Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea.
ACS Nano. 2010 Jul 27;4(7):3979-86. doi: 10.1021/nn1008897.
Magnetite-graphene hybrids have been synthesized via a chemical reaction with a magnetite particle size of approximately 10 nm. The composites are superparamagnetic at room temperature and can be separated by an external magnetic field. As compared to bare magnetite particles, the hybrids show a high binding capacity for As(III) and As(V), whose presence in the drinking water in wide areas of South Asia has been a huge problem. Their high binding capacity is due to the increased adsorption sites in the M-RGO composite which occurs by reducing the aggregation of bare magnetite. Since the composites show near complete (over 99.9%) arsenic removal within 1 ppb, they are practically usable for arsenic separation from water.
通过化学反应合成了粒径约为 10nm 的磁铁矿-石墨烯杂化物。该复合材料在室温下具有超顺磁性，可通过外部磁场分离。与裸露的磁铁矿颗粒相比，该杂化物对砷（III）和砷（V）具有高的结合能力，砷（III）和砷（V）在南亚广大地区的饮用水中存在是一个巨大的问题。它们的高结合能力是由于 M-RGO 复合材料中增加了吸附位点，这是通过减少裸露磁铁矿的聚集而产生的。由于复合材料在 1ppb 内几乎完全（超过 99.9%）去除砷，因此它们可实际用于从水中分离砷。
