CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Baoying Wang,Ruirui Li,Zhenzhen Cui,Zihao Wang,Weicheng Fu,Junying Yan,Chenxiao Jiang,Liang Wu,Tongwen Xu,Yaoming Wang
Efficient separation of magnesium and lithium is essential for the extraction of lithium resources from salt-lake brines. However, the current membrane separation technologies are challenged by the membrane permeability-selectivity trade-off. Herein, we demonstrated a facile and practical approach to fabricate crown ether-functionalized polymeric membranes with excellent Li + /Mg 2+ separation performance by incorporating 12-crown-4 rings into the cellulose triacetate polymer network. The tightly and regularly arranged polymer chains anchored the crown ether rings firmly in the membrane structure, thereby facilitating the formation of stable and highly selective cation transport channels inside the membrane. As a result, the prepared membrane achieved an ultrahigh Li + /Mg 2+ separation factor of ∼872 and Li + flux of 22.6 μmol m −2 s −1 , which was much superior to that of commercial CIMS and reported membrane separation technologies. The good long-term stability of the fabricated membrane is promising for achieving efficient magnesium-lithium separation in large-scale industrial applications.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
Nuclear Engineering and Technology
·
2021
·
IF 2.341
Hao Wu,Tatsuya Kudo,Seong-Yun Kim,Misako Miwa,Shigeo Matsuyama
A porous silica-based adsorbent was prepared by impregnating the pores of a silica support with the extractant 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) and an additive agent 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C 2 mim + NTf 2 − ) as the materials to remove cesium(I) (Cs + ) ions from seawater. The as-prepared adsorbent showed excellent adsorption performance toward Cs + ions, with adsorption equilibrium reached within 2 h and an adsorption amount of 0.196 mmol/g observed. The solution pH, temperature, and the presence of coexisting metal ions were found to have almost no effect on Cs + adsorption. The adsorption mechanism was considered to proceed via ion exchange between Cs + and C 2 mim + . In addition, the particle-induced X-ray emission analysis results further clarified that the adsorbed Cs + ion species on the adsorbent was in the form of both CsCl and CsBr.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Lianjing Mao,Xiaolong Zhou,Tianyu Zheng,Xiao Li,Xiufang Wang,Zhiyu Zhao,Wei Sun,Pengrui Zhang,Jinhe Sun
The metal ion extraction process is usually accompanied by the removal of coordinated water molecules and the change of water content in the extraction phase. However, hierarchical methodologies on water research are incredibly sparse, restricting a thorough knowledge of the extraction mechanism. It was clarified the diversity of water occurrence forms in the extraction phase and quantitative relationship between water, Li + and crown ether based on the (B12C4/B15C5/B18C6-[EMIm][NTf 2 ])-LiNTf 2 solvent extraction system. While the complexation mechanism between hydrated Li + and crown ether was discussed carefully. Firstly, it demonstrated that the water content of the extraction phase: B18C6 > B15C5 > B12C4. Secondly, the water in the extraction phase is mainly collected by solvent and crown ether, with the latter catching water primarily via Li + coordination and weak interactions. In the end, focusing on the water captured by the crown ether through Li + coordination, slope analysis and DFT calculations found that Li (H 2 O) 4 + was removed three water molecules to complex with B12C4 or B15C5, whereas B18C6 tends to remove two water molecules. It is precious for a thorough grasp of the mechanism and procedure of Li + extraction by crown ethers. What’s more, it offers novel strategies for investigating water content and transfer mechanisms in extraction systems.
研究领域:
化学
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材料科学
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理论研究
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Xianli Huang,Dongmei Zhuang,Zhihui Chen,Hao Gong,Tao Wang,Jianping He,Xiaogang Zhang
It is so far an efficient way for depressing dendrite growth to adjust the electrolyte composition . Therefore, we study the electrochemical behavior of lithium metal electrodeposited in a LiPF 6 -propylene carbonate (PC) electrolyte by adding two kinds of crown ether . The effect of crown ether concentration on the Coulombic efficiency of lithium electrodes has be evaluated, and the electrodeposition behavior of lithium metal on negative electrode has be analyzed by cyclic voltammetric curve, electrodeposition curve and lithium metal deposition morphology. The results show that a certain amount of crown ether (15-crown-5 and 12-crown-4) can preferentially coordinate with lithium ion in the electrolyte and form complex compounds, which reduce the lithium ions concentration in the “hot spot” and level the lithium electrode greatly by inhibiting the preferential growth of lithium dendrite . A uniform and dense nano-columnar lithium layer could be obtained at the current density of 2.0 mA cm −2 when the deposition amount is 1.0 mAh cm −2 , and the concentration of 15-crown-5 and 12-crown-4 ether are 0.3 M and 0.2 M, respectively. Gaussian calculation results show that the lithium-crown complex has a relatively lower lowest unoccupied molecular orbit (LUMO), where electrons could be injected during the charging process, leading to decreased Coulumbic efficiency.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
AICHE JOURNAL
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2020
·Vol. 67
·期 6
·e17173
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IF 3.519
Liang Shen,Ming Yi,Susilo Japip,Chao Han,Lian Tian,Cher Hon Lau,Yan Wang
In this study, we deployed a modified interfacial polymerization process to incorporate multifunctional crown ethers (CEs) into thin-film composite (TFC) polyamide membranes. CE additives acted as both the phase-transfer catalyst and co-solvent to facilitate the diffusion of amine monomers into the organic phase via interacting with amine monomers (form the host-guest inclusion complex), and enhanced the free volume content of the selective layer, therefore facilitating water transport and inhibiting the diffusion of salt ions. Various characterization techniques were employed to elucidate the modification mechanism as a function of CE chemical and physical properties on the microstructure of resultant TFC membranes and consequently separation performances. Compared to TFC membranes produced from traditional interfacial polymerization method, CE-modified membranes exhibited a 146% water flux enhancement and 59% lower reverse salt fluxes with a suitable draw solution. CE-modified membranes also showed the improved antifouling behavior and chemical stability in various harsh conditions.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2020
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IF 2.029
Mingyong Wang,Jinhe Sun,Pengrui Zhang,Chaochi Huang,Qian Zhang,Fei Shao,Yan Jing,Yongzhong Jia
Lithium-6 and lithium-7 with high abundance can be used in fusion ( 6 Li > 30%) and fission ( 7 Li > 99.9%) respectively. Lithium isotope separation with nature abundance always inspires people's interest. In this work, lithium isotope separation by electromigration from lithium-loaded organic phase to aqueous solution was investigated. It was found that immigrant lithium ions in aqueous solution enriched lithium-7 at 1.5 V and enriched lithium-6 at 20 V. After electromigration, the lithium isotope value in aqueous solutions could reach −21.5. The results confirmed the isotopic separation effect of lithium ions electromigration which attributed to dissociating difference of lithium isotopic ions-crown ethers complex.
研究领域:
化学
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核科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Xue Bai,Jiangdong Dai,Yue Ma,Weibai Bian,Jianming Pan
It is highly desirable to develop an efficient adsorbent with large capacity, high selectivity and fast kinetics to recovery virtually inexhaustible lithium ion (Li + ) resources from salt lake brine. In this work, 2-(allyloxy) methylol-12-crown-4 ether (2AM12C4) functionalized polymer brushes (PVBC-g-PCE) from macroporous polymeric high internal-phase emulsion (PolyHIPE) using UV-initiated surface polymerization are synthesized for selectively recovery of Li + . PVBC-g-PCE possesses the advantages of strong physical strength, high density of accessible binding sites, and the size of highly permeatable voids and interconnecting pores is about 8.0–18 µm and 3.3–4.8 µm, respectively, which is a favorable adsorbent for specific capture Li + . PVBC-g-PCE has a maximum capacity at pH 6.0, and the pH-dependent adsorption amount suggests the grafted polymer brushes of 2AM12C4 is the driving force to enhance binding performance. PVBC-g-PCE has a fast adsorption equilibrium within 45 min, and the kinetic results are well-described by the pseudo-second-order model, indicating the specific host-guest interaction between functionalized 2AM12C4 and Li + is the main adsorption mechanism. Moreover, the maximum monolayer binding amount of PVBC-g-PCE is 4.43 mg g −1 , and the strong affinity in the presence of four kinds of interfering ions (i.e. Na + , K + , Mg 2+ , and Ca 2+ ) is also observed, which can also be proved by the high relative selectivity separation coefficient ( α r ) between 3.16 and 7.98. It is expected that this PVBC-g-PCE with abundant easy-to-access specific recognition sites can be applied as a promising adsorbent for effective separation of Li + .
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
MATERIALS & DESIGN
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2021
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IF 7.991
Long Pang,Haohui Feng,Wei Zhong,Haonan Dong,Youqing Shen,Bing Yu,Hailin Cong
Chemotherapy is one of the most used method for cancer therapy, however, brings huge pain to patients as the drugs commonly causes side effects. Inducing tumor cells apoptosis by perturbing ion homeostasis is a novel approach to replace chemotherapy in recent years. Crown ether has been widely used since it was discovered in the last century and has shown its potential in biological applications. The aim of this paper is to design a series of novel nanometer micelles with crown ether on their surface. Crown ether was connected to a commonly used amphiphilic polymeric carrier, PEG-PCL, through ester bond (CPMs). Micelles about 120 nm in diameter were formed in aqueous solution. The micelles could capture potassium ions prominently in both aqueous solution and tumor cells. In vitro and in vivo experiments showed that the CPMs had certain anti-tumor activity, indicating that the CPMs had anti-tumor potential.
研究领域:
药学
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生物化学
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肿瘤学
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产品关联
DOI
高影响因子
SUPRAMOLECULAR CHEMISTRY
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2011
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IF 1.94
Jing Cao,Jun Xiang Feng,Yong Xiang Wu,Xue Qun Pei,Jiao Jiao Yan,Yang Liu,Wen Jie Qin,Xiao Bin Zhang
A novel 15-aza-5-crown ether linked to styryl chemosensory 13-(4-((9H-fluoren-9-ylidene)methyl)-2-nitrophenyl)-1,4,7,10-tetraoxa-13-azacyclopentadecane was designed and synthesised, it would not occur during photoisomerisation under radiation of light but shows special capability of selectively recognising for Sr2+.
研究领域:
化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Haiyan Zhou,Ying Dai,Di Zhang,Jesse Daniel,Xing Zhong,Zhuyao Li,Qinqin Tao,Lei Xu
A novel chitosan (CTS) - based composite material, CTS/B18C6/B21C7, has been developed through the Schiff base reaction, incorporating two distinct crown ether ligands - aldehyde-benzo-18-crown-6 (B18C6) and aldehyde-benzo-21-crown-7 (B21C7). This design enables efficient and selective adsorption of cesium and strontium. The material features two recognition sites of exclusive affinity, enhancing selective adsorption through the matching cavity sizes of the crown ethers with Sr 2+ and Cs + . The structure and surface properties were characterized using SEM, TG, FT-IR and XPS confirming the successful Schiff base reaction and effective material synthesis. Adsorption experiments revealed that CTS/B18C6/B21C7 exhibited strong affinity and high adsorption capacity for Sr 2+ and Cs + . Under strong acid conditions (pH < 1), the adsorption strength increased, and higher acidity further enhanced adsorption capacity, indicating that electrostatic and other interactions play significant roles in the adsorption process. The Sips isothermal model was more suitable for describing this adsorption process, with maximum adsorption capacities of 172.11 mg/g for Cs + and 132.23 mg/g for Sr 2+ determined. These findings highlight the potential application of CTS/B18C6/B21C7 in treating radioactive nuclides.
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
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Wenran Wang,Xin Peng,Jianxin Zhang,Rong Huang,Huishi Guo,Zhenxiao Pan,Huashang Rao,Xinhua Zhong,Guizhi Zhang
Interface engineering strategies passivate defects on the polycrystalline perovskite film surface and improve the stability of corresponding perovskite solar cells (PSCs). However, a single interface engineering step can result in restricted benefits on various occasions. Therefore, an appropriate additional modification step can be necessary to synergistically improve the device performance. In this study, a two-step interface engineering strategy is developed. Initially, the CsPbI3 perovskite surface is modified by choline iodide (ChI) to construct a 1D ChPbI3/3D CsPbI3 heterojunction, and then an additional surface modification step with the use of crown ether is applied. The crown ether modification can further eliminate unpassivated surface defects after heterojunction construction. Benefiting from the inhibited interfacial recombination, the resultant carbon-electrode-based CsPbI3 PSCs (C-PSCs) deliver a champion efficiency of 18.78%, representing one of the highest levels in this field. Besides, crown ether can synergistically improve the stability of the device against moisture, heat, and light stress due to the enhanced hydrophobicity and suppressed ion migration.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Junyuan Hua,Feidong Yang,Jintao He,Jiahui Du,Bo Dong,Xiaohua Ma,Jianxin Li
A great challenge is to develop suitable techniques to extract Li + resources from low-grade salt-lake brines with high Mg/Li ratios. In this study, an efficient ternary extraction system has been constructed using tributyl phosphate (TBP) and crown ether (CE) as the extractant and sodium bistrifluoromethylsulfonimide (NaNTf 2 ) as the auxiliary extractant to extract Li + . Results showed that the single-stage E Li % and SF Li-Mg were up to 74.1 % and 757, respectively, when the O/A was 1, 0.02 mol/l Li + and 0.232 mol/l Mg 2+ . It is noteworthy that the elution of Li + was also as high as 100 % at an O/A volume ratio of 5, when 0.5 mol/l HCl was used as the counter-extractant to recovery Li + . The NMR and FTIR analysis and molecular dynamics (MD) and density functional theory (DFT) revealed that the exceptional performance of the three-component extraction system was attributed to the optimal matching between the diameter of Li + and the cavity size of the CE, as well as the strong affinity exhibited by CE, TBP, and NTf 2 − towards Li + . Specifically, the 2TBP-LiNTf 2 -CE-LiNTf 2 complex structure with the highest binding energy displayed the most structure. In summary, this work paves the way for the recovery of Li + from low-grade salt-lake brine.
研究领域:
化学工程
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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）