Designed nitrogen doping of few-layer graphene functionalized by selective oxygenic groups.
Designed nitrogen doping of few-layer graphene functionalized by selective oxygenic groups.
复制标题
选择性含氧基团功能化的少层石墨烯的氮掺杂设计
DOI：
10.1186/1556-276x-9-646
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发表时间：
2014
影响因子：
--
通讯作者：
Wu Y
中科院分区：
文献类型：
--
作者：
Chen Y;Xie B;Ren Y;Yu M;Qu Y;Xie T;Zhang Y;Wu Y
以氧化石墨烯为原料，通过选择性的含氧官能团（羟基、羰基、羧基等）进行功能化，合成了少层氮掺杂石墨烯。在热液条件下，分别。透射电子显微镜（TEM）和原子力显微镜（AFM）观察证实了氧化石墨烯的少层特征。X射线衍射（XRD）图谱证实了氧化石墨烯和还原氧化石墨烯的相结构。利用X射线光电子能谱（XPS）对石墨烯的氮掺杂量和成键构型进行了测定，结果表明不同含氧官能团对氮掺杂过程的影响存在明显差异。与其他含氧基团相比，羧基在氮掺杂的初期起着关键作用，而羟基在反应后期对氮掺杂过程的贡献更为明显。类石墨氮物质的形成由所涉及的含氧基团（例如，-COOH、-OH、C-O-C等）。研究了氮在石墨烯中的掺杂机理。本文的研究不仅有助于对石墨烯氮掺杂的基本认识，而且有助于开发具有设计表面功能化的新型石墨烯基器件。
Few-layer nitrogen doped graphene was synthesized originating from graphene oxide functionalized by selective oxygenic functional groups (hydroxyl, carbonyl, carboxyl etc.) under hydrothermal conditions, respectively. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) observation evidenced few-layer feature of the graphene oxide. X-ray diffraction (XRD) pattern confirmed phase structure of the graphene oxide and reduced graphene oxide. Nitrogen doping content and bonding configuration of the graphene was determined by X-ray photoelectron spectroscopy (XPS), which indicated that different oxygenic functional groups were evidently different in affecting the nitrogen doping process. Compared with other oxygenic groups, carboxyl group played a crucial role in the initial stage of nitrogen doping while hydroxyls exhibited more evident contribution to the doping process in the late stage of the reaction. Formation of graphitic-like nitrogen species was controlled by a synergistic effect of the involved oxygenic groups (e.g., -COOH, -OH, C-O-C, etc.). The doping mechanism of nitrogen in the graphene was scrutinized. The research in this work may not only contribute to the fundamental understandings of nitrogen doping within graphene but promote the development of producing novel graphene-based devices with designed surface functionalization.