Ordered mesoporous metal-organic frameworks directed by amphiphilic block polymer as soft-template in N,N-dimethylformamide media
Ordered mesoporous Metal-Organic Frameworks ( meso MOFs), integrating mesopores and micropores, address mass transfer limitations characteristic of microporous materials, thus broadening their application spectrum. However, the synthesis of meso MOFs has been predominantly achievable in aqueous media, rather than in organic solvents, which are more conducive to the growth and stabilization of MOFs. This is primarily attributed to the challenge in forming stable and uniform micelles from block copolymers within organic systems. In this work, meso MOFs are synthesized within N,N-dimethylformamide (DMF) media for the first time, via a micellar microphase separation method facilitating by introducing trace water into the organic solvent DMF. These meso MOFs, featuring non-exposed spherical mesopores and inherent microporosity, demonstrate significantly enhanced performance in the accumulation of reactants, and such characteristics render these materials ideal nanoreactors, endowing them with superior adsorption and degradation capabilities. The adsorptive and degradation removal of tetracycline (TC) by m MIL-101 reached 93.7 %, with its efficiency in both adsorption and degradation of TC being significantly higher than that of traditional MIL-101. This synthetic approach expands the scope of meso MOFs preparation in organic solvents, providing insights for designing a new generation of meso MOFs with diverse compositions and structures, promising applications across various fields and advancing MOF-based technologies.
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