JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Kuo Chen,Feiyang Li,Tao Wei,Hengyu Zhou,Tengfang Zhang,Shengchao Zhao,Tengteng Xie,Haixiang Sun,Peng Li,Q. Jason Niu
The Mg 2+ /Li + screening selectivity determines the practical application of nanofiltration technology in lithium extraction from salt-lake brines and industrial lithium production. In this work, a membrane structure design strategy based on the interlayers was developed to prepare nanofiltration (NF) membranes with high Mg 2+ /Li + separation selectivity and high permeability. Through investigating the influence of the interlayer charge on the structure and performance of the NF membrane, the interlayer for the preparation of the NF membrane with high Mg 2+ /Li + separation selectivity was screened. Relevant characterizations indicate that the positively charged interlayer can endow the NF membrane with appropriate pore size and surface charge density to achieve high Mg 2+ /Li + separation selectivity through the synergistic effect of size sieving and Donnan exclusion. Moreover, the pore size of the NF membrane is controlled by the release rate of the piperazine (PIP) from the interlayer, while the surface charge density of the NF membrane is jointly determined by the charge of the interlayer and PA layer. The performance evaluation suggests that the NF membrane prepared with the best screened interlayer has a Mg 2+ /Li + separation factor up to 88.6 while maintaining a high permeability (22.5 L m −2 h −1 ·bar −1 ), which is better than that of the most membranes reported in the literature. Overall, this work is expected to promote the practical application of NF membranes in lithium extraction from salt-lake brines and industrial lithium production.
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
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产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Xintong Li,Yongna Guo,Xin Ma,Chao Zhang,Jia Yang,Shuai Wang
Herein, a series of α -hydroxyalkyl phosphinic acids were designed and first introduced in Mn 2+ extraction and Mn 2+ -Mg 2+ separation. The extraction tests indicate that the α -hydroxy-2-ethylhexyl phosphinic acid ( α -H-2-EHA) possesses superior extraction ability compared to di-2-ethylhexyl phosphinic acid (P204) for Mn 2+ and Mg 2+ , and the partition coefficient ( β ) is 28.2 at a saponification ratio of 30%. The results of quantum chemical calculation, FT-IR spectrum and slope analysis method reveal that the α -H-2-EHA can form stable four-membered ring structure with metal ions during the extraction process through P–OH and P O bonds. Furthermore, the HOMO composition results suggest that α -OH might also promote the interaction between extractant and metal ions. Finally, a three-stage countercurrent extraction—washing—stripping process was proposed and Mn 2+ can be enriched from 11.2 g/L to 36.6 g/L, with Mg 2+ decreased from 30.3 g/L to 0.6 g/L, which provides an efficient strategy for the preparation of high-purity manganese.
研究领域:
化学工程
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分析化学
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材料科学
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产品关联
DOI
高影响因子
BIOTECHNOLOGY LETTERS
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2017
·Vol. 39
·期 8
·1175-1181
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IF 1.73
Zhou Youzhi,Liu Ke,Zhang Jinsong,Chu Jianlin,He Bingfang
Objective To improve the stability of β-galactosidase from Bacillus megaterium YZ08 (BMG) in aqueous hydrophilic solvents and promote its application in the galactosylation of natural products. Results The addition of 5 mM Mg 2+ significantly enhanced the stability of BMG in aqueous hydrophilic solvents, and the half-lives of BMG in these solutions reached 56 min to 208 h, while they were only 7 min to 5.9 h without addition of Mg 2+ . Studies on the kinetic parameters in buffer solution and 30% dimethyl sulfoxide (DMSO) indicated that the affinity of BMG to 2-nitrophenyl-β- d -galactopyranoside and its catalytic efficiency ( κ
cat / K
m ) increased with the addition of Mg 2+ . Furthermore, the addition of Mg 2+ facilitated galactosylation reactions in 30% DMSO and increased product conversions by 24–41% due to the reversal of the thermodynamic equilibrium of hydrolysis. Conclusion A convenient approach was established to improve the stability of BMG in aqueous hydrophilic solvents.
研究领域:
酶学
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生物催化
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生物化学
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有机化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
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IF 3.9
Yu Tang,Shengde Dong,Junjie Shan,Ping Li,Ying Cheng,Leya Guo,Yin Xiang,Yanxia Sun,Qi Xu,Chunxi Hai,Haijiao Xie,Yuan Zhou
The burgeoning energy sector exhibits a demand for lithium resources. Notably, salt lakes, rich in lithium, challenge due to the high Mg2+/Li+ ratios encountered. Nanofiltration, characterized by its simplicity, environmental sustainability, holds promising prospects for Mg2+/Li+ separation in salt lakes. Density functional theory (DFT) simulations reveal that sodium dodecyl sulfate (SDS) surfactant layers significantly lower the energy barrier for polyethylenimine (PEI) transfer, which fundamentally enhances the interfacial polymerization kinetics. This study activates polysulfone (PSF) ultrafiltration (UF) membrane surfaces with SDS surfactants to form a negatively charged surface-active interlayers, the hydrophilicity of the membrane surface was increased and then accelerating polymerization at the PEI/TMC interface. Under optimized conditions, the membranes achieve 98.6% MgCl2 retention and ultrahigh selectivity (S(Li/Mg) = 118.75) with a Mg2+/Li+ ratio of 50:1, showing sustained performance in a 44 h test. This work provides efficient separation method for high-performance lithium extraction from salt lake brines.
研究领域:
膜科学
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化学工程
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材料科学
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分离技术
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计算化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
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2024
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IF 6.1
Na Li,Yi Cao,Jingyi Liu,Wen Zou,Manyu Chen,Hongfu Cao,Siyan Deng,Jie Liang,Tun Yuan,Yujiang Fan,Qiguang Wang,Xingdong Zhang
The management of chronic infected wounds poses significant challenges due to frequent bacterial infections, high concentrations of reactive oxygen species, abnormal immune regulation, and impaired angiogenesis. This study introduces a novel, microenvironment-responsive, dual dynamic, and covalently bonded hydrogel, termed OHA-P-TA/G/Mg2+. It is derived from the reaction of Tannic acid (TA) with Phenylboronic acids (PBA), which are grafted onto oxidized hyaluronic acid (OHA-P-TA), combined with GelMA (G) via Schiff base and chemical bonds, and incorporates Mg2+. This hydrogel exhibits pH and ROS dual-responsiveness, demonstrating effective antibacterial capacity, antioxidant ability, and the initiation of inflammation under distinct acidic and oxidative microenvironments. Furthermore, the release of Mg2+ from the TA-Mg2+ network (TA@Mg2+) promotes the transformation of pro-inflammatory M1 phenotype macrophages to anti-inflammatory M2 phenotype, showing a microenvironment-responsive response. Finally, in vivo results indicate that the OHA-P-TA/G/Mg2+ hydrogel enhances epithelial regeneration, collagen deposition, and neovascularization, showing great potential as an effective dressing for infected wound repair.
研究领域:
材料科学
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生物医学工程
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伤口愈合
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药剂学
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产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 15
·e202300403
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IF 8.4
Han Tang,Feiyang Chao,Hongyu Luo,Kesong Yu,Juan Wang,Huibiao Chen,Runmin Jia,Fangyu Xiong,Yuqiang Pi,Ping Luo,Qinyou An
Graphical The preinserted Mg 2+ ions effectively improve the reaction kinetics and structural stability of NH 4 V 4 O 10 (NHVO) in aqueous zinc-ion batteries. Compared with pristine NHVO, the intrinsic conductivity and the specific capacity after 6000 cycles of Mg-NHVO are improved by 5 times. DFT calculation reveals that the preinserted Mg 2+ ions introduce the overlap of electron cloud with vanadium oxygen layer which improve the density of states of Mg-NHVO in Fermi level. Aqueous zinc-ion batteries (AZIBs) attract much attention owing to their high safety, environmentally friendliness and low cost. However, the unsatisfactory performance of cathode materials is one of the unsolved important factors for their widespread application. Herein, we report NH 4 V 4 O 10 nanorods with Mg 2+ ion preinsertion (Mg-NHVO) as a high-performance cathode material for AZIBs. The preinserted Mg 2+ ions effectively improve the reaction kinetics and structural stability of NH 4 V 4 O 10 (NHVO), which are confirmed by electrochemical analysis and density functional theory calculations. Compared with pristine NHVO, the intrinsic conductivity of Mg-NHVO is improved by 5 times based on the test results of a single nanorod device. Besides, Mg-NHVO could maintain a high specific capacity of 152.3 mAh g −1 after 6000 cycles at the current density of 5 A g −1 , which is larger than that of NHVO (only exhibits a low specific capacity of 30.5 mAh g −1 at the same condition). Moreover, the two-phase crystal structure evolution process of Mg-NHVO in AZIBs is revealed. This work provides a simple and efficient method to improve the electrochemical performance of ammonium vanadates and enhances the understanding about the reaction mechanism of layered vanadium-based materials in AZIBs.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
TALANTA
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2022
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IF 6.556
Lv Yuxiong,Sun Yingying,Liu Wenjie,Yu Jianna,Jing Guoxing,Liu Wen,Xia Huaiyue,Li Dongyan,Li Wenshan
Detection of ultralow concentration of tetracycline (TC) plays a key role in food safety and human health. Herein, we fabricated an enzyme-free dual-amplification assay for sensitive detection of TC in milk. The sensing system ingeniously combined Mg 2+ -dependent DNAzyme (MNAzyme) cleavage and catalytic hairpin assembly (CHA). Through the binding of TC and specific aptamer (Apt), DNA1 was released from the Apt-DNA1 complex. Then the separated DNA1 would hybridize with DNA2 to activate the catalytic activity of MNAzyme, which subsequently cleaved the substrate H0 and generated a new unit to trigger the following CHA reaction between H1 and H2, thereby releasing the G-rich sequence of H1 to induce the formation of G-quadruplex–hemin DNAzyme as a colorimetric signal readout. Under optimal conditions, the absorption intensity exhibited a significant linear correlation with the logarithm of the target TC concentration over a range of 4 orders of magnitude dynamic range from 1 pM to 10 nM. The limit of detection was calculated to be 0.89 pM and the method showed high selectivity for TC. More impressively, the proposed method was employed for TC determination in the milk sample.
研究领域:
分析化学
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食品科学
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生物技术
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Mengyue Liu,Kexin Wan,Xinmiao Zhang,Mingkun Wang,Dawei Yang,Jishi Wei,Kun Chang,Hongwei Tang
NASICON-type cathodes as promising candidates have attracted more and more attention, and Na 3 V 2 (PO 4 ) 3 is one of the outstanding representatives. In particular, it can tolerate complex interface reaction processes during the Zn 2+ insertion/desertion in the aqueous environment. However, existing three-dimensional channels in the intrinsic Na 3 V 2 (PO 4 ) 3 always hardly play to their advantages as narrow pathways and some other defects. This work has considered both the conductivity and capacity of this vanadium-based NASICON cathode at the same time, where a sodium-rich cathode material Na 3.2 V 1.8 Mn 0.15 Mg 0.05 (PO 4 ) 3 (NVMMP) with Mn 2+ and Mg 2+ dual-substituents has been designed considering the low cost and environmentally friendly characteristics. The synergistic effects introduced by Mn 2+ and Mg 2+ substitution led to a significant increase in the capacity and cycle life of the optimized NVMMP cathode material (with a capacity retention rate of 90.6 % after 2500 cycles at 2 A g −1 ). Furthermore, the reversible storage mechanism of Zn 2+ in NVMMP cathode materials and the theoretical study of such synergistic substitution on intrinsic electronic conductivity have been revealed by different in/ex-situ characterization techniques and theoretical calculations, where redox processes generated by Mn 3+ /Mn 4+ , enhanced ionic/electron pathway, and the pinning effect caused by injecting inert MgO 6 octahedra into the NASICON framework are key points to high capacity and long-life span.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
WATER RESEARCH
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2021
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IF 11.236
Qianyuan Yang,Longqian Xu,Qunbiao He,Deli Wu
Electrochemical precipitation is a promising technique for hardness abatement without the addition of external ions. However, the scale layer on cathode deteriorated the removal efficiency and limited the practical application. Herein, a fenced cathode structure was designed to prevent cathodic precipitation. The cathode was fenced by a crystallization-inducing material for separating the OH − production and crystallization processes. Precipitation on the cathode was confirmed to shift to the crystallization-inducing material, and the clean fenced cathode provided efficient long-term OH − production. At a current density of 40 A/m 2 , the Ca 2+ or Mg 2+ removal efficiency increased by 12.8% or 46.1%, respectively, compared to those of a traditional cathode. Thermodynamic equilibrium in synthetic water and mine water, mass transfer and the location of precipitation were analyzed to elucidate the electrochemical precipitation process. The enhanced mechanism was ascribed to the crystallization-inducing material, which remarkably promoted the crystallization process, and hindered OH − migration, thereby increased the pH of alkaline microenvironment. Notably, a recovery design was proposed to recover pure calcite and brucite from alkalinity-free wastewater. The design reveals a promising strategy for enhancing the crystallization process and reducing cathodic scale, also initiating a new research direction toward hardness removal.
研究领域:
环境工程
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水处理
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电化学
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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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yujie Zhang,Xin He,Haomiao Li,Wenjie Zhao,Kangli Wang,Kai Jiang
Rechargeable magnesium battery is regarded as the promising candidate for the next generation of high-specific-energy storage systems. Nevertheless, issues related to severe Mg-Cl dissociation at the electrolyte–electrode interface impede the insertion of Mg 2+ into most materials, leading to severe polarization and low utilization of Mg-storage electrodes. In this study, a metal–organic polymer (MOP) Ni-TABQ (Ni-coordinated tetramino-benzoquinone) with superior surface catalytic activity is proposed to achieve the high-capacity Mg-MOP battery . The layered Ni-TABQ cathode, featuring a unique 2D π-d linear conjugated structure, effectively reduces the dissociation energy of Mg x Cl y clusters at the Janus interface, thereby facilitating Mg 2+ insertion. Due to the high utilization of active sites, Ni-TABQ achieves high capacities of 410 mAh/g at 200 mA g −1 , attributable to a four-electron redox process involving two redox centers, benzoid carbonyls, and imines . This research highlights the importance of surface electrochemical processes in rechargeable magnesium batteries and paves the way for future development in multivalent metal-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Engineering
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2022
·
IF 12.834
Wenguang Wang,Yanqiu Zhang,Xiaobin Yang,Haixiang Sun,Yadong Wu,Lu Shao
Monovalent cation exchange membranes (M-CEMs) have been extensively applied in environmental remediation and energy harvesting such as the extraction of Na + or Li + from brine and seawater. However, owing to the limitations of membrane structures and materials, M-CEMs have a low perm-selectivity issue. Herein, we proposed a facile approach to construct a novel M-CEM with a Janus-charged structure, consisting of a positively-charged trimesic acid/polyethylenimine surface thin layer and a negatively charged commercial cation exchange membrane (CEM). Selectrodialysis results indicated that the Janus-charged M-CEMs could effectively suppress the migration of anions, which often occurred in porous CEMs, thereby enabling the novel Janus-charged M-CEMs to possess high perm-selectivity and high total cation fluxes. Compared with state-of-the-art M-CEMs, the Janus-charged M-CEM exhibited the highest perm-selectivity of 145.77 for Na + /Mg 2+ beyond the contemporary “Upper Bound” plot as well as the excellent perm-selectivity of 14.11 for Li + /Mg 2+ , indicating its great potentials in ion separation. This study can provide novel insights into the design of Janus-charged M-CEMs for ion separation in diverse environmental and energy applications.
研究领域:
环境科学
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能源材料
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yingyao He,Guiliang Li,Haibo Lin,Qiu Han,Yinlu Ye,Jianqiang Wang,Fu Liu
Selective separation property enhancement is quite important for membranes separations, especially for high mass ratio Mg 2+ /Li + separations. Low selectivity and unclear separation mechanism are the challenges for current membranes. In this study, we designed 4-aminophenyl-15-crown-5 incorporated polyamide nanofiltration membranes through interfacial polymerization for Li + enrichment. The electrochemical tests and energy barrier calculations using transition state theory confirmed that the crown ether in nanofiltration membrane is responsible for governing Mg 2+ transportation, resulting in a substantial energy barrier impeding its transport. Furthermore, a two-stage nanofiltration process was employed to enhance Li + enrichment in simulated brine and achieved 35-fold increase in Li + enrichment using as-fabricated membranes. These results demonstrate the substantial potential for Li + extraction from brine with a high Mg 2+ /Li + mass ratio using the crown ether incorporated membrane. Meanwhile, the proposed strategy incorporating transport barriers presents a novel approach for designing ion-selective channels within membranes.
研究领域:
材料科学
·
环境工程
✓ 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）