文献类型：期刊文献

英文题名：Hooped Amino-Group Chains in Porous Organic Polymers for Enhancing Heavy Metal Ion Removal

作者：Zhao, Kaiqing[1,2];Kong, Lingkai[1,2];Yang, Weiwei[1,2];Huang, Yuan[3];Li, He[1,2];Ma, Shihao[3];Lv, Wenjie[3];Hu, Jun[1,2];Wang, Hualin[3];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：47

起止页码：44751

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20194807753924);WOS:【SCI-EXPANDED(收录号:WOS:000500415700101)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 91834301, 21676080, and 21878076) and the Science and Technology Commission of Shanghai Municipality (award number: 19160712100)

语种：英文

外文关键词：heavy metal ion removal; amino-chain stretching state; porous organic polymer; coordination mode; rational microenvironment

摘要：By adjusting the stretch state of a triethylenetetramine (TETA) chain in an amine-functionalized porous organic polymer (POP), two adsorbents were designed to study the rational microenvironment for heavy metal ion removal. The quantum calculation elucidated that the hooped amino chains in FC-POP-CH(2)TETA-H exhibited stronger interactions with Pb(II) than the extended one in FC-POP-CH(2)TETA-E, not only through metal ligand chelation but also metal coordination. The high binding energy of -2624 kJ mol(-1) as well as the constructed microenvironment by the hooped amino chains ensured an extremely high Pb(II) capacity of 1134 mg g(-1) on FC-POP-CH(2)TETA-H. Meanwhile, more than 5 min to approach adsorption equilibrium revealed its ultrafast adsorption rate. It also showed excellent broad removal capability for multiple metal ions and nonsensitivity to pH. Therefore, by controlling the microenvironmental structures with suitable porosity, functional group stretching states, and coordination modes, the removal efficiency of heavy metal ions would be significantly enhanced, which further provided a promising strategy for designing a rational microenvironment to improve the task-specific separation properties.