微波固相法快速制备氮掺杂石墨烯

以鳞片石墨为原料, 首先通过Hummers法制备氧化石墨, 再将洗涤至中性的氧化石墨分散液与乙二胺反应得到功能化石墨烯。干燥后的功能化石墨烯在微波辐照下能瞬间产生高热, 促使接枝的乙二胺分子分解并实现对石墨烯原位掺杂制备出氮掺杂石墨烯。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)、X射线衍射(XRD)、X射线能谱(EDS)对样品的形貌、结构和组成进行了表征。结果表明:该合成途径能成功实现对氧化石墨烯的还原和掺杂, 所合成的氮掺杂石墨烯呈现透明绢丝状结构。

Preparation of Nitrogen-Doped Graphene with Solid Microwave Method

Graphite oxide was synthesized via Hummers method with flake graphite as raw material. After centrifugation and washing to clean out the remnant slat, ethylenediamine (EDA) was added into the dispersion to react with graphene oxides giving rise to functional graphene sheets (FGS). The dried FGS can interact with microwaves strongly, producing superheating which results in decomposing the grafted EDA molecules and in-situ doping graphene sheets. The morphology, structure, and components of the as-produced graphene were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), energy dispersion spectrum (EDS). The results showed that nitrogen-doped graphene sheets (NGS) can be successfully synthesized via this strategy. The synthesized nitrogen-doped graphene was transparent.