Journal Article Hollow carbon nanobubbles: monocrystalline MOF nanobubbles and their pyrolysis

Zhang, Wei  ,  Jiang, Xiangfen  ,  Zhao, Yanyi  ,  Carné-Sánchez, Arnau  ,  Malgras, Victor  ,  Kim, Jeonghun  ,  Kim, Jung Ho  ,  Wang, Shaobin  ,  Liu, Jian  ,  Jiang, Ji-Sen  ,  Yamauchi, Yusuke  ,  Hu, Ming

8 ( 5 )  , pp.3538 - 3546 , 2017-05-01 , Royal Society of Chemistry (RSC)
While bulk-sized metal–organic frameworks (MOFs) face limits to their utilization in various research fields such as energy storage applications, nanoarchitectonics is believed to be a possible solution. It is highly challenging to realize MOF nanobubbles with monocrystalline frameworks. By a spatially controlled etching approach, here, we can achieve the synthesis of zeolitic imidazolate framework (ZIF-8) nanobubbles with a uniform size of less than 100 nm. Interestingly, the ZIF-8 nanobubbles possess a monocrystalline nanoshell with a thickness of around 10 nm. Under optimal pyrolytic conditions, the ZIF-8 nanobubbles can be converted into hollow carbon nanobubbles while keeping their original shapes. The structure of the nanobubble enhances the fast Na+/K+ ion intercalation performance. Such remarkable improvement cannot be realized by conventional MOFs or their derived carbons.

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