Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic.
Nanoscale. 2015 Aug 28;7(32):13646-55. doi: 10.1039/c5nr03243a. Epub 2015 Jul 27.
The availability of well-defined modified graphene derivatives such as fluorographene, graphane, thiographene or hydroxygraphene is of pivotal importance for tuning the resulting material properties in numerous potential applications. A series of fluorinated graphene with various contents of fluorine was synthesized by a simple fluorination procedure in an autoclave with a nitrogen/fluorine atmosphere at different exposure times and temperatures. To investigate the composition, structure and properties all samples were characterized in detail by a number of analytical techniques such as SEM, XRD, EDS, AFM, STEM, combustible elemental analysis, STA, XPS, Raman spectroscopy, UV-VIS spectroscopy and cyclic voltammetry. The fully fluorinated graphene with the overall stoichiometry C1F1.05 had a bright white color indicating a significant change of band-gap. In comparison to other samples such a high concentration of fluorine led to the occurrence of exotic thermal behavior, strong luminescence in the visible spectral region and also the unique super-hydrophobic behavior observed on the material surface. The described tunable fluorination should pave the way to fluorographene based devices with tailored properties.
具有明确结构的改性石墨烯衍生物（如氟化石墨烯、石墨烷、噻吩或羟基石墨烯）的可用性对于调整许多潜在应用中所得材料的性能至关重要。通过在高压釜中使用氮气/氟气气氛在不同的暴露时间和温度下进行简单的氟化程序，合成了一系列具有不同氟含量的氟化石墨烯。为了研究组成、结构和性能，所有样品均通过多种分析技术（如 SEM、XRD、EDS、AFM、STEM、可燃元素分析、STA、XPS、拉曼光谱、UV-VIS 光谱和循环伏安法）进行了详细表征。具有整体化学计量比 C1F1.05 的全氟化石墨烯具有亮白色，表明带隙发生了显著变化。与其他样品相比，如此高浓度的氟导致了奇特的热行为、可见光区域的强发光以及在材料表面观察到的独特超疏水性行为的发生。所描述的可调氟化为基于氟代石墨烯的具有定制性能的器件铺平了道路。
