A General Approach to Direct Growth of Oriented Metal-Organic Framework Nanosheets on Reduced Graphene Oxides
A General Approach to Direct Growth of Oriented Metal-Organic Framework Nanosheets on Reduced Graphene Oxides
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在还原氧化石墨烯上直接生长定向金属有机框架纳米片的通用方法
DOI：
10.1002/advs.201901480
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发表时间：
2020
期刊：
影响因子：
15.1
通讯作者：
Yu Chengzhong
中科院分区：
文献类型：
--
作者：
Liu Chao;Huang Xiaodan;Liu Jizi;Wang Jing;Chen Zibin;Luo Rui;Wang Chaohai;Li Jiansheng;Wang Lianjun;Wan Jingjing;Yu Chengzhong
沉积在石墨烯上的超薄金属有机框架纳米片（UMOFN）是非常有吸引力的，然而，在石墨烯上直接生长具有受控取向的UMOFN仍然具有挑战性。在这里，报道了一种低浓度辅助的异质成核策略，用于在具有可控取向的还原氧化石墨烯（rGO）表面上直接生长UMOFN。这种一般策略可以应用于在rGO上构建各种UMOFN，包括Co-ZIF、Ni-ZIF、Co，Cu-ZIF和Co，Fe-ZIF。当UMOFN大部分垂直附着在rGO上时，形成了具有开孔结构和优异导电性的3D泡沫状分层结构（称为UMOFN @ rGO-F），显示出作为锂离子电池和析氧电极材料的优异性能。该研究为提高金属氧化物燃料电池在储能领域的电化学性能提供了一种新的思路。
Ultrathin metal–organic framework nanosheets (UMOFNs) deposited on graphene are highly attractive, however direct growth of UMOFNs on graphene with controlled orientations remains challenging. Here, a low‐concentration‐assisted heterogeneous nucleation strategy is reported for the direct growth of UMOFNs on reduced graphene oxides (rGO) surface with controllable orientations. This general strategy can be applied to construct various UMOFNs on rGO, including Co‐ZIF, Ni‐ZIF, Co, Cu‐ZIF and Co, Fe‐ZIF. When UMOFNs are mostly attached perpendicularly on rGO, a 3D foam‐like hierarchical architecture (named UMOFNs@rGO‐F) is formed with an open pore structure and excellent conductivity, showing excellent performance as electrode materials for Li‐ion batteries and oxygen evolution. The contribution has provided a strategy for improving the electrochemical performance of MOFs in energy storage applications.