Facile synthesis of graphene sheets from fluorinated graphite
Facile synthesis of graphene sheets from fluorinated graphite
复制标题
从氟化石墨轻松合成石墨烯片
DOI：
10.1039/c5ra00910c
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Feng, Huixia
中科院分区：
文献类型：
--
作者：
Chen, Li;Lei, Jiaojiao;Feng, Huixia
通过氧化和还原将石墨化学剥离为石墨烯的问题之一是石墨的过度氧化和氧化石墨烯的不完全还原，这会在石墨烯片中引入许多缺陷和不必要的含氧基团。因此，通过化学剥离难以大规模制造缺陷少的高质量石墨烯片。本文开发了一种简单方便的方法，通过在水合肼中超声处理氟化石墨来制备含少量氟的石墨烯。为了进行比较，还通过 Hummers 法制备了还原氧化石墨烯（RGO）。结果表明，由氟化石墨制备的薄而扁平的石墨烯具有单晶结构，而RGO呈现乱层堆叠。此外，所制备的石墨烯片（GS）的热稳定性和电导率远高于RGO片。
One of the problems with the chemical exfoliation of graphite to graphene via oxidation and reduction, is the excessive oxidation of graphite and incomplete reduction of graphene oxide, which introduce many defects and unnecessary oxygen-containing groups into the graphene sheets. Therefore, it is difficult to create high quality graphene sheets with few defects on a large scale by chemical exfoliation. Here, a simple and convenient method is developed to prepare graphene with a little fluorine by ultrasonicating fluorinated graphite in hydrazine hydrate. For comparison, reduced graphene oxide (RGO) was also prepared by Hummers method. The results showed that thin and flat graphene prepared from fluorinated graphite has a monocrystalline structure, while RGO presents turbostratic stacking. Moreover, the thermal stability and electrical conductivity of the as-prepared graphene sheets (GS) are much higher than those of the RGO sheets.