We fabricated a magnetite nanoparticle-graphene oxide (GO) hybrid via a non-chemical and one-step process assisted by ultrasound in an aqueous solution where the nanoparticle attached to the hydrophobic region on graphite oxide (multi-layered GO) which, at the same time, was exfoliated. Unlike chemical methods such as precipitation, oxygen-containing functional groups on GO have not been consumed or reduced during the hybridization, leading that this hybrid exhibited good water solubility and high adsorption capacity for heavy metal ions such as Pb(II) and Au(III). After the adsorption, the hybrid was instantly collected using a magnet. This method can be useful for hybridizing various nanoparticles with GO.

中文翻译：

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超声辅助下磁铁矿纳米颗粒在氧化石墨烯上的瞬时整合，可实现有效的重金属离子回收。

我们通过超声辅助的非化学和一步法工艺在水溶液中制备了磁铁矿纳米颗粒-氧化石墨烯（GO）杂化物，其中纳米颗粒附着在氧化石墨（多层GO）的疏水区域上，同时，被剥落。与化学方法（例如沉淀法）不同，杂交过程中GO上的含氧官能团没有被消耗或还原，从而导致该杂化物表现出良好的水溶性和对重金属离子（例如Pb（II）和Au（III））的高吸附能力）。吸附后，立即用磁铁收集杂种。该方法可用于使各种纳米颗粒与GO杂交。