Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal
Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal
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DOI：
10.1021/nn1008897
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发表时间：
2010-07-01
期刊：
影响因子：
17.1
通讯作者：
Kim, Kwang S.
中科院分区：
文献类型：
--
作者：
Chandra, Vimlesh;Park, Jaesung;Kim, Kwang S.
已经通过化学反应合成了磁铁矿-石墨烯杂化物，其中磁铁矿颗粒尺寸类似于10 nm。该复合材料在室温下是超顺磁性的，并且可以通过外部磁场分离。与裸露的磁铁矿颗粒相比，混合物显示出对As（III）和As（V）的高结合能力，其存在于南亚广大地区的饮用水中一直是一个巨大的问题。它们的高结合能力是由于M-RGO复合物中增加的吸附位点，这通过减少裸磁铁矿的聚集而发生。由于复合材料显示出在1 ppb内几乎完全（超过99.9%）的砷去除，因此它们实际上可用于从水中分离砷。
Magnetite-graphene hybrids have been synthesized via a chemical reaction with a magnetite particle size of similar to 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.