2022年12月1日 · There are two main strategies to functionalize COFs: one is to design and graft functional groups to the monomers and then synthesize the COFs, known as the “direct synthesis” method [16]; another is to introduce functional groups to the synthesized COFs, called “post-modification” method [17].

Briefly, in the first step, a Schiff-base COF, TpTGCl, was prepared by the condensation of triaminoguanidinium chloride (TGCl) with 1,3,5-triformylphloroglucinol (Tp), and was then exfoliated to obtain 2D nanosheets as the 2D component. TEMPO-oxidized CNFs with abundant carboxylic groups on their surface were employed as the 1D component.

2022年1月15日 · The DhaTG Cl membrane with excellent H + /Fe 2+ selectivity and acid-stability indicated that the pore environment engineering of COF materials by the introduction of OH functionalities could be a promising strategy to improve the acid separation performance of …

This comprehensive review delves into the myriad applications of COF materials as effective sorbents within the realm of solid-phase extraction, facilitating the recovery of metals from secondary...

2022年11月19日 · Covalent organic frameworks (COF), with rigid, highly ordered and tunable structures, can actively manipulate the synergy of entropic selectivity and enthalpic...

2020年5月1日 · Covalent organic frameworks (COFs) is made by covalent bonding of light elements, such as carbon, oxygen, nitrogen, boron and hydrogen, which can be flexibly synthesized as a porous material with low density, high permanent porosity and controllable sizes.

2024年11月3日 · Herein, we designed a guanidinium-based COF (triaminoguanidine chloride [TGCl]–2,5-dihydroxyterephthaldehyde [DHA]) membrane with a high density of positive charges, hydrogen bonding sites, and the Cl − counter ions along the 1D channels, exhibiting fast ion transport and efficient ion separation (Figure 1).

通过胍类单体和2,5-二甲氧基对苯二甲醛反应制备的离子型cof材料tgdm，在高温条件下具有高效捕获低浓度碘（i2）的能力。 TGDM表现出出色的吸附性能和稳定性，可在150°C下对150 ppmv的I2吸收高达30 wt%，并可轻松回收再利用。

2024年8月7日 · In this protocol, we provide detailed methods and conditions for fabricating high-quality COFs, including olefin-linked COFs (NKCOF-10 (ref. 40), NKCOF-12 (ref. 42), NKCOF-41 (ref. 43) and NKCOF ...

Covalent organic frameworks (COFs) are a class of crystalline porous organic polymers with polygonal porosity and highly ordered structures. The most prominent feature of...