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• W4297994981 startingPage "121043" @default.
• W4297994981 abstract "Hydrogen peroxide (H 2 O 2 ) enrichment is a significant separation process that catches tremendous attention in energy and environment fields. Membrane technology is envisioned as a promising candidate for H 2 O 2 enrichment owing to its cost-effective and environmental-friendly features. However, it is challenging to develop membrane materials tolerant to rigorous operations of H 2 O 2 enrichment. Here, we explored covalent organic frameworks (COFs) as membrane materials for H 2 O 2 enrichment. The all-organic and periodical assembled nature endowed COFs with excellent chemical robustness, which exhibited excellent performance for H 2 O 2 enrichment. A novel mixed linker modulated assembly method was developed to modulate the interfacial polymerization for COF membrane. Hydrazine hydrate (Hz) and p -phenylenediamine (Pa) were chosen as mixed diamine linkers to synthesize the COF layer composed of TpPa and TpHz clusters. By varying the relative proportion of the mixed linkers, the pore size of COF membranes was tuned from 1.70 nm to 0.50 nm, which exhibited more pronounced size-selective ability for the separation of water and H 2 O 2 . Moreover, the water capture ability of membranes was also fortified by introducing hydrophilic linkers during interfacial polymerization process. As a result, the COF membranes showed a total flux of 38.35 kg m −2 h −1 , H 2 O/H 2 O 2 separation factor of 23 and superior long-term operation performance up to 7 days, manifesting the great potential in H 2 O 2 enrichment. Our study may open a novel route for engineering membranes toward molecular separations involving strong oxidative components. • COF membrane was used to separate mixture with strong oxidant for the first time. • Mixed linker modulated method was proposed to fabricate COF membranes. • Narrowed pore size and increased hydrophilicity were simultaneously achieved. • COF membrane had superior separation performance in hydrogen peroxide enrichment." @default.
• W4297994981 created "2022-10-01" @default.
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• W4297994981 date "2022-12-01" @default.
• W4297994981 modified "2023-09-29" @default.
• W4297994981 title "Covalent organic framework membranes prepared via mixed linker modulated assembly for hydrogen peroxide enrichment" @default.
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• W4297994981 doi "https://doi.org/10.1016/j.memsci.2022.121043" @default.
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