Continuous flow synthesis of phosphate binding h-BN@magnetite hybrid material

Ahmed Hussein Mohammed Al-Antaki, Xuan Luo, Alex Duan, Robert N. Lamb, Ela Eroglu, Wayne Douglas Hutchison, Yichao Zou, Jin Zou, Colin Llewellyn Raston

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)40829-40835
Number of pages7
JournalRSC Advances
Volume8
Issue number71
DOIs
Publication statusPublished - 5 Dec 2018

Keywords

  • Nanotechnology
  • superparamagnetic magnetite
  • phosphate ion adsorption
  • hBN@magnetite

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