Investigation of the Surface Properties of Graphene Oxide and Graphene by Inverse Gas Chromatography
Investigation of the Surface Properties of Graphene Oxide and Graphene by Inverse Gas Chromatography
复制标题
DOI：
10.1007/s10337-013-2597-1
复制
发表时间：
2014-02
期刊：
影响因子：
1.7
通讯作者：
Jinfeng Dai;Guojian Wang;Cheng-Ken Wu
中科院分区：
文献类型：
--
作者：
Jinfeng Dai;Guojian Wang;Cheng-Ken Wu
氧化石墨烯（GO）和石墨烯（rGO）的表面性质已经研究了第一次使用反气相色谱在无限稀释。分别采用Hummers法和化学还原法制备了GO和rGO，并采用FT-IR、XDR、XPS、SEM和TEM对GO和rGO的结构进行了表征。在313.15 K时，它们的色散表面能、极性表面能和总表面能分别为28.5、18.0、46.5 mJ m− 2和98.3、6.60、104.9 mJ m− 2。结果表明，这些样品的表面性质不同，由于它们的结构（含氧官能团的存在，缺陷）。通过参考经验关系来建立各种样品的供体（KD）和受体（KA）相互作用参数，可以可靠地识别表面的刘易斯酸碱特性。结果表明，GO是基于路易斯的材料，而rGO倾向于是两性的，但也是基于路易斯的材料。对石墨烯表面性质的评价可以指导石墨烯基纳米复合材料的加工和应用。
The surface properties of graphene oxide (GO) and graphene (rGO) have been investigated for the first time using inverse gas chromatography at infinite dilution. The GO and rGO were prepared by classical Hummers method and chemical reduction method, respectively, and their structures were characterized using FT-IR, XDR, XPS, SEM, and TEM. It is found that their dispersive (), polar (), and total () surface energies were 28.5, 18.0, 46.5 mJ m−2and 98.3, 6.60, 104.9 mJ m−2at 313.15 K, respectively. The results indicate that these samples differ in their surface properties, due to their structure (existence of oxygen-containing functional groups, of defects). By referencing the empirical relationship to establishing the donor (KD) and acceptor (KA) interaction parameters of the various samples, the Lewis acid–base character of the surface can be reliably identified. As a result, it is revealed that GO is a Lewis-base material, whereas rGO tends to be amphoteric but is also a Lewis-base material. Evaluation of surface properties of graphene could be used to guide the processing and application in graphene-based nanocomposites in the future.