Formation of 3D graphene foams on soft templated metal monoliths.
Formation of 3D graphene foams on soft templated metal monoliths.
复制标题
DOI：
10.1039/c6nr02455f
复制
发表时间：
2016-07
期刊：
影响因子：
6.7
通讯作者：
M. Tynan;David W. Johnson;Ben P. Dobson;K. S. Coleman
中科院分区：
文献类型：
--
作者：
M. Tynan;David W. Johnson;Ben P. Dobson;K. S. Coleman
石墨烯泡沫是聚合物热固性、过滤/污染控制的框架，并利用石墨烯的高导电性和泡沫的多孔结构用作储能设备的电极材料，是领先的竞争者。在这里，我们演示了一种以葡聚糖/金属盐凝胶为模板的大孔3D石墨烯材料的简单合成，其中金属是钴、镍、铜和铁。在甲烷化学气相沉积(CVD)之前，凝胶被退火以形成金属氧化物泡沫。电子显微镜(扫描电子显微镜和透射电子显微镜)和拉曼光谱表明，钴金属凝胶提供了最高质量的材料。
Graphene foams are leading contenders as frameworks for polymer thermosets, filtration/pollution control and for use as an electrode material in energy storage devices, taking advantage of graphene's high electrical conductivity and the porous structure of the foam. Here we demonstrate a simple synthesis of a macroporous 3D graphene material templated from a dextran/metal salt gel, where the metal was cobalt, nickel, copper, and iron. The gel was annealed to form a metal oxide foam prior to a methane chemical vapour deposition (CVD). Cobalt metal gels were shown to afford the highest quality material as determined by electron microscopy (SEM and TEM) and Raman spectroscopy.