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Issue 42, 2016
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Facile preparation of NiCo2O4@rGO composites for the removal of uranium ions from aqueous solutions

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Abstract

A hierarchical structure of NiCo2O4@rGO composite has been fabricated, with its structure and morphology well characterized by XRD, TEM, XPS and BET. The results proved that the NiCo2O4 nanosheets grow uniformly on both sides of the graphene sheets. In batch adsorption experiments, the effects of equilibrium time, pH and temperature on uranium(VI) adsorption were investigated. The main results show that the NiCo2O4@rGO composite has a higher affinity towards the uptake of uranium(VI) from aqueous solutions. The highest adsorption capacity reached 342.4 mg U gāˆ’1 at pH 5.0. Kinetic analysis shows that the adsorption process is described best by a pseudo-second-order kinetic model. The uranium(VI) sorption equilibrium data correlates well with the Langmuir sorption isotherm model in the thermodynamic analysis. Thus, NiCo2O4@rGO composite is an excellent adsorbent for removing uranium(VI) ions.

Graphical abstract: Facile preparation of NiCo2O4@rGO composites for the removal of uranium ions from aqueous solutions

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Publication details

The article was received on 18 Aug 2016, accepted on 20 Sep 2016 and first published on 21 Sep 2016


Article type: Paper
DOI: 10.1039/C6DT03261C
Citation: Dalton Trans., 2016,45, 16931-16937
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    Facile preparation of NiCo2O4@rGO composites for the removal of uranium ions from aqueous solutions

    X. Song, L. Tan, X. Sun, H. Ma, L. Zhu, X. Yi, Q. Dong and J. Gao, Dalton Trans., 2016, 45, 16931
    DOI: 10.1039/C6DT03261C

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