IONICS
·
2019
·Vol. 26
·期 2
·777-787
·
IF 2.289
Jing Pengcheng,Lu Huimin,Yang Wenwen,Cao Yuan,Xu Binbin,Cai Wei,Deng Yan
Magnesium batteries based on Mg 2+ /Li + dual ion electrolytes (MLIBs) have attracted increasing attention due to fast Li + or Mg 2+ /Li + insertion kinetics, abundant Mg resources, and high volumetric capacity of dendrite-free Mg anodes. Herein, we report polyaniline (PANI)–coated VS 4 @reduced graphene oxide (rGO) with nanostructures synthesized via hydrothermal synthesis and subsequent PANI polymerization as the cathode material for MLIBs. The PANI layer serves as a conductive medium to enhance electron transfer and Mg 2+ /Li + transportation as well as to mitigate the structure changes of VS 4 during the cycling process. Indeed, this material demonstrates enhanced electrochemical performance with a high discharge capacity of 200.7 mAh g −1 after 20 cycles and 91.2% retention after 50 cycles. Mechanism analysis reveals that Li + insertion into VS 4 produced an amorphous VS 4 host in the first discharge, which inclined to store Mg 2+ rather than Li + in the subsequent cycles. Our study provides new insights into the development of amorphous electrode materials for magnesium batteries.
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JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Huanhuan Wu,Yakai Lin,Wenyan Feng,Tianyin Liu,Lin Wang,Hong Yao,Xiaolin Wang
In order to utilize lithium from brines with high Mg 2+ /Li + ratio, a positively charged nanofiltration (NF) membrane was prepared by grafting amine-functionalized ionic liquid 1-(3-aminopropyl)-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([MimAP][Tf 2 N]) onto the surface of polyamide (PA) membrane. The effects of [MimAP][Tf 2 N] contents on the chemical composition, surface morphology , surface charges and separation properties of the modified PA membranes were discussed. The results of chemical composition analyses indicated reaction of the amine group of [MimAP][Tf 2 N] with the residual acyl chloride groups, which was existed on the surface of the nascent PA membrane. The surfaces of all the modified PA membranes were positively charged at pH = 6.4 due to the quaternary ammonium group of [MimAP][Tf 2 N]. In the separation process, the resulting membrane presented high water permeance (37.8 L/(m 2 ⋅h)) and mono-/divalent cation selectivity (Li + and Mg 2+ ) with much higher MgCl 2 rejection (83.8%) than LiCl rejection (24.4%). For a simulative brine with a Mg 2+ /Li + ratio of 20, the rejections to Mg 2+ and Li + by the optimized membrane (NF-IL-2.0%) were around 81.9% and −45.2%, respectively, where the permeate with the Mg 2+ /Li + ratio of 3.5 was obtained and the selectivity ( S Li,Mg ) was 8.12. Additionally, the optimized membrane exhibited a stable performance for Mg 2+ /Li + separation. Therefore, there is a very possibility for utilization of lithium from brine with high Mg 2+ /Li + ratio by using the optimized NF membrane.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Qinghong Meng,Xuejiao Wang,Qi Zhu,Ji-Guang Li
A series of phase-pure [(Gd 0.6 Lu 0.4 ) 0.99 Ce 0.01 ] 3 [Al 1- z (Mg/Si) z ] 5 O 12 ( z = 0-0.10) garnet phosphor powders were prepared via gel-combustion, which were then sintered into ceramics (up to 1550 °C) under atmospheric pressure. Dilatometry revealed that equimole of Mg 2+ /Si 4+ substitution for Al 3+ accelerates densification and lowers the activation energy for grain boundary diffusion in the intermediate stage of sintering (∼1150–1370 °C), which was assayed to be ∼353 kJ/mol for z = 0 and ∼289 kJ/mol for z = 0.10. The acceleration effects of Mg 2+ /Si 4+ on sintering and grain growth were further demonstrated by the results of ramp and holding sintering. Firing at 1550 °C for 4 h also produced ∼99 % dense ceramics for the Mg 2+ /Si 4+ codoped garnet powders. Through considering crystal splitting of the Ce 3+ 5d energy level, photon-phonon coupling, and crystal structure/microstructure, the influences of Mg 2+ /Si 4+ content and material form on Ce 3+ luminescence, including intensity, external/internal quantum efficiencies, emission wavelength, CIE color coordinates and decay time, were clarified in detail.
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ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Lu Li,Yuanyuan Fan,Qingling Li,Renjie Sheng,Haibin Si,Juan Fang,Lili Tong,Bo Tang
Various intracellular metal ions have closely related functional roles in the nervous system. An excess or deficiency of essential metal ions can contribute to neurodegenerative diseases. Thus, the detection of various metal ions in neurons is important for diagnosing and monitoring these diseases. In particular, single-cell analysis of multiple metal ions allows us to not only understand the cellular heterogeneity and differentiation but also determine the actual relationships among multiple metal ions in each individual cell. Aiming at the low efficient single-cell manipulation and interference of complex biological matrices within cells in the existing method for single-cell metal ion detection, in this manuscript, we present a convenient, sensitive, and reliable method to simultaneously identify and quantify multiple metal ions at the single-cell level using a microfluidic system. Using the combination of on-chip electrophoresis separation and multicolor fluorescence detection, we achieved the simultaneous analysis of Na+, K+, Ca2+, and Mg2+ in single PC-12 cells and studied changes in these four metal ions in Aβ25–35-treated PC-12 cells, which is a model of Alzheimer’s disease (AD). The data showed that metal ions imbalances in neuron-like cells may be associated with AD induced by Aβ25–35. This method paves the way for multiple metal ion detection in single neuron-like cells, and the results provide insights regarding synergistic function of multiple metal ions in regulation of neurological diseases at the single-cell level.
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PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Donggang Tao,Ting Li,Yudi Tang,Yuliang Cao,Fei Xu
Rechargeable magnesium batteries attract interest as advantageous energy-storage devices, but the application is being hampered by the deficiency of suitable cathodes. The traditional method to weaken the interaction between bivalent Mg2+ cations and the cathode material is to increase the anion radius, but excessive expansion of the anion would lead to a decrease of the theoretical capacity and offset the performance improvement. Herein, a new strategy using a redox-active polyatomic anion is developed in terms of copper tetraselenophosphate (Cu3PSe4) fabricated by the PSe43– anion. The covalent P–Se bond facilitates the negative charge delocalization of the PSe43– anion and weakens the interaction with Mg2+ cations, which result in rapid solid-phase Mg2+ diffusion kinetics. The PSe43– anion also provides extra capacities by reversible valence state change of the P element. Cu3PSe4 delivers a high Mg-storage capacity of 225 mAh g–1 at 50 mA g–1 and a superior rate performance of 62 mAh g–1 at 5000 mA g–1, as well as a stable cyclability of 500 cycles. The redox-active polyatomic anion strategy herein opens a new avenue for the exploration of magnesium battery cathodes with a comprehensive consideration of kinetic performance and theoretical capacity.
研究领域:
材料科学
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电化学
·
能源存储
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Qinghong Meng,Yuning Zhang,Xiangming Li,Wanjun Yu,Zhijun Xu,Ji-Guang Li
Doping Gd 3 Ga 3 Al 2 O 12 :Cr 3+ with Mg 2+ /Si 4+ pair to develop Gd 3 Ga 3 – y Al 2 – 2 x Mg x Si x O 12 : y Cr 3+ ( x = 0–1.0; y = 0.005–0.05) new garnet solid solution was implemented for the regulation of structure and photoluminescence. Rietveld refinement, SEM/TEM, and UV-Vis-NIR/photoluminescence spectroscopy analysis clarified that Mg 2+ /Si 4+ incorporation increasing resulted in the enlargement of the unit cell, the expansion/larger distortion of [(Ga,Al,Mg,Cr)O 6 ] octahedron, the decrease of crystal field strength, red-shifting and broadening of emission band, and shortening decay times. The optimal Gd 3 Ga 2.97 MgSiO 12 :0.03Cr 3+ phosphor realized broadband NIR emission (centered at ∼760 nm, full-width at half-maximum ∼114 nm) under 450 nm light excitation and exhibited high quantum efficiency (IQE=71.0 %, EQE=29.4 %) and good thermal stability (78.5 %@423 K). The NIR pc-LED fabricated by combining this optimal phosphor with a 450 nm blue LED chip showed satisfactory output power (∼26.83 mW) and conversion efficiency (10.02 %) under a driving current of 100 mA, indicating that this phosphor has huge potential utilized in the construction of NIR pc-LED applied in night vision and noninvasive medical diagnosis.
研究领域:
材料科学
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光学材料
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固态照明
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无机化学
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光子学
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 27
·19333-19345
·
IF 4.4
Shi Liang,Wu Junjie,Chen Junrun,Liu Cheng,Zhang Yun,Hu Kongyi,Fan Xiaobo,Wang Xueying
This study systematically investigates the intricate mechanism by which Mg 2 ⁺ and W 6 ⁺ co-doping affects the crystal structure and microwave/terahertz dielectric properties of ixiolite-type ZnTiNb 2 O 8 (ZTN) ceramics. A series of doped ZTN ceramics were prepared via the solid-state reaction method, with doping concentrations ranging from 3 to 15 mol%. The incorporation of Mg 2+ and W 6+ ions into the ZTN lattice was confirmed by X-ray diffraction (XRD) analysis and subsequent Rietveld refinement, resulting in a significant expansion of the lattice parameters. The dielectric constant (ε r ) of the co-doped ceramics decreased gradually with increasing doping content, which can be attributed to the reduced ionicity of Nb–O bonds and the lower molecular polarizability caused by ion substitution. Notably, an optimal quality factor (Q × f) of approximately 39300 GHz (@6.6 GHz) was achieved at a 9 mol% doping level. At 12 mol%, the sample achieved an excellent Q × f value approaching 39050 GHz in the terahertz band (@ 0.84 THz). This enhancement is explained by the increased lattice energy and improved structural stability caused by the co-doping. Furthermore, the τ f value shifted from − 68.4 to − 47.1 ppm/°C with increasing Mg/W content, which is associated with the reduced thermal expansion coefficient and enhanced stability of the oxygen-polyhedral framework. These results provide a theoretical basis for designing high-performance microwave and terahertz dielectric materials.
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Journal of Magnesium and Alloys
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2025
·
IF 13.8
Fanfan Liu,Xiaomeng Fan,Xinyue Gao,Jinjin Ban,Guoqin Cao,Shilin Zhang,Junhua Hu
Rechargeable Mg/Li hybrid ion batteries with Mg 2+ /Li + double-salt electrolytes and safe Mg anodes are a viable option for large-scale energy storage. Nevertheless, achieving the desired reasonable electrochemical performance remains a great challenge due to the capacity limitations of conventional Li-intercalation cathodes. To mitigate this limitation, the 3D oxygenated MXene Ti 3 C 2 @CoS 2 /FeS 2 (denoted as o-Ti 3 C 2 @CoS 2 , o-Ti 3 C 2 @FeS 2 ) with both dual-storage mechanism and multidimensional structure to achieve the desirable storage capacity is engineered. Benefiting from the formation of special structure and interfacial chemical bonds Ti–O–Co/Ti–O–Fe, as well as the electronegative o-Ti 3 C 2 weaken the Co–S/Fe–S bonds, the o-Ti 3 C 2 @CoS 2 cathode exhibits superior capacity up to 425 mAh g −1 at 100 mA g −1 and overwhelming advantageous ultra-long life over 2,400 cycles at 500 mA g −1 . Simultaneously, the o-Ti 3 C 2 @FeS 2 also displays a high-rate capability, outstanding cycling stability, and fast diffusion kinetics. Furthermore, the conversion reaction of Mg 2+ /Li + co-intercalation and the charge storage mechanism during cycling are thoroughly clarified by systematic ex-situ characterizations and theoretical computations. This study reveals the influence of MXene electrode structure on the importance of electrochemical performance and provides guidance for the future design of high-performance MXene materials for energy storage applications.
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Small
·
2025
·
IF 12.1
Chenggong Zhu,Qunfang Huang,Ruijie Fu,Zhen Xun,Qishui Ou,Yunlei Xianyu,Can Liu
Hepatitis B virus (HBV) infection remains a significant global public health issue, and rapid detection of HBV DNA is crucial for disease prevention and control. However, traditional methods for HBV DNA detection are limited by their reliance on precise instruments and single readout, which can hardly meet the requirements of on-site detection. In this study, the Mg 2+ -enhanced trans-cleavage activity of clustered regularly interspaced short palindromic repeats/associated protein 12a (CRISPR/Cas12a) is reported and coupled with loop-mediated isothermal amplification (LAMP) and Au@Pt nanoparticles as a signaling reporter for on-site detection of HBV DNA. This triple-modal biosensing strategy enables multiple signal readouts including UV–vis spectrum, RGB value, and temperature with high sensitivity and accuracy. The linear detection ranges using UV–vis spectroscopy, RGB color recognition, and photothermal modes are from 50 to 10,000 copies µL −1 , with the limitation of detection of 24.07, 39.65, and 23.33 copies µL −1 , respectively. This biosensing strategy is further employed for the qualitative detection of HBV DNA in 48 serum samples, achieving sensitivities of 100%, 100%, and 95.24% for triple modes. This work offers a promising tool of next-generation LAMP-CRISPR/Cas12a for the rapid and portable detection of nucleic acids.
研究领域:
生物传感器
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病毒学
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纳米技术
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分子诊断学
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CRISPR技术
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分析化学
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PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 4
·286
·
IF 21.8
Mao Gaoqiang,Lu Jingfan,Cai Haiyan,Yu Wanjing,Tong Hui,Guo Xueyi,Zeng Leiying,Jiang Long
Increasing the operating voltage can significantly increase the energy density of LiCoO 2 , but it is accompanied by severe structural damage and interface degradation. Especially at a high voltage above 4.5 V, LiCoO 2 faces severe challenges, such as irreversible phase transition, lattice oxygen loss, and electrode–electrolyte interface evolution. Herein, a high-voltage LiCoO 2 cathode material with bulk doping and surface coating synergistic modification was designed and prepared. The doped Mg 2+ ions entered the lithium layers as pillars, stabilizing the layered framework. Meanwhile, Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 was uniformly coated on the surface of LiCoO 2 , which is beneficial for suppressing Co 3+/2+ ion leaching and interface side reactions during cycling. Furthermore, Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 is a fast ion conductor, which facilitates the rapid transport of lithium ions on the surface of the cathode material. Owing to the synergistic effect of Mg 2+ ion doping and Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 coating, the orbitals of Co 3d and O 2p in LiCoO 2 crystal are changed, and the irreversible phase transition and oxygen loss are inhibited. The modified material exhibited an excellent electrochemical performance. A discharge capacity of 175.5 mAh·g −1 at 10 C rate, as well as a capacity retention of 90.14% after 200 cycles at 1 C rate, was achieved in the modified material. This work supplies a new method for developing high-voltage oxide cathodes through bulk and interfacial modification.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
·
正极材料
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Hailin Chang,Shilei Fu,Ziao Zhang,Yating Hu,Zijian Cui,Jun Ma,Kexin Hou,Xiaobin Tang,Guibai Li,Heng Liang
Nanofiltration (NF) membranes with efficient selectivity are critical for addressing water source pollution from toxic heavy metals and emerging micropollutants. Herein, we engineered a polyamide (PA) NF membrane with ambidextrous selectivity by leveraging the concentration-driven effect of piperazine (PIP) during interfacial polymerization (IP). This PIP concentration-driven effect was verified by modulating the PIP concentration gradient from low to high, which enhanced IP efficiency via both an intensified alkaline reaction environment and concentration-driven diffusion. The optimized NF membrane features an ultrafine pore size distribution and reduced electronegativity, exhibiting a remarkable shift from sole SO 4 2− /Cl − selectivity to impressive ambidextrous selectivity, encompassing both SO 4 2− /Cl − (α ≈ 48, 98.3 % for Na 2 SO 4 ) and Mg 2+ /Na + (α ≈ 37, 98.2 % for MgCl 2 ). Moreover, it membrane also achieved exceptional removal efficiencies of 94.8–98.9 % for heavy metals and 77.6–99.3 % for antibiotics, while maintaining a water permeability of 19.3 L/m 2 h bar and mitigating the perm-selectivity trade-off. When purifying surface water containing heavy metals and antibiotics, the optimized NF membrane exhibited superior multi-pollutant removal and improved water production quality compared to the NF270 and NF90 membranes, and especially with its water permeance increased by ~27 % to 179 %. Our work uncovers a fundamental correlation between the PIP concentration, IP reaction, PA nanostructures and NF performance, providing valuable insights into customizing high-performance NF membranes to address complex water pollution challenges.
研究领域:
环境工程
·
膜科学
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水处理
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高分子化学
·
纳米技术
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Mengyao He,Rui Liu,Xiaoli Li,Gan Zhang,Guanxing Lao,Song Guo,Yuanli Liu
Compared with traditional luminescent materials, nonconventional luminogens have been extensively studied due to their unique properties and wide range of applications. However, the study of nonconventional luminescent polymers is rare because most luminescent polymeric materials can only emit light at high concentrations and require noble metal catalysts for synthesis. Particularly, their application in the field of metal ion detection and biological imaging is still restricted. To expand its application scope, this work designed a series of luminescent polymeric materials only containing carboxyl and amide groups, which were synthesized from poly(methyl vinyl ether maleic anhydride) and 4-(2-aminoethyl)morpholine at different molar ratios (PMVEMA/AML are 1:1, 1:2, and 1:3). The synthesized luminogens exhibited controllable luminescence colors and excellent solubility in various commonly used solvents. Additionally, the polymers can achieve luminescence in dilute solutions, and the maximal luminescence efficiencies can be up to 5.55%. At last, polymer M3 with good biocompatibility and low cytotoxicity can be used to sensitively detect Mg2+ ions in vivo and in vitro. Notably, polymer M3 possesses the ability to target the organelle lysosome in cell imaging.
研究领域:
材料科学
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生物医学工程
·
化学
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高影响因子
危险品化学品经营许可证（带存储）