Cellular graphene aerogel combines ultralow weight and high mechanical strength: A highly efficient reactor for catalytic hydrogenation.
Cellular graphene aerogel combines ultralow weight and high mechanical strength: A highly efficient reactor for catalytic hydrogenation.
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多孔石墨烯气凝胶结合了超轻重量和高机械强度：高效催化氢化反应器
DOI：
10.1038/srep25830
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发表时间：
2016-05-12
影响因子：
4.6
通讯作者：
Zhao N
中科院分区：
文献类型：
--
作者：
Zhang B;Zhang J;Sang X;Liu C;Luo T;Peng L;Han B;Tan X;Ma X;Wang D;Zhao N
三维石墨烯气凝胶（GAs）的构建具有重要意义，因为其具有优异的应用性能。到目前为止，GA的超轻重量和超机械强度的结合仍然是一个巨大的挑战。在这里，我们展示了通过一种简单，易于控制和通用的路线，即在温和条件下（70 °C）在油-水界面处化学还原氧化石墨烯组装体来制备细胞GA。GA是超轻的（密度<3 mg cm−3），但具有机械弹性，因为电池的壁以高度有序的方式紧密堆积，以最大限度地提高机械强度。GA具有吸油量大、催化活性高、产物分离容易、稳定性好等优点，已被广泛应用于催化加氢反应中。
The construction of three-dimensional graphene aerogels (GAs) is of great importance owing to their outstanding properties for various applications. Up to now, the combination of ultralow weight and super mechanical strength for GA remains a great challenge. Here we demonstrate the fabrication of cellular GAs by a facile, easily controlled and versatile route, i.e. the chemical reduction of graphene oxide assemblies at oil-water interface under a mild condition (70 °C). The GA is ultralight (with density <3 mg cm−3) yet mechanically resilient because the walls of the cell closely pack in a highly ordered manner to maximize mechanical strength. The GA has been utilized as an appealing reactor for catalytic hydrogenation, which exhibited great advantages such as large oil absorption capability, exceptional catalytic activity, ease of product separation and high stability.