Mussel-inspired, ultralight, multifunctional 3D nitrogen-doped graphene aerogel
Mussel-inspired, ultralight, multifunctional 3D nitrogen-doped graphene aerogel
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受贻贝启发的超轻多功能 3D 氮掺杂石墨烯气凝胶
DOI：
10.1016/j.carbon.2014.08.054
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发表时间：
2014
期刊：
影响因子：
10.9
通讯作者：
Chen Xi
中科院分区：
文献类型：
--
作者：
Song Xinhong;Lin Liping;Rong Mingcong;Wang Yiru;Xie Zhaoxiong;Chen Xi
受海洋贻贝的启发，利用多巴胺（DA）开发了一种超轻、三维（3D）、氮掺杂的石墨烯气凝胶（NGA）。DA经过自聚合，可以使石墨烯表面功能化，并在热解时将氮原子嵌入石墨烯片上。采用扫描电镜、透射电镜、x射线光电子能谱和拉曼光谱对其形貌和织构性能进行了研究。通过调整前驱体混合物中氧化石墨烯和DA的用量，可以制备密度低至1.9 mg cm−3的NGA。合成的NGA是宏观组装的，机械稳定的，防火的。它具有非常高的吸附能力和高效的吸油空间利用，因此在海洋溢油或化学品泄漏回收中作为吸力撇油器得到了实际应用。NGA的高导电性和三维互连多孔结构使其作为电化学传感器电极材料具有良好的性能。
Inspired by marine mussel, an ultralight, three dimensional (3D), and nitrogen doped graphene aerogel (NGA) is developed by virtue of dopamine (DA). DA undergoes self-polymerization that can functionalize the graphene surface and also embeds nitrogen atoms onto the graphene sheets upon pyrolysis. The morphology and textural properties were investigated by scanning and transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectrum. By adjusting the amount of graphene oxide and DA in the precursor mixture, NGA with a density as low as 1.9 mg cm−3can be prepared. The resultant NGA is macroscopic-assembled, mechanically stable, and fire-resistant. It has very high adsorption capacity and efficient space utilization towards oil uptake, thereby prompting practical applications as a suction skimmer in marine oil spillage or chemical leakage recovery. The high conductivity and 3D interconnected porous structure of the NGA permit good performance as electrode material for electrochemical sensors.