Gram-scale production of graphene based on solvothermal synthesis and sonication
Gram-scale production of graphene based on solvothermal synthesis and sonication
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DOI：
10.1038/nnano.2008.365
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发表时间：
2009-01-01
影响因子：
38.3
通讯作者：
Stride, John A.
中科院分区：
文献类型：
--
作者：
Choucair, Mohammad;Thordarson, Pall;Stride, John A.
碳纳米结构已经成为广泛应用的可能候选者，推动了对新型合成技术的研究，以生产纳米管，石墨烯和其他碳基材料。已经通过微机械裂解从块状石墨中分离出少量的原始石墨烯的单片（1），并且已经通过许多方法生产了更大量的化学改性的石墨烯片（2-7）。这两种技术都使用高度定向的热解石墨作为起始材料，并涉及劳动密集型制备。在这里，我们报告了直接化学合成的碳纳米片在克级的数量在一个自下而上的方法的基础上，常见的实验室试剂乙醇和钠，这是反应，得到一个中间体固体，然后热解，产生一个融合的石墨烯片阵列，分散通过温和的超声处理。用可扩展的低成本方法从非石墨前体生产大块石墨烯样品的能力应该使我们更接近石墨烯的实际应用。
Carbon nanostructures have emerged as likely candidates for a wide range of applications, driving research into novel synthetic techniques to produce nanotubes, graphene and other carbon-based materials. Single sheets of pristine graphene have been isolated from bulk graphite in small amounts by micromechanical cleavage(1), and larger amounts of chemically modified graphene sheets have been produced by a number of approaches(2-7). Both of these techniques make use of highly oriented pyrolitic graphite as a starting material and involve labour-intensive preparations. Here, we report the direct chemical synthesis of carbon nanosheets in gram-scale quantities in a bottom-up approach based on the common laboratory reagents ethanol and sodium, which are reacted to give an intermediate solid that is then pyrolized, yielding a fused array of graphene sheets that are dispersed by mild sonication. The ability to produce bulk graphene samples from nongraphitic precursors with a scalable, low-cost approach should take us a step closer to real-world applications of graphene.