Polyethylenimine modified magnetic graphene oxide nanocomposites for Cu2+ removal
作者： Ning Sui , Lina Wang , Xiaohan Wu , Xinghua Li , Jing Sui
DOI: 10.1039/C4RA11669K
关键词:
摘要: Fe3O4 nanoparticles were synthesized on graphene oxide (GO), then mixed with polyethylenimine to obtain GO/Fe3O4/PEI nanocomposites. Due the high surface area of GO, superparamagnetism Fe3O4, and excellent complex ability PEI, nanocomposites showed extremely Cu2+ removal efficiency. The capacity was 157 mg g−1, which is higher than most reported results. adsorption kinetics could be best described by a pseudo-second-order model. Moreover, easily recycled magnetic separation. After five cycles, efficiency remained 84%.
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