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A Thermally Promoted Homogenous-Floating-Concentrating Strategy Synthesizing Highly Crystalline Triazine/hydroxyl-Rich COFs for 4-Nitrophenol Adsorption
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-11-23 , DOI: 10.1002/marc.202200786
Xiaogeng Lin 1 , Chen Li 2 , Yasan He 2 , Lei Li 1
Affiliation  

In this work, a “thermally promoted homogenous-floating-concentrating” strategy is reported for the rapid synthesis of highly crystalline triazine/hydroxyl-rich COFs under mild conditions, using for the effectively adsorbing 4-nitrophenol (4-NP) in aqueous solutions. This strategy originates from an optimized “homogenous-floating-concentrating” method as reported in the previous work. Both gradually improving concentration and heat treatment promote the condensation reaction between amino and aldehyde groups, resulting in high crystallinity and shorter reaction time. The obtained COFs demonstrate better crystallinity and higher surface area in comparison with the counterparts prepared by solvothermal strategy. A maximum surface area of 2391 m2 g-1 is achieved. The COFs exhibit excellent 4-NP adsorption capacity (Qmax = 1402.0 mg g−1), which is attributed to abundant triazine/hydroxyl-groups on the COF skeleton and their strong H-bonding interaction with 4-NP.

中文翻译:

一种热促进的均相-漂浮-浓缩策略合成高结晶三嗪/富羟基 COFs 用于 4-硝基苯酚吸附

在这项工作中,报道了一种“热促进均相-漂浮-浓缩”策略,用于在温和条件下快速合成高度结晶的三嗪/富含羟基的 COF,用于在水溶液中有效吸附 4-硝基苯酚 (4-NP) . 该策略源自先前工作中报道的优化的“均质-浮动-浓缩”方法。逐渐提高浓度和热处理都促进了氨基和醛基之间的缩合反应,导致结晶度高和反应时间缩短。与通过溶剂热策略制备的对应物相比,获得的 COF 具有更好的结晶度和更高的表面积。最大比表面积为 2391 m 2 g -1已完成。COF 表现出出色的 4-NP 吸附能力(Q max = 1402.0 mg g -1),这归因于 COF 骨架上丰富的三嗪/羟基及其与 4-NP 的强氢键相互作用。
更新日期:2022-11-23
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