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Shape‐Defined Hollow Structural Co‐MOF‐74 and Metal Nanoparticles@Co‐MOF‐74 Composite through a Transformation Strategy for Enhanced Photocatalysis Performance
Author(s) -
Deng Xin,
Yang Lanlan,
Huang Hanlin,
Yang Yuying,
Feng Shiqiang,
Zeng Min,
Li Qi,
Xu Dongsheng
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201902287
Subject(s) - metal organic framework , nanoparticle , materials science , photocatalysis , chemical engineering , nanotechnology , composite number , catalysis , chemistry , composite material , organic chemistry , adsorption , engineering
In recent years, metal–organic frameworks (MOFs) have received extensive interest because of the diversity of their composition, structure, and function. To promote the MOFs' function and performance, the construction of hollow structural metal–organic frameworks and nanoparticle–MOF composites is significantly effective but remains a considerable challenge. In this article, a transformation strategy is developed to synthesize hollow structural Co‐MOF‐74 by solvothermal transformation of ZIF‐67. These Co‐MOF‐74 particles exhibit a double‐layer hollow shell structure without remarkable shape change compared to original ZIF‐67 particles. The formation of hollow structure stemmed from the density difference of Co between ZIF‐67 and Co‐MOF‐74. By this strategy, hollow structural Co‐MOF‐74 with different sizes and shapes are obtained from corresponding ZIF‐67, and metal nanoparticles@Co‐MOF‐74 is synthesized by corresponding nanoparticles@Co‐ZIF‐67. To verify the structural advantages of hollow structural Co‐MOF‐74 and Ag nanoparticles@Co‐MOF‐74, photocatalytic CO 2 reduction is used as a model reaction. Conventionally synthesized Co‐MOF‐74 (MOF‐74‐C), hollow structural Co‐MOF‐74 synthesized by transformation method (MOF‐74‐T) and Ag nanoparticles@Co‐MOF‐74 (AgNPs@MOF‐74) are used as cocatalysts in this reaction. As a result, the cocatalytic activity of MOF‐74‐T and AgNPs@MOF‐74 is 1.8 times and 3.8 times that of MOF‐74‐C, respectively.