JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Jiang Xiao,Yongzhong Jia,Chenglong Shi,Xingquan Wang,Su Wang,Ying Yao,Yan Jing
A green and efficient liquid–liquid extraction system was developed for the separation of lithium isotopes by using hydrophobic ionic liquids (ILs = [C 4,6,8,10 mim] + [NTf 2 ] − ) as extraction organic phase and benzo-15-crown-5 (B15C5) as complexing agent. The maximum single-stage separation factor α of 6 Li/ 7 Li obtained in this study was 1.029 ± 0.001, indicating 6 Li was enriched in ionic liquid phase while 7 Li was concentrated in the aqueous phase. The lithium ion was extracted into the ionic liquid in the formation of 1:2 complex [Li + (B15C5) 2 ]. The negative data of thermodynamic parameters (∆ H 0 and ∆ G 0 ) suggest that the extraction system was a spontaneous exothermic process . In addition, effective lithium isotopes separation factor and the extraction efficiency of lithium ions can be gained in the condition of lower temperature with softer counter anions in the novel extraction system.
研究领域:
化学
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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
·
2022
·
IF 6.633
Pengrui Zhang,Ciming Wang,Zixuan Xue,Lianjing Mao,Jinhe Sun,Fei Shao,Mixiang Qi,Yan Jing,Yongzhong Jia
Controlled fusion energy is considered to be one kind of sustainable energy source with clean and green properties. The fusion process requires a large number of lithium isotopes, but the naturally stable lithium isotopes 6 Li and 7 Li cannot be directly applied to the fusion process and must be further enriched. In this paper, a system for the separation of lithium isotopes by extraction was investigated, which mainly consists of bromobenzene-15-crown-5 and ionic liquids. The effects of ionic liquids, lithium salts, crown ether concentration, and temperature on the separation performance of lithium isotopes were explored. It was found that 6 Li was enriched in the organic phase and the single-stage separation factor reached 1.032. It was proved by the temperature experiment that the exchange of lithium isotopes was a spontaneous and exothermic process. The complexation ratio of crown ether and lithium ions was 1:1. The optimized complexation model and the interaction of crown ether and lithium ions were calculated by DFT and Multiwfn. Lithium ions were weakly bonded to the crown ether and strongly bonded to the water molecule as demonstrated by the non-bonded interactions and Mayer bond order of Li-O. Meanwhile, the mechanism of lithium isotope separation with crown ether was clarified by mutual verification of experiment and theoretical calculations.
研究领域:
核科学
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物理化学
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2019
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IF 4.561
Wenbo Zhu,Yongzhong Jia,Jinhe Sun,Pengrui Zhang,Fei Shao,Yan Jing
A novel synergistic extraction system was studied for the separation of lithium isotopes using lithium salts solution as aqueous phase and dichloromethane containing 4′-acetylbenzo-15-crown-5 and [BMIm][NTf 2 ] as organic phase with solvent extraction method . The key factors such as anions of lithium salts, concentrations of LiNTf 2 , initial pH values of aqueous phase, solvents, volume ratio of dichloromethane and [BMIm][NTf 2 ] were investigated in this study. Results showed that the maximum extraction rate of lithium was 68.36% and the maximum single stage separation factor of 6 Li and 7 Li was 1.056 ± 0.002. The formed complex in organic phase was studied by the slope analysis method, which indicated that the complex was composed of Li-ion and 4′-actylbenzo-15-crown-5 by 1:1. The thermodynamic parameters of the 6 Li and 7 Li exchange reaction were calculated by data obtained on temperature during experiments, which explained that the exchange behavior of 6 Li and 7 Li in this system was a spontaneous exothermic reaction . In addition, this system was able to efficiently separate lithium isotopes at lower temperature.
研究领域:
化学
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核科学与技术
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
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IF 2.74
Jiang Xiao,Yongzhong Jia,Chenglong Shi,Xingquan Wang,Ying Yao,Yan Jing
A novel liquid–liquid extraction system was investigated for the selective separation of lithium isotopes using ionic liquids (ILs = [C 6,8,10,12 mim] + [PF 6 ] － ) as extraction solvent and benzo-15-crown-5 (B15C5) as extractant. The effects of the concentration of lithium salt , counter anion of lithium salt, initial pH of aqueous phase, and extraction temperature on the lithium isotopes separation were studied. The maximum single-stage separation factor α of 6 Li/ 7 Li obtained in the present study was 1.038 ± 0.002, indicating the lighter isotope 6 Li was enriched in organic phase while the heavier isotope 7 Li was concentrated in the aqueous phase. The formation of 2:1 complex Li(B15C5) 2 + in the IL phase was determined on the basis of slope analysis method. The large value of the free energy change (− G 0 = 77.87 J mol −1 ) indicated the high separation capability of the lithium isotopes by B15C5/30%CH 3 Cl-70% C 6 mimPF 6 mixture extraction system. Lithium in Li(B15C5) 2 + complex was stripped by 0.5 mol·L −1 HCl solution. The extraction system offers high efficiency, simplicity application prospect to separation lithium isotope separation from LiCl solution.
研究领域:
化学
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材料科学
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核化学
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分析化学
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DOI
高影响因子
Small
·
2024
·Vol. 20
·期 48
·2405528
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IF 13
Lunyao Pan,Xiankan Zeng,Yuanxiao Qu,Maolin Mu,Shiyu Yang,Yongjian Chen,Chenglong Li,Linzhu Dai,Li Tao,Hongqiang Xin,Wen Li,Weiqing Yang
Cu 2 ZnSnS 4 (CZTS) is strong candidate for hole transport in perovskite light emitting diodes (PeLEDs) due to their cost-effectiveness, deep highest occupied molecular orbital (HOMO), and high hole mobility. However, its inherent polymetallic ions usually deteriorate the quality of the perovskite emission layer (EML) affecting device performance. In this study, a bidirectional anchoring strategy is proposed by adding 15-crown-5 ether (15C5) into CZTS hole transport layer (HTL) to suppress the reaction between HTL and EML. The 15C5 molecule interacts with Cu + , Zn 2+ and Sn 2+ cations forming host–guest complexes to impede their migration, which is elucidated by density functional theory calculations. Additionally, 15C5 can neutralize lead (Pb) defects by the abundant oxygen (O) and high electronegative cavities to reduce the nonradiative recombination of FAPbBr 3 film. This bidirectional anchoring strategy effectively improves hole charge transport efficiency and suppresses nonradiative recombination at the HTL/EML interface. As a result, the optimized PeLEDs present a 3.5 times peak external quantum efficiency (EQE) from 3.12% to 11.08% and the maximum luminance ( L max ) increased from 24495 to 50584 cd m −2 . These findings offer innovative insights into addressing the metal ion migration issue commonly observed in inorganic HTLs.
研究领域:
材料科学
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光电子学
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半导体物理
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hongwei Li,Ying Wang,Tingyu Li,Xiang-Kui Ren,Jixiao Wang,Zhi Wang,Song Zhao
Lithium extraction from salt lake brines with high Mg 2+ /Li + ratios represents an effective alternative for tackling the scarcity of lithium resources. In this work, nanofiltration (NF) membrane with exclusive Li + transport channels was designed and prepared through facile interfacial polymerization, in which polyethyleneimine (PEI) bonded with 15-crown-5 ether (15C5) through hydrogen interaction was selected as the aqueous monomer ( [email protected] ) and reacted with trimesoyl chloride (TMC). The channels generated by 15C5 molecules could facilitate Li + transport owing to their affinity to Li + . Molecular dynamics simulation was conducted to further confirm the Li + transport through [email protected] membrane with exclusive Li + transport channels provided by 15C5. The [email protected] membrane displayed a permeability of 8.0 L·m −2 ·h −1 ·bar −1 and stable separation factor ( S Li,Mg ) of 14, which could reduce Mg 2+ /Li + mass ratio of a simulated brine from 20 to 1.7. Furthermore, a three-stage NF process was designed and performed using a [email protected] membrane to separate a simulated salt lake brine, containing multiple ions and Mg 2+ /Li + mass ratio of 50. After the treatment, the ultimate permeate solution of the third stage contained 24 ppm of Li + and 2.7 ppm of Mg 2+ with Mg 2+ /Li + mass ratio of 0.1. Therefore, this process could be applied to obtain Li 2 CO 3 products with high purity. Our investigation highlights the highly efficient Mg 2+ /Li + separation through NF membranes with exclusive Li + transport channels, potentially applicable to lithium extraction from salt lake brines with high Mg 2+ /Li + mass ratios.
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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膜技术
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Li Cui,Ren Gao,Qiaowei Zhang,Kun Jiang,Hongyan He,Wei-Lu Ding,Fangqin Cheng
Crown ethers (CEs) are promising materials for lithium isotope (6Li and 7Li) separation for their unique cavity structure and size effect, but the low partitioning of Li+ makes the practical implementation not applicable. The loss of CE molecules is also a critical problem. In this work, benzo-15-crown-5 functionalized imidazolium ionic liquids with different alkyl chain lengths ([Cn(B15C5)mim][NTf2], n = 6, 8, 10) are synthesized. The association constants of [Cn(B15C5)mim][NTf2] and Li+, Li+ partition, and the separation factor of 6Li and 7Li using [Cn(B15C5)mim][NTf2] were investigated. Compared with the B15C5 monomer, the covalent bonding of B15C5 onto the cation of imidazolium ILs contributes to the dramatic increase of binding ability toward Li+. The association constants of [Cn(B15C5)mim][NTf2] with Li+ increase with the elevation of the alkyl chain length due to the flexibility changes. However, [C8(B15C5)mim][NTf2] delivers the most outstanding partition coefficient of Li+ up to 7.59 with a separation factor of 1.033 (273 K), exceeding those reported for CE-based materials. The increased hydrophobicity of [Cn(B15C5)mim][NTf2] enables sustainable and robust use in the separation process. Both molecular dynamics simulations and interfacial tension experiments confirm that [C8(B15C5)mim][NTf2] exhibits the best affinity to the interfaces of dichloroethane/water. The coordination environment of Li+ can be tuned by regulating the length of the alkyl chains, resulting in different isotopic effects. This study offers a promising system for the effective and sustainable separation of 6Li and 7Li.
研究领域:
材料科学
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化学工程
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分析化学
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产品关联
DOI
高影响因子
Soft Matter
·
2023
·Vol. 19
·期 26
·4880-4890
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IF 3.4
Yan-Lin Wang,Xi Wang,Hai-Rong Yu,Ting Liang,Xing-Bin Lv,Chang-Jing Cheng
Potassium ions (K+) play crucial roles in many biological processes. Abnormal K+ levels in the body are usually associated with physiological disorders or diseases, and thus, developing K+-sensitive sensors/devices is of great importance for disease diagnosis and health monitoring. Herein, we report a K+-sensitive photonic crystal hydrogel (PCH) sensor with bright structural colors for efficient monitoring of serum potassium. This PCH sensor consists of a poly(acrylamide-co-N-isopropylacrylamide-co-benzo-15-crown-5-acrylamide) (PANBC) smart hydrogel with embedded Fe3O4 colloidal photonic crystals (CPCs), which could strongly diffract visible light and endow the hydrogel with brilliant structural colors. The rich 15-crown-5 (15C5) units appended on the polymer backbone could selectively bind K+ ions to form stable 2 : 1 [15C5]2/K+ supramolecular complexes. These bis-bidentate complexes served as physical crosslinkers to crosslink the hydrogel and contracted its volume, and thus reduced the lattice spacing of Fe3O4 CPCs and blue-shifted the light diffraction, and finally reported on the K+ concentrations by a color change of the PCH. Our fabricated PCH sensor possessed high K+ selectivity and pH- and thermo-sensitive response performances to K+. Most interestingly, the K+-responding PANBC PCH sensor could be conveniently regenerated via simple alternate flushing with hot/cold water due to the excellent thermosensitivity of the introduced PNIPAM moieties into the hydrogel. Such a PCH sensor provides a simple, low-cost and efficient strategy for visualized monitoring of hyperkalemia/hypokalemia, which will significantly promote the development of biosensors.
研究领域:
生物传感器
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材料科学
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Nano Today
·
2023
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IF 17.4
Fanqi Liu,Chang Guo,Xindi Li,Yumin Li,Suying Xu,Tony D. James,Leyu Wang
A stepwise morphologic transformation is highly desirable but rarely reported for promoting drug penetration at tumor sites via reducing transport barriers. Herein, an adhesive multifunctional nano-transformer (CTMF NPs) with cascading structural transformation was constructed, which afforded tumor microenvironment (TME)-activatable zero-background 19 F-magnetic resonance imaging and ratiometric photoacoustic imaging-guided synergistic tumor therapy. CTMF NPs were synthesized via a one-pot encapsulation and dynamic coordination strategy, where copper sulfide nanoparticles (CuS NPs, photothermal agent) were co-encapsulated with perfluoro-15-crown-5-ether (PFCE, 19 F MRI agent) by the dopamine grafted amphiphilic polymer, followed by coating with metal (Mn 2+ )-polyphenol shell ( 19 F signal quencher and therapeutic agent). Benefiting from polyphenol enhanced cell adherence as well as in situ generated reactive quinone , the CTMF NPs attached to tumor sites and exhibited efficient internalization under TME promoted decomposition and oxidation . Moreover, these nano-platforms were further decomposed under laser irradiation , which amplified cellular oxidative stress , leading to mitochondrial structural damage and dysfunction, as well as facilitating cuproptosis by interfering with the lipoylated tricarboxylic acid cycle . Cell apoptosis subsequently resulted in significant immunogenic cell death and afforded a versatile nano-transformer for precise imaging-guided bladder cancer therapy.
研究领域:
纳米技术
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癌症研究
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医学成像
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诊疗学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Ting Qi,Xiaona Wei,Xianfu Chen,Tiandan Lu,Dongliang Jin,Jing Zhong
Nanofiltration (NF) membranes are emerging as promising candidates for lithium extraction. However, their performance is challenged by the comparable physicochemical characteristics of Li + and Mg 2+ . In this work, a dual-reinforcement strategy is proposed to simultaneously enhance both selectivity and permeability by combining the densification of the polyamide (PA) network and the construction of Li + -selective transport channels. During the interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC), the cross-linking density of the PA layer is increased by adding sodium dodecyl sulfate (SDS), while Li + -selective transport nanochannels are constructed by incorporating 15-crown-5 ether (CE). This synergistic modification enhances Mg 2+ rejection via intensified size exclusion and facilitates Li + permeation through ion-specific recognition. The resulting PIP/SDS/CE-PA membrane exhibits a high cross-linking degree of 91.26 %, a reduced pore size of 0.70 nm, and a narrow pore size distribution (σ = 1.22). Molecular dynamics simulations confirm the preferential complexation of CE with Li + , and that Li + exhibits faster and more favourable translocation in the PIP/SDS/CE-PA membranes, thereby facilitating its selective transport. Experimentally, the membrane achieves a high MgCl 2 rejection of 97.1 % and a low LiCl rejection of 56.7 %, yielding an exceptional Li + /Mg 2+ selectivity of 30 in a MgCl 2 /LiCl binary system, while maintaining a water permeance of 5 L m −2 h −1 bar −1 . These findings demonstrate the strong potential of the PIP/SDS/CE-PA membrane for the direct treatment of high Mg 2+ /Li + ratio salt-lake brines and offer a versatile strategy for designing next-generation NF membranes for selective ion separations.
研究领域:
材料科学
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膜技术
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分离科学
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环境工程
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能源材料
✓ 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）