Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 99, Issue -, Pages 15-22Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.05.007
Keywords
Nanocomposites; Polymers; Magnetic properties; Synergism
Categories
Funding
- National Natural Science Foundation of China [21174059, 21374046]
- Program for Changjiang Scholars and Innovative Research Team in University
- Testing Foundation of Nanjing University
- Open Project of State Key Laboratory of Superamolecular Structure and Materials [SKLSSM201416]
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Novel hybrid nanocomposites constructed via anchoring the Fe3O4@polypyrrole nanospheres with hierarchical porous structure on graphene nanosheets (graphene/Fe3O4@polypyrrole, GFP) have been prepared, and characterized by using TEM, XRD, XPS, FT-IR and TGA. The large saturation magnetization of 12.4 emu g(-1), allows fast and economic separation of the GFP from solution. Due to the synergic effect between graphene and Fe3O4@polypyrrole, the GFP exhibits excellent adsorption capability of 348.4 mg g(-1) for Cr(VI) removal, which is much higher than the previously reported values of other magnetic nanomaterials. Furthermore, the GFP is stable and recyclable, retaining about 72.2% of the removal efficiency after six adsorption-desorption cycles. The adsorption isotherms and kinetics could be well simulated by the Langmuir and pseudo-second-order models respectively. The GFP nanocomposites could be a good candidate for efficient Cr(VI) removal from the wastewater. (C) 2014 Elsevier Ltd. All rights reserved.
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