Journal
RSC ADVANCES
Volume 5, Issue 1, Pages 746-752Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra11669k
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Funding
- NSFC [21301103, 21077062, 61225018, 51272084, 21105053]
- 47th Scientific Research Foundation
- Taishan Scholarship
- Shandong Natural Science Foundation [ZR2012FZ007, ZR2012EML08]
- Shandong Province High Education Research and Development Program [J13LA08]
- Qingdao Municipal Science and Technology Commission [12-1-4-3-(27)-jch]
- NSF [CHE-1338346]
- 3M Faculty Award
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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%.
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