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Title: Graphene nanosheets decorated with tunable magnetic nanoparticles and their efficiency of wastewater treatment

Highlights: • Magnetic graphene/Fe{sub 3}O{sub 4} nanocomposites were synthesized by a facile and fast one-pot method. • The sizes of Fe{sub 3}O{sub 4} nanocrystals can be controlled by the weight ratio of GO to Fe{sub 3}O{sub 4}. • The graphene/Fe{sub 3}O{sub 4} hybrid structures are highly efficient in purification of wastewater. • The decline in efficiencies of graphene/Fe{sub 3}O{sub 4} is not more than 1.5% after five cycling runs. - Abstract: Magnetic graphene–Fe{sub 3}O{sub 4} nanocomposites (G/Fe{sub 3}O{sub 4}) were fabricated by a facile and fast one-pot method and used as adsorbent to remove dye for wastewater using Rhodamine B as the adsorbate. Samples with different weight ratios of graphene oxide (GO) to Fe{sub 3}O{sub 4} were prepared. The transmission electron microscopy results exhibit that the sizes of Fe{sub 3}O{sub 4} nanocrystals decrease with the increasing of weight ratio of GO to Fe{sub 3}O{sub 4}. The magnetic characterization demonstrates that the saturation magnetization of nanocomposites decreases with the decreasing sizes of Fe{sub 3}O{sub 4} nanocrystals. The investigation of adsorption kinetics and isotherm indicates the adsorption process can be described by Langmuir model and nanocomposites with the smaller sizes of Fe{sub 3}O{sub 4} nanoparticles show better adsorption ability. Furthermore, the adsorbentsmore » could be recovered conveniently by magnetic separation and recyclable used after desorption process, and the decline in efficiencies of all samples is not more than 1.5% after five cycling runs.« less
Authors:
 [1] ;  [2] ; ; ; ; ; ;  [1] ;  [1]
  1. Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012 (China)
  2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 (China)
Publication Date:
OSTI Identifier:
22475850
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 68; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ADSORPTION; DESORPTION; DYES; FERRITES; GRAPHENE; IRON OXIDES; MAGNETIZATION; NANOCOMPOSITES; NANOPARTICLES; NANOSTRUCTURES; PURIFICATION; SATURATION; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; WASTE WATER; WATER TREATMENT