.2 mg PO4 3− per gram Fe, which was preserved on recycling the material five times.
Original language | English |
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Pages (from-to) | 40829-40835 |
Number of pages | 7 |
Journal | RSC Advances |
Volume | 8 |
Issue number | 71 |
DOIs | |
Publication status | Published - 5 Dec 2018 |
Keywords
- Nanotechnology
- superparamagnetic magnetite
- phosphate ion adsorption
- hBN@magnetite