Beijing Key Laboratory for Powder Technology Research and Development, Beijing University of Aeronautics and Astronautics, Haidian District, Beijing, People's Republic of China.
Nanotechnology. 2011 Sep 7;22(36):365306. doi: 10.1088/0957-4484/22/36/365306. Epub 2011 Aug 16.
Despite its bright prospects, graphene faces challenges including issues concerning mass production. Here we present a totally green approach whereby common crystal graphite can be exfoliated into graphene sheets in aqueous solution by jet cavitation. This is possible mainly because the tensile stress caused by graphite-solution interfacial reflection of compressive waves acts an intensive 'suction disk' on the graphite flakes. We confirm the presence of graphene sheets by diverse characterizations. The graphene yield by our method is estimated as ∼ 4 wt%, which could potentially be improved by further processing. The method, of a mechanical nature, is powerful compared to the traditional low-throughput micromechanical cleavage. Our work here illustrates jet cavitation as a facile, low cost, timesaving and laborsaving route, which can potentially be scaled up to mass production of graphene.
尽管前景光明，但石墨烯面临着包括大规模生产问题在内的挑战。在这里，我们提出了一种完全绿色的方法，即通过射流空化作用将普通的晶体石墨在水溶液中剥离成石墨烯片。这主要是因为石墨-溶液界面反射压缩波引起的拉伸应力对石墨片产生强烈的“吸盘”作用。我们通过多种特性确认了石墨烯片的存在。我们方法得到的石墨烯产率约为 4wt%，通过进一步处理，其产量有可能进一步提高。与传统的低通量微机械劈裂相比，这种机械性质的方法更加强大。我们的工作表明射流空化是一种简便、低成本、省时省力的途径，有可能大规模生产石墨烯。
