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Updated: Apr 22, 2026

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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
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Optimization of proton conductivity in graphene oxide by filling sulfate ions
Kazuto Hatakeyama1, Mohammad Razaul Karim, Chikako Ogata
1Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan. yasumi@gpo.kumamoto-u.ac.jp Hayami@sci.kumamoto-u.ac.jp.
Abstract:
Graphene oxide (GO) walled channels filled by sulfate ions exhibit an optimized proton conductivity, which is higher than the proton conductivity of all other forms of GO. The sulphate ion increases the water absorbing capacity and hydrogen bond reformation process in GO.

