Department of Chemistry and Center for Advanced 2D Materials, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
Chem Soc Rev. 2017 Nov 27;46(23):7306-7316. doi: 10.1039/c7cs00485k.
Graphene oxide (GO) can be considered as one of the most visible outcomes of graphene research in terms of large scale production and commercialization prospects. Although GO can be easily prepared by oxidation-exfoliation of graphite in agitated solutions, the size of these sheets is generally limited due to fragmentation along fault lines during chemical oxidation and exfoliation in agitated solutions. In this account, we discuss recent strategies which have been developed for the preparation of large sized graphene oxide (LGO) sheets with lateral sizes >10 μm, using chemically expanded graphite as the starting material. LGO has a much lower density of defects than GO prepared using the conventional Hummers' method and can be readily transformed into graphene by chemical reduction. In addition, the unique advantages of using LGO sheets as a performance enhancer are discussed. Finally, this review also discusses recent advances in the chemical and electrochemical reduction of graphene oxide.
氧化石墨烯（GO）可以被认为是在大规模生产和商业化前景方面，石墨烯研究最显著的成果之一。虽然通过在搅拌溶液中氧化-剥离石墨可以很容易地制备 GO，但由于在化学氧化和搅拌溶液中的剥离过程中沿位错线的断裂，这些薄片的尺寸通常受到限制。在本综述中，我们讨论了最近发展的使用化学膨胀石墨作为起始材料制备具有大于 10μm 的横向尺寸的大尺寸氧化石墨烯（LGO）薄片的策略。与使用传统的 Hummers 法制备的 GO 相比，LGO 的缺陷密度要低得多，并且可以很容易地通过化学还原转化为石墨烯。此外，还讨论了将 LGO 薄片用作性能增强剂的独特优势。最后，本综述还讨论了氧化石墨烯的化学和电化学还原的最新进展。
