WATER RESEARCH
·
2024
·
IF 11.4
Ning Gan,Yuqing Lin,Baolong Wu,Yulong Qiu,Haopan Sun,Jingwen Su,Jianguo Yu,Qian Lin,Hideto Matsuyama
Ion-selective membranes (ISM) with sub-nanosized pore channels hold significant potential for applications in saline wastewater treatment and resource recovery. Herein, novel synergistic ion channels featuring bi-periodic structures were constructed through the coordination of functional Cyclen (quaternary_1,4,7,10-tetraazacyclododecane, Q_Cyclen) and Cu 2+ -m-Phenylenediamine (Cu 2+ -MPD) to develop supramolecular membranes for lithium extraction. The exterior quaternary ammonium-rich sites exhibit a significant Donnan exclusion effect, resulting in tremendous mono/divalent (Li + /Mg 2+ ) ion selectivity; while the interior regular-confined channels of Cyclen yield a fast vehicular pathway, facilitating water molecules and Li + ion-selective transport. The optimized membrane exhibited an increased water permeance of 19.2 L·m -2 ·h -1 ·bar -1 and simultaneously promoted Li + /Mg 2+ selectivity (achieving a selectivity of 18.5 under a Mg 2+ /Li + mass ratio of 30), surpassing the trade-off limit of conventional nanofiltration membranes. Due to the acquired excellent Li + /Mg 2+ selectivity, lithium extraction from simulated salt-lake brines was successfully achieved through a two-stage nanofiltration process, reducing the Mg 2+ /Li + mass ratio from 40 to 1.1. This work validates the applicability of macrocyclic with intrinsic sub-nanosized channels and desired multifunctionality for developing high-performance ISM for efficient lithium separation and beyond.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 22
·50519
·
IF 3.125
Wei Wang,Peng Zhang,Yaping Shi,Zhichao Zhang,Xin Xu,Ping Ding
The composite membrane with the advantages of high separation efficiency and wide application, has been widely concerned in the field of water purification and molecular separation. However, the common composite membrane cannot achieve continuity, or the grafting process is complex, which significantly hinders its further development. In this work, the in-situ polymerization of UiO-66/PVDF supramolecular flat membranes as the continuous and high-performance composite membrane can be easily synthesized using the supramolecular force, (such as, hydrogen bond, etc.). These supramolecular membranes exhibit good hydrophilic (61°) and anti-fouling performance for bovine serum albumin (BSA) solution with rejection rate 97.79% than the original membrane. Moreover, this membrane can achieve more MOF doping based on maintaining the membrane performance, which undoubtedly greatly improves its hydrophilicity and mechanical properties. In addition, we also characterized the porous microstructure of the UiO-66/PVDF supramolecular membrane to analyze the influence of different doping amounts on the membrane structure. This supramolecular membrane has the advantages of simple synthesis, good hydrophilicity and water separation performance, which provides a more convenient and effective way for the preparation of MOFs/polymer flat membrane, and also provides a new method and new idea for expanding the application of MOFs/polymer ultrafiltration membrane in water treatment.
研究领域:
材料科学
·
环境工程
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Haoyuan Cai,Peng Wang,Xiaotong Chen,Yu Wang,Dun Zhang
Herein, we fabricate a novel metal-phenolic supramolecular film on aluminium, which can control release of loaded biocides when S 2− concentration is higher than 10 mM or in sulfate reducing bacteria (SRB) environment with a long incubation period. The protection effect of the film on microbially influenced corrosion (MIC) induced by SRB is analyzed with fluorescence microscopy and electrochemical measurement. A novel microbiological corrosion protection mechanism is proposed based on its effective roles to suppress SRB settlement and insulate corrosive medium. The intelligent film maintains a longtime antibacterial behavior owing to its S 2- -responsive character, which enhances the microbiological corrosion resistance.
研究领域:
材料科学
·
腐蚀工程
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Ying Wang,Yue Yang,Zhiyuan Zha,Jixiao Wang,Zhi Wang,Song Zhao
Nanofiltration process has been perceived as one of the promising approaches in desalination and separation of monovalent/divalent salts. Despite significant progresses has been made in permeability and salt rejection, the industrial separation for monovalent/divalent salts is limited by the insufficient selectivity for ions with different charges and sizes. This work firstly proposed a porous organic cage supramolecular membrane with topologically structured “window-to-window” channels for the fast transport of monovalent ions and water molecules. Specifically, porous organic cage (RCC3) molecule and nonpolar alkyl of dodecyltrimethylammonium bromide (DTAB) were assembled into supramolecular [email protected] through hydrophobic interaction by molecular recognition of polar cavity. Furthermore, terephthaloyl chloride (TPC) was employed as a crosslinker by interfacial polymerization to construct [email protected] supramolecular film onto the surface of polydopamine modified polysulfone (PSf) substrate. The results suggested that [email protected] membrane displayed a high permeability of 13.9 L m −2 h −1 bar −1 , and attractive performance for monovalent/divalent salts separation and small molecule solutions desalination. The salt rejections to Na 2 SO 4 , MgSO 4 , NaCl and MgCl 2 are 98.5%, 90.1%, 19.8% and 12.8%, and the selectivities of NaCl/Na 2 SO 4 and NaCl/MgSO 4 reached 42.6 and 7.8, respectively. Besides, the separation factors for NaCl/medicine and NaCl/dye mixtures are 95.5 of δ NaCl/DG and 76.6 of δ NaCl/CR , respectively. The excellent separation performance of [email protected] supramolecular membrane provides a new idea for developing high-efficiency membranes for monovalent/divalent salts separation.
研究领域:
材料科学
·
化学工程
·
膜技术
·
脱盐
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Ning Gan,Yuqing Lin,Yiren Zhang,Yulong Qiu,Jianguo Yu,Qianhong She,Tooru Ooya,Qian Lin,Hideto Matsuyama
Tunable gating ion-conducting membranes with high water permeability and precise ion selectivity remain urgently demanded in smart nanofiltration for efficient lithium extraction . Herein, inspired by the filtration function of protein channels, we report a smart and high-performance supramolecular membrane constructed via coordination between quaternary ammonium ligands ( m -phenylenediamine/polyethyleneimine) and metal ion center (Cu 2+ ). The pore architecture of the supramolecular membrane is dynamic and can be switched by applying pH stimulus, where coordinated interchain expands when exposed to acidic operating conditions and induces concomitantly reinforced electrostatic exclusion due to enhanced local charge density. The tunable gating regularity enables operando modulation of precise ionic separation in situ. The resulting membrane exhibits significantly enhanced water permeance (19.8 L m −2 h −1 ·bar −1 ) and simultaneously promoted Li + /Mg 2+ selectivity (R Mg2+ = 96.4 %), surpassing typical trade-off between permeability and selectivity at pH 3 condition. This study demonstrates the amazing capability of environmental-responsive regulation of membrane pore-channel structure, and provides inspiration for engineering advanced supramolecular membranes for lithium extraction and beyond.
研究领域:
材料科学
·
化学工程
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）