采用简便一步溶剂热法合成了Fe3O4纳米晶修饰磁性石墨烯纳米复合物(GO/Fe3O4)。表征了其结构形貌并研究了其对水溶液中阳离子染料亚甲基蓝(MB)的吸附性能。结果表明,以Fe(acac)3为铁源,不添加任何配体,可合成高比表面积的GO/Fe3O4(606.4m2/g);通过π-π堆叠和电荷共同作用,其对水溶液中的MB显示出高效吸附能力,最大平衡吸附容量可达1013.2mg/g。GO/Fe3O4对MB的吸附符合准二级动力学模型和Langmuir等温吸附模型。该材料有望成为一种优良的吸附剂用于水体中阳离子污染物的去除。
A magnetic graphene oxide nanocomposite decorated with Fe3O4 nanocrystals (GO/Fe3O4) was synthesized via a simple one-step solvothermal method.The structure and morphology,and adsorption performance of GO/Fe3O4 for a cationic dye (methylene blue,MB) from aqueous solution was investigated.The results indicated that,without addition of any ligands,GO/Fe3O4 with a high specific surface area of 606.4m2/g could be easily synthesized using Fe(acac)3 as the iron source.The resulted GO/Fe3O4 demonstrated rather high adsorption capacity of 1013.2mg/g via π-π stacking and electrostatic interactions between GO/Fe3O4 and MB.The MB adsorption onto MGO fitted well the pseudo-second-order kinetic and Langmuir models,respectively.Such the magnetic graphene nanocomposite could serve as an excellent adsorbent for effective removal of cationic pollutants from water body.
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