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A Green Chemistry of Graphene: Photochemical Reduction towards Monolayer Graphene Sheets and the Role of Water Adlayers

Authors

  • Dr. Xin-Hao Li,

    Corresponding author
    1. Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Postdam (Germany), Fax: (+49) 331-567-9502
    • Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Postdam (Germany), Fax: (+49) 331-567-9502
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  • Prof. Dr. Jie-Sheng Chen,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (PR China)
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  • Prof. Dr. Xinchen Wang,

    1. Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Postdam (Germany), Fax: (+49) 331-567-9502
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  • Dr. Manfred E. Schuster,

    1. Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4–6, 14195 Berlin (Germany)
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  • Prof. Dr. Robert Schlögl,

    1. Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4–6, 14195 Berlin (Germany)
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  • Prof. Dr. Markus Antonietti

    1. Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Postdam (Germany), Fax: (+49) 331-567-9502
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Abstract

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Clean sheets: Stable aqueous dispersions of graphene sheets (GSs) are obtained by exposing graphene oxide to irradiation with light at room temperature, without using any chemical additives. The photochemical reduction method is sustainable and scalable, repairs a majority of defects in the graphene layers, and can be used to fine-tune surface functional groups. Interestingly, the aqueous GS dispersions are stable without any added surfactant. The existence of a water layer that is strongly bound to GS is evidenced.

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