AbstractCovalent triazine frameworks (CTFs) are normally synthesized by ionothermal methods. The harsh synthetic conditions and associated limited structural diversity do not benefit for further development and practical large-scale synthesis of CTFs. Herein we report a new strategy to construct CTFs (CTF-HUSTs) via a polycondensation approach, which allows the synthesis of CTFs under mild conditions from a wide array of building blocks. Interestingly, these CTFs display a layered structure. The CTFs synthesized were also readily scaled up to gram quantities. The CTFs are potential candidates for separations, photocatalysis and for energy storage applications. In particular, CTF-HUSTs are found to be promising photocatalysts for sacrificial photocatalytic hydrogen evolution with a maximum rate of 2647 μmol h−1 g−1 under visible light. We also applied a pyrolyzed form of CTF-HUST-4 as an anode material in a sodium-ion battery achieving an excellent discharge capacity of 467 mAh g−1.

•SA-MMNPs are synthesized combining microporous polymer with magnetic nanoparticles.•SA-MMNPs can be easily separated by magnet and well dispersed in water.•SA-MMNPs have better adsorption performance than hydrophobic one.Microporous organic polymers (MOPs) are promising adsorbents for water treatment owing to their nanoporous structure with high surface areas. However, their hydrophobic nature, high cost and difficulty in recycling limit their practical application in water treatment. Here, we report the synthesis of new MOPs which combine sodium acrylate (SA) functionalized hypercrosslinked polymer (HCPs) with magnetic Fe3O4 nanoparticles to form a hybrid material (SA-MMNPs). The magnetic hybrid material can be directly aggregated and separated by applying an external magnetic field because of Fe3O4. More importantly, after introducing carboxyl group on the skeleton of HCP, the hydrophilic nature of SA-MMNPs is improved, thus SA-MMNPs can disperse in water well after vigorous shaking. The adsorption property of SA-MMNPs towards water-soluble contaminants was studied by using Rhodamine B (RhB) as adsorbates. The maximum adsorption capacity for RhB of this polymer is up to 216 mg g−1 which is better than hybrid materials without modification (MMNPs). The results constitute a new HCP paradigm with hydrophilic segments for removal of water soluble contaminants with high efficiency and good recyclability in water treatment.Download high-res image (95KB)Download full-size image