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202204005.pdf
文章编号： 1672-6987（2022）04-0033-08； DOI： 10.16351/j.1672-6987.2022.04.005
刘克， 段咏欣*（青岛科技大学 高分子科学与工程学院，山东 青岛 266042）
摘要： 基于石墨烯制备产率低、水分散性差，而高产率的氧化石墨烯又因为氧化导致丧失导电性的问题，在此通过对石墨进行先膨胀后微氧化的预处理，球磨制备了高产率、高浓度、高导电的低氧化度石墨烯（LGE）。所制备LGE分散液的浓度高达12 mg·mL-1，远高于常规石墨烯或氧化石墨烯分散液的浓度，并通过zeta电位证实LGE在水中具有良好的分散性。通过X-射线光电子能谱、热重分析和紫外光谱证实所制备LGE具有较完整的共轭结构和较低的含氧量。由于结构完整、含氧官能团少，所制备的LGE薄膜的电导率最高可达5 000 S·m-1，远远优越于氧化石墨烯。通过原子力显微镜看出LGE的横向尺寸在几微米至十几微米之间，并且厚度尺寸介于石墨烯和氧化石墨烯之间。
关键词： 低氧化度石墨烯； 分散性； 球磨法； 导电性
中图分类号： TQ 207+.2文献标志码： A
引用格式： 刘克， 段咏欣. 低氧化度石墨烯的制备及表征［J］. 青岛科技大学学报(自然科学版), 2022, 43(4): 33-40.
LIU Ke, DUAN Yongxin. Preparation and characterization of low-oxidized graphene［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（4）： 33-40.
Preparation and Characterization of Low-oxidized Graphene
LIU Ke, DUAN Yongxin
(College of Polymer Science and Engineering, Qingdao University of Science and Technology， Qingdao 266042， China)
Abstract: Based on the fact that graphene has low yields and poor water dispersion and graphene oxide which can be produced in high yields, loses the conductivity because of oxidation. Herein, we prepared high-yield, high-concentration and high-conductivity low-oxidized graphene (LGE) by combining pre-treatment of graphite expansion, micro-oxidation and ball milling. The concentration of the as-prepared LGE dispersion is as high as 12 mg·mL-1, which is much higher than that of conventional graphene or graphene oxide dispersions. And the zeta potential investigation proved that LGE has good dispersibility in water. Compared to conventional graphene oxide, the as-prepared LGE has a more complete conjugated structure and lower oxygen content, which is confirmed by X-ray photoelectron spectrum, thermogravimetric analysis and UV-vis. Due to the more complete structure and fewer oxygen-containing functional groups, the conductivity of the prepared LGE film can reach 5 000 S·m-1, which is far superior graphene oxide. It can be seen from atomic force microscope that the lateral dimension of LGE is between a few microns to ten microns, and the thickness is between graphene and graphene oxide.
Key words: low-oxidized graphene; dispersibility; ball milling; conductivity
收稿日期： 2021-06-27
基金项目： 国家自然科学基金项目(51773103).
作者简介： 刘克(1995—),男,硕士研究生.*通信联系人.
