Rational Synthesis of Crystalline Covalent Triazine Framework with Methylthio Pendant Arms for Efficient Mercury(Ⅱ)Adsorption
The interest in curtailing environmental pollution issues through physical separation processes has inspired an extensive search for novel nanoporous materials with exceptional adsorption capabilities.Covalent triazine frameworks(CTFs),emerged as a class of crystalline covalent organic frameworks(COFs),have been widely examined for various separation applications,owing to their large porosity,high stability,and rich nitrogen(N)doping.The development of CTFs for efficient adsorption of mercury(Ⅱ)(Hg2+)is of great importance for the field,whereas it is rarely attempted,on account of limited synthetic strategies and unknown structural-property relations of conventional CTFs derived from ionothermal approaches.Herein,we report rational synthesis of a crystalline CTF with methylthio pendant arms for efficient removal of Hg2+with an exceptional capacity of 751 mg∙g-1,ranking at the top among previously-reported adsorbents.This work may open up new possibility in the synthesis of COFs for various separations.
CTFsmethylthio pendant armsmercury adsorptionstructural-property relationship
娄艺晓、周路路、杨娜、朱祥
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中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州 730000
中国科学院大学,北京 100049
华东理工大学资源与环境工程学院,上海 200237
共价三嗪框架 甲基硫侧链 汞吸附 结构-性能关系
国家自然科学基金国家自然科学基金国家自然科学基金Selfdeployment Program from Lanzhou Institute of Chemical Physics
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