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Study on the structure of reduced graphene oxide prepared by different reduction methods

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Abstract

The reduced graphene oxide (rGO) has attracted more and more attention in recent years. How to choose a suitable reduction method to prepare rGO is a critical problem in the preparation of graphene composites. In this work, the differences of rGO reduced by thermal, microwave, Ultraviolet (UV) and reducing agent were studied. The reduction degree and functional groups of rGO were compared by SEM, XPS, Raman, FTIR and TGA. Thermal can remove most of the oxygen-containing groups of graphene oxide (GO) and the thermal reduction is the most effective reduction method. UV light can directly act on the unstable oxygen-containing groups, and its reduction efficiency is second only to thermal reduction. The efficiency of chemical reduction is not as good as that of UV reduction, because the reducing agent only act on the surface of GO. Microwave reduction is a mild thermal reduction with the lowest efficiency, but the residual oxygen-containing groups increase the hydrophilicity of rGO. To sum up, this work studies that rGO prepared by different reduction methods has different characteristics, which provides a reference for selecting appropriate reduction methods to prepare graphene composites with better properties.

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Acknowledgements

The authors greatly acknowledge the financial supports from the National Natural Science Foundation of China (NNSFC 21805022) and the Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201800709 and KJZD-K201800703).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing, 400074, People’s Republic of China

    Xu Xiang, Ying Zhu, Changqin Gao, Han Du & Chunwen Guo

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  1. Xu Xiang
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  2. Ying Zhu
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  3. Changqin Gao
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Xiang, X., Zhu, Y., Gao, C. et al. Study on the structure of reduced graphene oxide prepared by different reduction methods. Carbon Lett. 32, 557–566 (2022). https://doi.org/10.1007/s42823-021-00287-6

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  • DOI: https://doi.org/10.1007/s42823-021-00287-6

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