DESALINATION
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2020
·
IF 7.098
Weifeng Liu,Guang Yan,Erhui Zhang,Qi Liang,Lei Qin,Meiling Wang,Xuguang Liu,Yongzhen Yang
A novel lithium ion imprinted membrane (Li + -IIM) was synthesized by unipolar pulsed electropolymerization , using lithium ion as template ion, 2-hydroxymethyl-12-crown-4 ether as capture agent, pyrrole as conductive agent and crosslinking agent. The morphology and structure of the products were characterized by using field emission scanning electron microscopy and Fourier transformation infrared spectroscopy . The adsorption behaviors were detected by inductively coupled plasma-optical emission spectrometry . At pH = 1.0, the maximum adsorption capacity of Li + -IIM towards lithium ion reached 16.40 mg g −1 in 40 mg L −1 Li + solution, within 80 min. The resulting Li + -IIM exhibited excellent selectivity for Li + because the selectivity coefficients of Li + with respect to Na + , K + , Mg 2+ , Al 3+ and Fe 3+ are 4.20, 4.11, 4.13, 4.30 and 4.28, respectively. After five adsorption-desorption cycles, the adsorption capacity of Li + -IIM still maintained 95.88%, indicating that the obtained imprinted membrane has excellent regeneration ability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Frontiers in Chemistry
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2020
·
IF 3.693
Zhao Xiaobin,Cheng Yun,Xu Helin,Hao Yanyan,Lv Yin,Li Xueqin
Acteoside (ACT) belongs to a type of phenylethanoid glycosides (PhGs), and it is worthy of obtaining high-purity due to its significant medicinal functions. In this study, a novel class of MIMs was designed and synthesized with PVDF membranes as the base membrane for high selective separation and enrichment of ACT. The effects of the different functional monomers, the amounts of functional monomers, crosslinking agents, and initiators on the separation properties of MIMs were investigated. Furthermore, adsorption ability, permeation capacity, and reusability of MIMs were discussed for ACT. It indicated that MIM7 was the optimal performance of MIMs. The adsorption ability of MIM7 for ACT was 62.83 mg/g, and the selectivity factor (α) of MIM7 was up to 2.74 and its permeability factor (β) was greater than 2.66. Moreover, the adsorption amount of MIM7 was still more than 88.57% of the initial value after five cycles. As an ACT imprinted layer of MIMs only had recognition sites for ACT molecules, which recombined with the recognition sites in the membrane permeation experiment, ACT molecules penetration was hindered. However, the analogs of ECH successfully passed MIMs. It indicated that the selective MIMs for ACT followed the mechanism of delayed permeation. This work provides an important reference for the high permselective separation of natural products.
研究领域:
药学
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分离科学与技术
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Jia Gao,Shi Zhou,Zhiqiang Hou,Qi Zhang,Minjia Meng,Chunxiang Li,Yilin Wu,Yongsheng Yan
In this paper, one pot-economical approach for in-situ modification of enoxacin (EXC) imprinted nanocomposite membrane was developed by employing carbon nanosphere sol (CNS) as coagulation bath during phase inversion process for increasingly antifouling property. Using polydopamine (pDA) as hydrophilic coating layer and second-reaction platform, the CNS based biomimetic molecularly imprinted nanocomposite membranes (CBMIMs) were then obtained which used EXC as the target molecule for specific adsorption and separation EXC from the sewage. The imprinting polymer layer was highly hydrophilic, which advanced antifouling performance to avoid the adsorption of contaminant protein. Using EXC as template, the optimal fabrication conditions on performances and properties of CBMIMs were studied. Isothermal adsorption curves, adsorption kinetics and rebinding selectivity were investigated to well explain the selectivity adsorption mechanism of imprinted membranes on EXC. The CBMIMs presented highly selective specificity, short kinetic equilibrium time and preferable rebinding capacity for EXC. The rebinding ability and imprinted factor ( β ) of CBMIMs could reach 32.10 mg g −1 and 3.15, respectively, which presented various highly favorable features, including high rebinding strength and excellent selective performance. Furthermore, the adsorption of actual environmental sewage by CBMIMs was investigated, which highlighted the advantage of CBMIMs. Several favorable performances of CBMIMs also provided further application for sewage treatment in the future.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 94
·91659-91668
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IF 3.289
Yanli Mao,Minjia Meng,Li Yan,Fengquan Sun,Yongsheng Yan,Shijuan Liu
Herein, highly selective molecularly imprinted membranes (MIM) for methyl salicylate (MS) are synthesized with 4-vinylpyridine (4-VP), acrylamide (AM) or methacrylic acid (MAA) as the functional monomer based on the Al2O3 microporous ceramic membrane. Fast kinetic equilibrium for the rebinding of MS was found on all the imprinted membranes. Compared with AM-MIM and MAA-MIM, 4-VP-MIM presents a stronger adsorption capacity and higher permeation selectivity for MS due to the formation of ionic bonds between MS and 4-VP. SEM analysis shows that the surface morphology of the membranes is strongly influenced by the concentration of vinyltrimethoxysilane. Compared with 4-VP-MIM (1, 2 or 4), 4-VP-MIM3 possesses higher kinetic equilibrium adsorption, binding capacity and better selectivity for MS. It was found that the pseudo-second-order kinetic model is suited to describe the kinetic of 4-VP-MIM3, as determined by multiple regression analysis. The adsorption isotherm analysis exhibits that 4-VP-MIM3 has the maximum adsorption capacity for MS. Moreover, the selectivity experiment shows that the selectivity coefficients of 4-VP-MIM3 for MS relative to salicylic acid (SA) and phenol are 2.4185 and 2.2277, respectively, which are close to the predicted selectivity coefficient values.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
TALANTA
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2017
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IF 4.162
Qian Yang,Xiaqing Wu,Hailong Peng,Longwen Fu,Xingliang Song,Jinhua Li,Hua Xiong,Lingxin Chen
A novel recognition element of molecularly imprinted films (MIFs) was synthesized by wet phase inversion (WPI) on the surface of Ti/TiO 2 electrode for highly selective and sensitive electrochemical detection of bisphenol A (BPA). The Ti/TiO 2 /MIFs sensor was constructed by casting the precursor poly(acrylonitrile- co -acrylic acid) (p(AN- co -AA)) in dimethyl sulfoxide containing template molecule BPA onto the electrode and then immersing into water, resulting in simultaneous p(AN- co -AA) precipitation and BPA imprinting via the facile WPI. The imprinted sites could selectively rebind BPA through hydrogen bonding and hence lead to the equalizing current increase in amperometric detection, by which the BPA could be sensed electrochemically. Accordingly, the Ti/TiO 2 /MIFs sensor offered a favorable linearity within the wide range over five orders of magnitude (4.4 nM–0.13 mM), and a low detection limit down to 1.3 nM. Excellent recognition selectivity for BPA was also attained over its analogues. Furthermore, this sensor was successfully applied to detect BPA in seawater and paper cup samples, and high recoveries were 86–110% with low relative standard deviations of 1.3–3.2%. By using BPA as a model, the MIFs-based method may provide a facile, rapid, and cost-effective way for ultrasensitive electrochemical measurements of various targeted compounds with good applicability to WPI.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Jianxian Zeng,Chaoqiang Lv,Guoqing Liu,Zhe Zhang,Zhihui Dong,JinYan Liu,Ying Wang
A novel ion-imprinted blend membrane was fabricated to separate selectively platinum(IV) from aqueous media. An amphiphilic copolymer poly(methyl methacrylate)-b-poly(4-vinylpyridine) (PMMA- b -P4VP) was firstly synthesized via the reversible addition fragmentation chain transfer polymerization , and characterized by 1 H NMR, FT-IR and GPC. Subsequently, poly(vinylidene fluoride) (PVDF) blend membranes were prepared using PMMA- b -P4VP as a blending additive. Effects of the following factors on performance of blend membranes were systematically examined: P4VP content of PMMA- b -P4VP, solvent type, and PMMA- b -P4VP/PVDF ratio. Further, platinum(IV) ion-imprinted membrane (Pt(IV)-IIM) was fabricated by blending polymer-Pt(IV) complexes with PVDF. SEM, FTIR-ATR, contact angle, water flux and adsorption capacity were employed to characterize all membranes. Results indicated that the membrane, which was prepared using the copolymer with high P4VP content (polymerization time 10 h) as a functional polymer , N,N-dimethylacetamide as a solvent and PMMA- b -P4VP/PVDF ratio of 30 wt%, exhibited an intriguing morphology and much higher performance. Pt(IV)-IIM showed higher adsorption and selectivity for Pt(IV) (selectivity coefficients of 27.66 ± 1.38 and 77.16 ± 3.86 for Pt(IV)/Cu(II) and Pt(IV)/Ni(II), respectively) compared with a non-imprinted membrane. During membrane filtration, Pt(IV)-IIM was effective and selective for separation of Pt(IV) in the presence of Cu(II) and Ni(II) ions. Also, Pt(IV)-IIM was chemical stable, and had a good regeneration performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 42
·期 1
·118-128
·
IF 3.269
Jiuyun Cui,Yufeng Zhang,Yu Wang,Jiyang Ding,Penghu Yu,Yongsheng Yan,Chunxiang Li,Zhiping Zhou
With the increasing demand for lithium resources, it is of great significance to develop a new technology for the selective recovery of lithium from complex systems. In the present work, antifouling lithium-imprinted hybrid membranes (LIHMs) were fabricated through a hydrolysis polymerization method using a PVDF/GO hybrid membrane as a basement membrane, and polydopamine as an adhesion layer to anchor imprinted sites. The antifouling experiments demonstrated that LIHMs had the underwater oil contact angle of 152 ± 0.8°. Furthermore, the adsorption isotherms, permeation and adsorption kinetics of the LIHMs were researched in detail. The results displayed that LIHMs showed a distinctive adsorption capacity (27.10 mg g−1) and permselectivity (βK/Li = 5.3780, βCa/Li = 21.9402, βMg/Li = 15.5620) for lithium. Also, the regeneration experiments confirmed the good durability of LIHMs, favoring long-term use. Therefore, the LIHMs provided a powerful tool for the effective separation and recovery of lithium in practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Weiguo Pan,Li Chen,Yitan Wang,Yongsheng Yan
How to efficiently utilize the low-concentration rare earth wastewater has become an urgent demand for the sustainable mining and resource utilization of ion-type rare earth minerals in China. Herein, we developed Y ion-imprinted electrospun membranes (Y-IIEMs) for the selectively separation of neighboring heavy rare earth ion Y(III) from Ho(III) and Er(III) by applying high efficient ligand-inducing and aqueous phase ion-imprinting. Cyanex272 was applied as carrier in membrane matrix and also as high-efficient ionic ligand in imprinted layer. Thermal stability of Cyanex272 was greatly improved after pDA bionic adhesion and sol-gel aqueous phase imprinting. Water contact angle of Y-IIEMs was only 23.2° which was probably a combination result from all the polar groups P O and P–OH from Cyanex 272 ligand, the imino groups from pDA layer and the silicon hydroxyls from sol-gel imprinting. And the calculated static adsorption imprinting factor of Y(III) was more than 7 indicating that valid recognition sites were successfully formed. The separation factors β (Y/Ho) and β (Y/Er) in dynamic permeation process increased significantly from 1.24 and 0.85 for non-imprinting to 2.01 and 1.77 for imprinting membranes. After 8 cycles of dynamic permeation, Y-IIEMs’ flux decreased only 13.8%, which implied good stability and reuse performance.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Wendong Xing,Yongsheng Yan,Linli Xu
Molecularly imprinted membranes (MIMs) offer significant promises for advanced water treatment due to their targeted separation capabilities. However, achieving simultaneously high permeability and selectivity in the separation of low-concentration target substances remain a major challenge. Herein, we designed and constructed novel metal-organic framework (MOF)-based hierarchical porous MIMs (MHP-MIMs) through a strategy that optimizes pore structure in conjunction with a thin selective layer. A polydopamine (PDA)-assisted assembly technique was developed to efficiently modify heterogeneous porous MOFs into a porous polyvinylidene fluoride (PVDF) substrate. The resulting hierarchically structured pores, combined with the thin imprinted layer, not only facilitate the formation of denser and more numerous imprinting recognition sites but also ensure their accessibility while reducing mass transfer resistance. Notably, the selective separation performance of the prepared MHP-MIMs exhibits a significant anti-trade-off effect, meaning that both the selectivity and flux of the membrane are simultaneously enhanced. Furthermore, the hierarchically structured pores endow the MHP-MIMs with improved selective separation performance during continuous separation processes, achieving efficient selective separation of ppm-level atrazine (ATZ) in simulated actual samples, with a separation efficiency for ATZ of 49.86%. This proposed strategy provides novel insights for designing sophisticated MIMs to overcome the trade-off effect in the separation of low-concentration target substances.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2018
·
IF 2.732
Minjia Meng,Mengqi Bai,Zulin Da,Yanhua Cui,Bingrong Li,Jianming Pan
Selective fluorescent molecularly imprinted membrane (FMIM) for salicylic acid (SA) was successfully prepared by phase inversion technique with SA as template molecule, chitosan (CHI) as functional polymer , and Eu(TTA) 3 phen/PAMAM composed of Eu(TTA) 3 phen and the dendrimer (PAMAM) as the fluorophore, which was characterized by SEM, AFM, and XPS techniques. The introduction of the hydrophilic Eu(TTA) 3 phen/PAMAM into FMIM was able to improve the flux and the adsorption capacity of SA with good fluorescent stability. Among the FMIM, the FMIM2 prepared with 2.0% Eu(TTA) 3 phen/PAMAM in the cast membrane fluid was the optimal fluorescent imprinted membrane for selective detection of SA, which displayed a relatively wider linear range and lower limit of detection (LOD) (24 mg L −1 ). The imprinted FMIM2 could selectively detect the SA from complicated samples without obvious interference from analogues compared to the non-imprinted FNIM2. Moreover, the FMIM had promising recycling performance. It can be potentially used as an alternative imprinted membrane for selective detection and separation of trace SA in water.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 45
·5416-5422
·
IF 2.073
Ru Yao,Zhen Yu,Manman Wu,Haining Yu
A molecularly imprinted membrane (MIM) with teicoplanin (TE) as a template and other related material membranes (organic nylon microporous membranes, polyvinylidene fluoride (PVDF) membranes, and polypropylene membranes) as supports were synthesized for the selective absorption of TE. These membranes can be used for pretreatment of biological samples and rapid determination of TE. Our results showed that PVDF MIM exhibited the best selectivity among the other three synthesized membranes and therefore, it was used in this study. The performance of PVDF MIM was examined, including surface structure, adsorption capacity, desorption capacity, selective adsorption capacity, and recovery rate; the precision, stability, repeatability, linearity and recovery rate of this method were investigated at the same time. Clean-up and enrichment of samples by TE MIM were reliable.
研究领域:
药学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2014
·
IF 3.065
YiLin Wu,MinJia Meng,Xinlin Liu,Chunxiang Li,Min Zhang,Yanjun Ji,Fengquan Sun,Zhihui He,YongSheng Yan
Highly selective molecularly imprinted membranes (MIMs) for artemisinin (Ars) were synthesized by Atom Transfer Radical Polymerization using Activators Generated by Electron Transfer (AGET-ATRP) on the poly(vinylidene fluoride) (PVDF) micro-filtration membrane. The resulting membranes were characterized by ATR-FTIR and SEM. Batch rebinding studies were conducted to determine the adsorption equilibrium, kinetics and selective permeation performance. The estimated adsorption capacity of MIMs toward Ars by the Langmuir isotherm model was 3.46 mg g −1 at 25 °C. The kinetic property of MIMs was well-described by the pseudo-second-order rate equation. The results of selective recognition experiments demonstrated outstanding affinity and selectivity toward Ars over competitive antibiotics (artemether). The selective permeation experiments were investigated to prove the excellent selective permeation performance of MIMs. The reusability of MIMs showed no obviously deterioration at least five repeated cycles in performance.
研究领域:
化学工程
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药物化学
·
材料科学
✓ 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）