Design of three-dimensional macroporous reduced graphene oxide–Fe3O4 nanocomposites for the removal of Cr(VI) from wastewater

Three-dimensional macroporous reduced graphene oxide–Fe 3 O 4 nanocomposites (3D macroporous rGO–Fe 3 O 4 nanocomposites) were synthesized through electrostatic self-assembly method. The morphology and structure characteristics of 3D macroporous rGO–Fe 3 O 4 nanocomposites were studied in detail. Th...

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Bibliographic Details
Published in:Journal of porous materials 2019-02, Vol.26 (1), p.109-119
Main Authors: Liu, Yurong, Zhang, Zongqiang, Sun, Xiangwei, Wang, Tianyu
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Catalysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Graphene
Iron oxides
Morphology
Nanocomposites
Physical Chemistry
Self-assembly
Structural hierarchy
Wastewater treatment
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Summary:Three-dimensional macroporous reduced graphene oxide–Fe 3 O 4 nanocomposites (3D macroporous rGO–Fe 3 O 4 nanocomposites) were synthesized through electrostatic self-assembly method. The morphology and structure characteristics of 3D macroporous rGO–Fe 3 O 4 nanocomposites were studied in detail. Then 3D macroporous rGO–Fe 3 O 4 nanocomposites were used as adsorbents for the removal of Cr(VI) from wastewater. The effects of contact time and solution pH on the adsorption properties of 3D macroporous rGO–Fe 3 O 4 nanocomposites were also investigated. Due to the hierarchical porous structure, high surface area and large pore volume, 3D macroporous rGO–Fe 3 O 4 nanocomposite adsorbents exhibited excellent adsorption capability and rapid adsorption rates for Cr(VI) from aqueous solution. The kinetic and isothermal studies suggested that the adsorption process could be best described by pseudo-second-order kinetic model and Langmuir isotherm model, respectively. Moreover, the adsorbents could be separated easily by an external magnetic field for reusability, demonstrating great potential for the treatment of wastewater containing Cr(VI) during practical applications.
ISSN:1380-2224
1573-4854
DOI:10.1007/s10934-018-0624-1