Individually Encapsulated Frame-in-Frame Structure,ACS Applied Energy Materials

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Individually Encapsulated Frame-in-Frame Structure
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-05-20 00:00:00 , DOI: 10.1021/acsmaterialslett.0c00161
Shouping Chen ₁ , Xiao-Yuan Liu , Jianbo Jin , Mengyu Gao ₁ , Chubai Chen , Qiao Kong , Zhe Ji _{1,

2} , Gabor A. Somorjai ₁ , Omar M. Yaghi _{1,

2} , Peidong Yang _{1,

2}

Affiliation

A platinum-based nanoframe is a hollow frame with superior catalytic behavior, and a metal–organic framework (MOF) is another porous frame with multifunctionalities. Here, we present the combination of these two components into an individually encapsulated frame-in-frame structure. Via the surface functionalization with hexadecyltrimethylammonium bromide (CTAB) as the bridging layer, the Pt–Ni nanoframe is encased in a special MOF, zeolitic imidazolate framework-8 (ZIF-8), to achieve a single core–shell structure, as evidenced by the three-dimensional tomography. The growth trajectory of such frame-in-frame nanocomposite is also tracked, revealing that ZIF-8 first nucleates in the solution, then attaches to the surface of the nanoframe, and finally grows to capture the entire nanoframe, accomplishing the one-in-one encapsulation. Following the same concept, by utilizing ZIF-67 as the sacrificial layer, the Pt–Ni nanoframe is further solely embedded in ZIF-8 to form the single yolk–shell structure, which has a cavity between the core and the shell. This work provides a new method to build frame-in-frame structures, consisting of different frameworks, and to explore their synergistic properties.

中文翻译：

单独封装的框架中框架结构

铂基纳米骨架是具有卓越催化性能的空心骨架，金属有机骨架（MOF）是另一种具有多功能性的多孔骨架。在这里，我们将这两个组件的组合呈现为一个单独封装的帧中框架结构。通过使用十六烷基三甲基溴化铵（CTAB）作为桥接层的表面功能化，将Pt-Ni纳米框架包裹在特殊的MOF沸石咪唑酸盐骨架8（ZIF-8）中，从而实现了单核-壳结构三维断层扫描。还跟踪了这种框架内纳米复合材料的生长轨迹，揭示了ZIF-8首先在溶液中成核，然后附着在纳米框架的表面，最后生长以捕获整个纳米框架，从而实现了单层结构。一种封装。遵循相同的概念，通过使用ZIF-67作为牺牲层，Pt-Ni纳米框架进一步单独嵌入ZIF-8中，以形成单一的蛋黄-壳结构，该结构在核和壳之间具有空腔。这项工作提供了一种新的方法来构建由不同框架组成的框架结构，并探索它们的协同特性。

更新日期：2020-05-20

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