ABSTRACT

Up to date, various methods of graphene production have been rapidly developed for a range of applications. However, large-scale production with low cost is still desired. The chemical exfoliation route is expected to be the best alternative although there are still many aspects that can be further improved, for example, raw materials. Instead of using graphite, bituminous coal is a better candidate to be used as the raw material for synthesizing graphene because it is cheap and abundant. Moreover, the use of coal is only limited to the electricity purpose. In this study, a new chemical exfoliation method followed by thermal reduction was explored to fabricate graphene from bituminous coal. This method involves ultrasonication-assisted emulsion formation for separation to remove the remaining residual coal. As a result, 0.9 wt% of bituminous coal could be exfoliated with graphene. Based on several characterization techniques, coal-derived graphene produced from this integrated method has competitive qualities compared to graphite-derived graphene.

摘要

迄今为止，各种石墨烯生产方法已迅速开发用于一系列应用。然而，仍然需要低成本的大规模生产。化学剥离路线有望成为最佳替代方案，尽管仍有许多方面可以进一步改进，例如原材料。与使用石墨相比，烟煤更适合用作合成石墨烯的原料，因为它便宜且丰富。此外，煤炭的使用仅限于电力用途。在这项研究中，探索了一种新的化学剥离方法，然后是热还原，以从烟煤中制造石墨烯。该方法涉及超声辅助乳化形成分离以去除剩余的残余煤。结果，0。9 wt% 的烟煤可以用石墨烯剥离。基于多种表征技术，与石墨衍生石墨烯相比，由这种综合方法生产的煤衍生石墨烯具有竞争力。