聚多巴胺增强的高稳定性二维AgCrSe2膜用于污水净化
Highly stable two-dimensional AgCrSe2 membranes reinforced by polydopamine for contaminated water purification
王月 1苏越麒 2张昊 3李文敏 1盛方猛 1徐婷婷 1李兴亚 1吴长征 2徐铜文1
作者信息
- 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
- 折叠
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AgCrSe2,采用聚多巴胺(PDA)原位交联策略,成功构筑了高稳定性二维AgCrSe2-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5.0Lm-2h-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Cu-EDTA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AgCrSe2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.
Abstract
Two-dimensional(2D)nanosheet membranes exhibit significant potential for molecular and ionic separa-tion.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 AgCrSe2 nano-sheets reinforced through the in-situ polydopamine(PDA)crosslinking.These AgCrSe2-PDA membranes exhibit out-standing resistance to both acidic and alkaline conditions,as well as to oxidizing agents(e.g.,0.3 wt％H2O2),thereby de-monstrating superior anti-swelling and anti-oxidation cap-abilities.The membranes achieve nearly 100％rejection rates for negatively charged dyes and heavy metal ions complexed with ethylene diamine tetraacetic acid(EDTA),with a per-meance of approximately 5.0Lm-2h-1 bar-1.Notably,the membrane maintains about 90％rejection efficiency for Cu-EDTA,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 AgCrSe2 nanosheets.This study offers an in-novative strategy for the development of stable 2D mem-branes,thereby extending their applicability in the treatment of industrially contaminated water.
关键词
2D AgCrSe2 membranes/in-situ PDA crosslinking/anti-swelling/anti-oxidation/heavy metal ions removalKey words
2D AgCrSe2 membranes/in-situ PDA crosslinking/anti-swelling/anti-oxidation/heavy metal ions removal引用本文复制引用
基金项目
funding from the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)
funding from the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0450401)
National Natural Science Foundation of China(22278387)
National Natural Science Foundation of China(22321001)
CAS Project for Young Scientists in Basic Research(YSBR-070)
National Key Research and Development Program of China(2022YFA1203601)
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)
出版年
2024
NETL
NSTL
万方数据