Liu Chao, Huang Xiaodan, Liu Jizi, Wang Jing, Chen Zibin, Luo Rui, Wang Chaohai, Li Jiansheng, Wang Lianjun, Wan Jingjing, Yu Chengzhong
School of Chemistry and Molecular Engineering East China Normal University Shanghai 200241 P. R. China.
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing 210094 P. R. China.
Adv Sci (Weinh). 2020 Jan 3;7(4):1901480. doi: 10.1002/advs.201901480. eCollection 2020 Feb.
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.
沉积在石墨烯上的超薄金属有机框架纳米片（UMOFNs）极具吸引力，然而，在石墨烯上以可控取向直接生长UMOFNs仍然具有挑战性。在此，报道了一种低浓度辅助异质成核策略，用于在还原氧化石墨烯（rGO）表面以可控取向直接生长UMOFNs。这种通用策略可应用于在rGO上构建各种UMOFNs，包括Co-ZIF、Ni-ZIF、Co、Cu-ZIF和Co、Fe-ZIF。当UMOFNs大多垂直附着在rGO上时，会形成具有开放孔结构和优异导电性的三维泡沫状分级结构（命名为UMOFNs@rGO-F），作为锂离子电池和析氧的电极材料表现出优异性能。该贡献为提高MOFs在储能应用中的电化学性能提供了一种策略。
