TY - JOUR
T1 - Two-Dimensional Metal-Organic Framework Superstructures from Ice-Templated Self-Assembly
AU - Song, Yujie
AU - Song, Xiaokai
AU - Wang, Xiaoke
AU - Bai, Jingzheng
AU - Cheng, Fang
AU - Lin, Chao
AU - Wang, Xin
AU - Zhang, Hui
AU - Sun, Jianhua
AU - Zhao, Tiejun
AU - Nara, Hiroki
AU - Sugahara, Yoshiyuki
AU - Li, Xiaopeng
AU - Yamauchi, Yusuke
N1 - Funding Information:
X.S. thanks the China Scholarship Council for financial support (no. 202008320245) as well as the 2020 Qinglan Project of Jiangsu Province, and the Zhongwu Young Talents Program of JSUT. X.L. acknowledges financial support from the National Natural Science Foundation of China (no. 21972163), the Fundamental Research Funds for the Central Universities, the DHU Distinguished Young Professor Program, the Development Fund for Shanghai Talents, the Innovation Program of Shanghai Municipal Education Commission (no. 2021-01-07-00-03-E00109), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning. H.N., Y.S., and Y.Y. also acknowledge the JST-ERATO Yamauchi Materials Space-Tectonics Project (JPMJER2003). This work was performed in part at the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australia’s researchers.
Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/9/28
Y1 - 2022/9/28
N2 - Here, we report the synthesis of two-dimensional (2D) layered metal-organic framework (MOF) nanoparticle (NP) superstructures via an ice-templating strategy. MOF NP monolayers and bilayers can be obtained by regulating the concentration of colloidal MOF NPs without any external fields during self-assembly. Adjacent polyhedral MOF NPs are packed and aligned through crystalline facets, resulting in the formation of a quasi-ordered array superstructure. The morphology of the MOF layers is well preserved when subjected to pyrolysis, and the obtained carbon NPs have hollow interiors driven by the outward contraction of MOF precursors during pyrolysis. With the advantages of large surface areas, hierarchical porosity, high exposure of active sites, and fast electron transport of the 2D layered structure, the mono- and bilayered carbon NP superstructures show better oxygen reduction activity than isolated carbon particles in alkaline media. Our work demonstrates that ice-templating is a powerful strategy to fabricate superstructures of various MOFs and their derivatives.
AB - Here, we report the synthesis of two-dimensional (2D) layered metal-organic framework (MOF) nanoparticle (NP) superstructures via an ice-templating strategy. MOF NP monolayers and bilayers can be obtained by regulating the concentration of colloidal MOF NPs without any external fields during self-assembly. Adjacent polyhedral MOF NPs are packed and aligned through crystalline facets, resulting in the formation of a quasi-ordered array superstructure. The morphology of the MOF layers is well preserved when subjected to pyrolysis, and the obtained carbon NPs have hollow interiors driven by the outward contraction of MOF precursors during pyrolysis. With the advantages of large surface areas, hierarchical porosity, high exposure of active sites, and fast electron transport of the 2D layered structure, the mono- and bilayered carbon NP superstructures show better oxygen reduction activity than isolated carbon particles in alkaline media. Our work demonstrates that ice-templating is a powerful strategy to fabricate superstructures of various MOFs and their derivatives.
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U2 - 10.1021/jacs.2c06109
DO - 10.1021/jacs.2c06109
M3 - Article
C2 - 36102877
AN - SCOPUS:85138807323
VL - 144
SP - 17457
EP - 17467
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 38
ER -