Liang Dong, Yan Ling, Huang Kunkun, Li Yan, Ai Fangfang, Zhang Hongmei, Jiang Zhengyi
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China.
State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, Liaoning, China.
Materials (Basel). 2021 Feb 17;14(4):944. doi: 10.3390/ma14040944.
The effects of the wet milling rotating speed on the number of graphene layers and graphene quality, and the conversion efficiency of graphite exfoliate to graphene, were investigated by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The results show that the number of few-layer graphene nanometer sheets (GNSs) (≤10 layers) gradually increases with the increase of rotational speed in the range of 160-240 rpm. The proportion of GNSs with 0-10 layers reaches more than 80% as the rotational speed is increased to 280 rpm. GNS defect types in the composite materials are marginal defects with minimal influence and almost no oxidation. In the range of 160-280 rpm, the intensity of graphite peak decreases and the conversion efficiency of graphene increases with the increase of rotational speed. This is the same as the experimental result obtained by HRTEM.
通过扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）、拉曼光谱、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）研究了湿磨转速对石墨烯层数和石墨烯质量以及石墨剥落转化为石墨烯的转化效率的影响。结果表明，在160 - 240 rpm范围内，少层石墨烯纳米片（GNSs）（≤10层）的数量随着转速的增加而逐渐增加。当转速增加到280 rpm时，0 - 10层的GNSs比例达到80%以上。复合材料中的GNS缺陷类型为影响极小且几乎无氧化的边缘缺陷。在160 - 280 rpm范围内，石墨峰强度随着转速的增加而降低，石墨烯的转化效率增加。这与HRTEM得到的实验结果一致。
