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Controllable and green synthesis of robust graphene aerogels with tunable surface properties for oil and dyes adsorption

Abstract

Recently, graphene aerogel (GA) with abundant pore structure, ultra-light density and excellent adsorption capacity has been regarded as a promising high efficiency oil/water and dyes/water separation material and attracted much attention in water remediation. However, the green and controllable synthesis of GA with tunable surface property and high mechanical strength remain a challenge. In this work, we develop a facile hydrothermal method with vitamin C (VC) as green reducing agent. It is found that VC ensures the high mechanical strength while surface hydrophobicity can be facilely controlled with different pH values. The hydrophobic and robust GA obtained at pH 5 performs outstanding oil-water separation capability in both non-turbulent and turbulent oil-water mixtures under a continuous adsorption, whereas the hydrophilic GA obtained at pH 11 shows excellent dye-water separation performance. This artificial controllable strategy for modification of GA with expected properties paves a promising way for expending GA with various applications.

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Publication details

The article was received on 03 Sep 2017, accepted on 01 Dec 2017 and first published on 04 Dec 2017


Article type: Paper
DOI: 10.1039/C7NJ03329J
Citation: New J. Chem., 2017, Accepted Manuscript
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    Controllable and green synthesis of robust graphene aerogels with tunable surface properties for oil and dyes adsorption

    L. Qiu, W. Wan, Z. Tong, R. Zhang, L. Li and Y. Zhou, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03329J

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