Graphene is an unconventional material with a two-dimensional hexagonal crystalline array of elemental carbon atoms and outstanding properties; accordingly, a desirable objective in the line of research of graphene is the development of novel and more productive methods of synthesis, validating its properties and applications. In our exploratory research, we have effectively exfoliated graphene from graphite using supercritical fluids (water, ethanol and carbon dioxide). The exfoliated graphene was properly characterized; via scanning electron microscopy, the morphology of graphene was observed; Raman spectra confirmed the exfoliation of graphene depicting the characteristic shift towards smaller Raman number in the 2D band (2676 cm⁻¹) compared to that of graphite (≈ 2700 cm⁻¹); transmission electron microscopy analysis exhibited the crystalline structure of graphene attesting also the expected transparency of exfoliated layers. Graphene exfoliation from graphite by supercritical fluids promises to be a simple large-scale method for graphene production.

石墨烯是一种非常规材料，具有元素碳原子的二维六边形晶体阵列和出色的性能。因此，石墨烯研究领域的一个理想目标是开发新颖，生产效率更高的合成方法，从而验证其性质和应用。在我们的探索性研究中，我们已经使用超临界流体（水，乙醇和二氧化碳）从石墨中有效地剥离了石墨烯。剥落的石墨烯已得到适当表征。通过扫描电子显微镜观察石墨烯的形态。拉曼光谱确认石墨烯描绘在2D带朝着更小的拉曼数特性偏移的剥离（2676厘米^-1相比，石墨（≈2700厘米的）^-1）; 透射电子显微镜分析显示出石墨烯的晶体结构，也证明了剥离层的预期透明度。用超临界流体从石墨中剥离石墨烯有望成为一种简单的大规模生产石墨烯的方法。