期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 47, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202104732
关键词
hierarchical oriented structures; metal-organic frameworks; self-assembly; structure-activity relationship; water-evaporation induced electricity
类别
资金
- National Natural Science Foundation of China [U1662114]
- National Key Research and Development Program of China [2018YFF0215002]
- Independent Innovation Research Fund of Huazhong University of Science and Technology [2017KFYXJJ164]
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education
The concept of hierarchical oriented MOFs has been proposed and successfully applied to create assemblies with high voltage and electricity output through water-evaporation induced electricity generation. The research may offer valuable theoretical guidance for exploring self-assembly of MOFs superstructures and water-evaporation induced electricity generation.
Advances in metal-organic frameworks (MOFs) are stimulating interest in water-evaporation induced electricity generation. Establishing design principles for desirable MOFs and revealing the structure-activity relationship is essential to development of this field. Around this key issue, herein the concept of hierarchical oriented MOFs is proposed and the Cu(BDC-OH) MOFs are organized into hierarchical oriented assemblies by successively using methods of hydrolysis, anion exchange reaction, and heteroepitaxy growth. It is discovered that this hierarchical oriented Cu(BDC-OH) assemblies-based generator containing long-ranged ordered microporous channels exhibits a voltage of 0.6 V and electricity output of 1.56 nW cm(-2) in the natural state of water evaporation. Finite element analysis and density functional calculation elucidate that hierarchical oriented structure of Cu(BDC-OH) MOFs with certain surface charge density have an aggregation effect, dominating the final output voltages. This work not only offers valuable theoretical guidance for exploring self-assembly of MOFs superstructures and water-evaporation induced electricity generation, but also may open interesting perspectives for understanding some fundamental questions about structure-activity relationship in MOFs materials science.
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