Polyethylenimine modified magnetic graphene oxide nanocomposites for Cu2+ removal

被引：58
作者：
Sui, Ning [1 ]
Wang, Lina [3 ]
Wu, Xiaohan [1 ]
Li, Xinghua [1 ]
Sui, Jing [1 ]
Xiao, Hailian [1 ]
Liu, Manhong [1 ]
Wan, Jun [3 ]
Yu, William W. [1 ,2 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
[2] Louisiana State Univ, Dept Chem & Phys, Shreveport, LA 71115 USA
[3] Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao 266042, Peoples R China
来源：
RSC ADVANCES | 2015年 / 5卷 / 01期
关键词：
HEAVY-METAL IONS; FE3O4; NANOPARTICLES; AQUEOUS-SOLUTION; EQUILIBRIUM; ADSORPTION; ADSORBENT; CU(II); COMPOSITE; CHITOSAN; COPPER;
D O I：
10.1039/c4ra11669k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Fe3O4 nanoparticles were synthesized on graphene oxide (GO), then mixed with polyethylenimine to obtain GO/Fe3O4/PEI nanocomposites. Due to the high surface area of GO, superparamagnetism of Fe3O4, and excellent complex ability of PEI, the nanocomposites showed extremely high Cu2+ removal efficiency. The Cu2+ removal capacity was 157 mg g(-1), which is higher than most reported results. The adsorption kinetics could be best described by a pseudo-second-order model. Moreover, GO/Fe3O4/PEI nanocomposites could be easily recycled by magnetic separation. After five cycles, the removal efficiency remained 84%.
引用
收藏
页码：746 / 752
页数：7
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