Jinyuan Hu,Boru Cai,Yaohui Wang,Zhengran Bian,Tianle Hou,Yanwei Sun
Amorphous metal–organic frameworks (MOFs) present significant potential for achieving high permeability and selectivity in separation applications. However, developing effective fabrication strategies for amorphous MOF membranes with well-defined channels remains a considerable challenge. In this study, amorphous titanium-based MOF membranes with concurrently optimized intercrystalline and intracrystalline selective transport channels were successfully prepared. The resulting membranes exhibited exceptional sieving performance for dyes with molecular weight cutoff of 600 Da. Additionally, defect-rich dual water channels within and between the amorphous MOF aggregates led to a remarkable water permeances up to 107.4 L m −2 h −1 bar −1 , significantly surpassing the benchmarks set by other nanofiltration membranes. This work offers valuable insights into the influence of amorphization on the design of a wide variety of MOF membranes, paving the way for advanced separation applications.
Jinghui Wang,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
In spite of the rapid development of nanozyme, it is still challenging to develop multifunctional nanozyme with high oxidase-like activity. In this work, a novel type of amorphous MOF based nanozyme (CA-Cu) with both laccase- and catecholase-like activity was prepared by the facile solvothermal reaction of cyanuric acid and Cu 2+ to mimick the N-Cu coordinated environment between the imidazole and Cu 2+ in their active site. Due to the excellent activity, substrate universality, recyclability and stability of CA-Cu nanozyme, it shows broad application prospects in degradation and detection of phenolic compounds. Besides, the structure–activity relationship between N-Cu coordinated environment and laccase/catecholase-like activity has been further proved.
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