典型文献
Pyridinium salt-based covalent organic framework with well-defined nanochannels for efficient and selective capture of aqueous 99TcO4-
文献摘要：
Ionic covalent organic framework(COF)materials with high specific surface areas and well-defined pore structures are desired for many applications yet seldom reported.Herein,we report a cationic pyridinium salt-based COF(PS-COF-1)with a Brunauer-Emmett-Teller(BET)surface area of 2703 m2 g-1,state-of-the-art for an ionic COF.Aided by its ordered pore structure,chemical stability,and radiation resistance,PS-COF-1 showed exceptional adsorption properties toward aqueous ReO4-(1262 mg g-1)and 99TcO4-.Its adsorption performance surpassed its corresponding amorphous analogue.Importantly,PS-COF-1 exhib-ited fast adsorption kinetics,high adsorption capacities,and selectivity for 99TcO4-and ReO4-at high ionic strengths,leading to the successful removal of 99TcO4-under conditions relevant to low-activity waste streams at US legacy Hanford nuclear sites.In addition,PS-COF-1 can rapidly decontaminate ReO4-/99TcO4-polluted potable water(～10 ppb)to drinking water level(0 ppb,part per billion)within 10 min.Density functional theory(DFT)calculations revealed PS-COF-1 has a strong affinity for ReO4-and 99TcO4-,thereby favoring adsorption of these low charge density anions over other common anions(e.g.,Cl-,NO3-,SO4--,CO2).Our work demonstrates a novel cationic COF sorbent for selective radionu-clide capture and legacy nuclear waste management.
文献关键词：
中图分类号：
作者姓名：
Mengjie Hao;Zhongshan Chen;Hui Yang;Geoffrey I.N.Waterhouse;Shengqian Ma;Xiangke Wang
作者机构：
College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China;MacDiarmid Institute for Advanced Materials and Nanotechnology,School of Chemical Sciences,The University of Auckland,Auckland 1142,New Zealand;Department of Chemistry,University of North Texas,Denton,TX 76201,USA
文献出处：
引用格式：
[1]Mengjie Hao;Zhongshan Chen;Hui Yang;Geoffrey I.N.Waterhouse;Shengqian Ma;Xiangke Wang-.Pyridinium salt-based covalent organic framework with well-defined nanochannels for efficient and selective capture of aqueous 99TcO4-)[J].科学通报（英文版）,2022(09):924-932
A类：
Pyridinium,Hanford,radionu,clide
B类：
salt,covalent,organic,framework,well,defined,nanochannels,efficient,selective,capture,aqueous,99TcO4,Ionic,COF,materials,high,specific,surface,areas,pore,structures,desired,many,applications,yet,seldom,reported,Herein,cationic,pyridinium,PS,Brunauer,Emmett,Teller,BET,state,Aided,its,ordered,chemical,stability,radiation,resistance,showed,exceptional,adsorption,properties,toward,ReO4,Its,performance,surpassed,corresponding,amorphous,analogue,Importantly,exhib,ited,fast,kinetics,capacities,selectivity,strengths,leading,successful,removal,under,conditions,relevant,low,activity,waste,streams,US,legacy,nuclear,sites,In,addition,can,rapidly,decontaminate,polluted,potable,water,ppb,drinking,level,part,billion,within,Density,functional,theory,DFT,calculations,revealed,has,strong,affinity,thereby,favoring,these,charge,density,anions,over,other,common,Cl,NO3,SO4,Our,demonstrates,novel,sorbent,management
AB值：
0.583021
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