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 PO _(4) ~(3?) per gram Fe, which was preserved on recycling the material five times.
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机译：通过在表面上结合直径为8.5-18.5 nm的超顺磁性磁铁矿纳米颗粒，六方氮化硼（h-BN）在水性介质中具有磁响应性。复合材料是在涡流式装置（VFD）中动态薄膜在水中连续流动的条件下产生的，其中铁源是通过使用Nd：YAG脉冲激光在液体上方的空气中对纯铁金属靶进行激光烧蚀而生成的铁源激光工作在1064 nm和360 mJ VFD的最佳工作参数是：倾斜45度，外径为0.1 mg mL〜（？1）的20 mm OD（17.5 mm ID）硼硅玻璃管的转速为7.5k rpm，在在注入快速旋转管的底部之前，先用磁力搅拌注射器将其浓缩至1.0 mL min（？1），以保持h-BN在水中的均匀分散。所得的含5.75％（重量）铁的复合材料显示出高的磷酸根离子吸附能力，每克Fe高达171.2 mg PO _（4）〜（3？），在五次循环使用时得以保留。
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