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Efficient Fractionation of Graphene Oxide Based on Reversible Adsorption of Polymer and Size-Dependent Sodium Ion Storage.

07:00 EST 24th December 2018 | BioPortfolio

Summary of "Efficient Fractionation of Graphene Oxide Based on Reversible Adsorption of Polymer and Size-Dependent Sodium Ion Storage."

Graphene oxide (GO) is not only a uniqe class of two-dimensional materials but also an important precursor for scalable preparation of graphene. The efficient size fractionation of graphene oxide is of great importance to the fundamental and applied studies of chemically modified graphene, however, remains a great challenge. Herein we report an efficient and scalable fractionation method of GO employing reversible adsorption/desorption of temperatue-responsive poly(N-isopropylacrylamide) on GO to amplify their mass difference and significantly improve the fractionation efficiency. Furthermore, size-dependent sodium ion storage of the resulting fractionated reduced GO is revealed for the first time with high sodium-storage performance achieved for the smallest reduced GO due to its largest d-spacing and most defect sites. This work provides valuable insights to the size fractionation and size-dependent electrochemical performance of graphene, which can be potentially extended to other two-dimensional materials.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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