期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 11, 页码 4678-4685出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta10334d
关键词
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资金
- National Natural Science Foundation of China [21231002, 21371029, 21571030, 91622108, 21671033]
- Open Research Fund of the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University) [2015. 01]
Hierarchically porous metal-organic frameworks combining the merits of micropores with high surface areas and mesopores/macropores with large diffusion channels are highly desired in catalysis, especially for reactions involving large substrates. In this work, a simple and common solvent templating strategy for the construction of hierarchically micro-and mesoporous polyoxometalate-based metal-organic frameworks by a gel-like/freeze-drying method was achieved. Fast nucleation and interconnection of nanoparticles with micropores were realized in the gel-like stage. Subsequently, the synthesized mesopores were strengthened by the squeezing by ice crystals due to volumetric swelling during the process of freezing water into ice. The hierarchically porous material showed improved catalytic activities for the oxidation of alcohols compared to the catalyst without hierarchical pores, due to it having more easily accessible catalytic sites and the acceleration of mass transfer.
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