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The behavior of graphene oxide trapped at the air water interface
Advances in Colloid and Interface Science ( IF 15.9 ) Pub Date : 2020-11-02 , DOI: 10.1016/j.cis.2020.102312
David López-Diaz , M. Dolores Merchán , M. Mercedes Velázquez

Graphene oxide is a derivate of graphene obtained by oxidation of graphite and other carbonaceous materials. The more accepted structure consists in carbonyl and carboxyl groups located at the edge of the graphene network and hydroxyl and epoxy groups attached to the basal plane. The percentage of O-groups depends on the synthesis route and the material used as carbon source. In addition, highly oxidized fragments, called oxidative debris, OD, are produced during the oxidation process. These fragments are adsorbed onto the graphene oxide network and can be removed by alkaline washing. The purified material has lower O/C ratio than graphene oxide and its properties are also quite different. Due to its structure, graphene oxide can be adsorbed at the air-water interface of the aqueous solution by diffusion, Gibbs monolayers, or by spreading on a clean water subphase resulting in a Langmuir film. This review is intended to provide information on the importance of controlling the chemical composition, structure, size, and oxidative debris, on the manufacture of graphene oxide films. To this end the review shows the influence of the synthesis route and the starting material on the structure of graphene oxide and analyzes several examples of the behavior and properties of films prepared with different types of graphene oxides. The great variability of behaviors of graphene oxide films caused by the different structure of this material provides a great opportunity to fine-tune the properties of films according to the needs of different applications.



中文翻译:

空气水界面处捕获的氧化石墨烯的行为

氧化石墨烯是通过石墨和其他碳质材料的氧化获得的石墨烯的衍生物。更为可接受的结构是位于石墨烯网络边缘的羰基和羧基以及与基面相连的羟基和环氧基。O-基团的百分比取决于合成路线和用作碳源的材料。此外,在氧化过程中会产生高度氧化的碎片,称为氧化碎片OD。这些碎片被吸附到氧化石墨烯网络上,可以通过碱洗除去。纯化的材料具有比氧化石墨烯低的O / C比,并且其性能也有很大不同。由于其结构,氧化石墨烯可以通过扩散,吉布斯单层,或在干净的水子相上铺展,形成Langmuir膜。这篇综述旨在提供有关控制氧化石墨烯薄膜制造中化学成分,结构,尺寸和氧化性碎屑的重要性的信息。为此,本综述显示了合成路线和起始原料对氧化石墨烯结构的影响,并分析了用不同类型的氧化石墨烯制备的薄膜的行为和性能的几个实例。由这种材料的不同结构引起的氧化石墨烯薄膜行为的巨大变化为根据不同应用的需求微调薄膜的性能提供了很大的机会。这篇综述旨在提供有关控制氧化石墨烯薄膜制造中化学成分,结构,尺寸和氧化性碎屑的重要性的信息。为此,本综述显示了合成路线和起始原料对氧化石墨烯结构的影响,并分析了用不同类型的氧化石墨烯制备的薄膜的行为和性能的几个实例。由这种材料的不同结构引起的氧化石墨烯薄膜行为的巨大变化为根据不同应用的需求微调薄膜的性能提供了很大的机会。这篇综述旨在提供有关控制氧化石墨烯薄膜制造中化学成分,结构,尺寸和氧化性碎屑的重要性的信息。为此,本综述显示了合成路线和起始原料对氧化石墨烯结构的影响,并分析了用不同类型的氧化石墨烯制备的薄膜的行为和性能的几个实例。由这种材料的不同结构引起的氧化石墨烯薄膜行为的巨大变化为根据不同应用的需求微调薄膜的性能提供了很大的机会。为此,本综述显示了合成路线和起始原料对氧化石墨烯结构的影响,并分析了用不同类型的氧化石墨烯制备的薄膜的行为和性能的几个实例。由这种材料的不同结构引起的氧化石墨烯薄膜行为的巨大变化为根据不同应用的需求微调薄膜的性能提供了很大的机会。为此,本综述显示了合成路线和起始原料对氧化石墨烯结构的影响,并分析了用不同类型的氧化石墨烯制备的薄膜的行为和性能的几个实例。由这种材料的不同结构引起的氧化石墨烯薄膜行为的巨大变化为根据不同应用的需求微调薄膜的性能提供了很大的机会。

更新日期:2020-11-09
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