聚多巴胺增强的高稳定性二维AgCrSe_(2)膜用于污水净化  

Highly stable two-dimensional AgCrSe_(2) membranes reinforced by polydopamine for contaminated water purification

作　　者：王月 苏越麒 张昊 李文敏 盛方猛 徐婷婷 李兴亚 吴长征 徐铜文 Yue Wang;Yueqi Su;Hao Zhang;Wenmin Li;Fangmeng Sheng;Tingting Xu;Xingya Li;Changzheng Wu;Tongwen Xu(Key Laboratory of Precision and Intelligent Chemistry,Department of Applied Chemistry,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China;School of Chemistry and Materials Sciences,CAS Center for Excellence in Nanoscience,and CAS Key Laboratory of Mechanical Behavior and Design of Materials,Collaborative Innovation Center of Chemistry for Energy Materials(iChEM),University of Science and Technology of China,Hefei 230026,China;UQ Dow Centre for Sustainable Engineering Innovation,School of Chemical Engineering,University of Queensland St Lucia,Queensland 4072,Australia)

机构地区：[1]Key Laboratory of Precision and Intelligent Chemistry,Department of Applied Chemistry,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China [2]School of Chemistry and Materials Sciences,CAS Center for Excellence in Nanoscience,and CAS Key Laboratory of Mechanical Behavior and Design of Materials,Collaborative Innovation Center of Chemistry for Energy Materials(iChEM),University of Science and Technology of China,Hefei 230026,China [3]UQ Dow Centre for Sustainable Engineering Innovation,School of Chemical Engineering,University of Queensland St Lucia,Queensland 4072,Australia

出　　处：《Science China Materials》2024年第7期2225-2231,共7页中国科学（材料科学）（英文版）

基　　金：funding from the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS,XDB0450401);the National Natural Science Foundation of China(22278387 and 22321001);CAS Project for Young Scientists in Basic Research(YSBR-070);the National Key Research and Development Program of China(2022YFA1203601);the Natural Science Foundation of Anhui Province(2208085QB60);Anhui Provincial Innovation Project Funding Program for Overseas Students(2022LCX006);USTC Research Funds of the Double First Class Initiative(YD2060002022).

摘　　要：传统二维纳米片膜在分子和离子分离领域具有巨大潜力,然而在实际污水处理中不可避免地会出现溶胀和易氧化的问题.本研究利用一种新型二维纳米片AgCrSe_(2),采用聚多巴胺(PDA)原位交联策略,成功构筑了高稳定性二维AgCrSe_(2)-PDA膜.该膜能够耐受酸性、碱性介质以及氧化性溶液(0.3 wt%过氧化氢),展现出优异的抗溶胀和抗氧化稳定性.此外,该膜对带负电的染料和乙二胺四乙酸(EDTA)络合的重金属离子的截留率接近100%,通量约为5.0 L m^(−2) h^(−1) bar^(−1).值得注意的是,经过140小时的错流过滤,尽管膜通量略有下降,但该膜对CuEDTA的截留率仍保持在90%左右.这种高稳定性的膜结构源自于PDA与AgCrSe_(2)纳米片之间的配位相互作用.本研究为开发高稳定性的二维膜提供了有效的策略,为工业污水净化提供了新型膜材料.Two-dimensional(2D)nanosheet membranes exhibit significant potential for molecular and ionic separation.Nonetheless,these membranes encounter swelling and oxidation issues when applied for the wastewater treatment in real-world scenarios.Herein,we report a novel approach to fabricate highly stable 2D membranes using AgCrSe_(2) nanosheets reinforced through the in-situ polydopamine(PDA)crosslinking.These AgCrSe_(2)-PDA membranes exhibit outstanding resistance to both acidic and alkaline conditions,as well as to oxidizing agents(e.g.,0.3 wt%H_(2)O_(2)),thereby demonstrating superior anti-swelling and anti-oxidation capabilities.The membranes achieve nearly 100%rejection rates for negatively charged dyes and heavy metal ions complexed with ethylene diamine tetraacetic acid(EDTA),with a permeance of approximately 5.0 L m^(−2) h^(−1) bar^(−1).Notably,the membrane maintains about 90%rejection efficiency for CuEDTA,with only a marginal decrease in flux,even after 140 h of cross-flow filtration.The robustness of the membrane is primarily attributed to the coordination interactions between PDA and the AgCrSe_(2) nanosheets.This study offers an innovative strategy for the development of stable 2D membranes,thereby extending their applicability in the treatment of industrially contaminated water.

关 键 词：2D AgCrSe_(2)membranes in-situ PDA crosslinking anti-swelling ANTI-OXIDATION heavy metal ions removal 

分 类 号：X703[环境科学与工程—环境工程] TQ028.8[化学工程]