DESALINATION
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2026
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IF 9.8
Mengyao Chen,Yangxiang Huang,Yeqiang Lu,Congjie Gao,Lixin Xue
Polyamide/polyethylene (PA/PE) nanofiltration (NF) membranes based on polyethyleneimine (PEI) had demonstrated excellent Li + /Mg 2+ selectivity, but showing trade-off between their permeance and Li + /Mg 2+ selectivity. In this work, a novel cross-substrate counter diffusion (CSCD) method was introduced to grow and secure ZIF-L particles in the PA layers. Specifically, rather than directly contacting the PA layers containing Zn(II) cation (PA/Zn) with an aqueous solution of 2-methylimidazole (2-MIM) ligand from the top sides, 2-MIM ligand molecules were diffused across the PE substrate from the bottom sides to react with Zn(II) secured on the top sides of PA layers. Compared with the top-down method, the bottom-up approach had yield PA/ZIF-B NF membranes with higher surface roughness, larger average pore size and narrower pore size distribution. Notably, the pure water permeance of PA/ZIF-B membrane was increased by 2.6-folds to 15.1 L·m −2 ·h −1 ·bar −1 at a high Li + /Mg 2+ separation factor (S Li/Mg ) of 16.5, breaking the trade-off performance upper bound between water permeance and Li + /Mg 2+ separating selectivity and outperforming most of the reported TFN NF membranes.
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DOI
高影响因子
THIN SOLID FILMS
·
2017
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IF 1.879
Lixin Song,Jifeng Zhai,Pingfan Du,Jie Xiong,Frank Ko
TiO 2 nanorods (NRs), Mg 2 + doped TiO 2 (Mg 2 + /TiO 2 ) NRs, and carbon nanotubes incorporated TiO 2 (CNTs/TiO 2 ) NRs are fabricated from the corresponding electrospun nanofibers (NFs) by ultrasonic treatment , respectively. Then these NRs are made into various photoanodic films through electrospray deposition and hot-compression for flexible dye-sensitized solar cells (FDSSCs). The conversion efficiency of FDSSCs is improved with the CNTs incorporation or the Mg 2 + ions doping of TiO 2 . To further improve the properties of FDSSCs, various bilayer photoanodic films made of the smaller diameter NRs as under-layer and the larger diameter NRs as over-layer are prepared. Finally, a highest conversion efficiency of 3.9% is obtained using the bilayer NRs film composed of the smaller diameter CNTs/TiO 2 NRs and the larger diameter Mg 2 + /TiO 2 NRs. This efficiency is much higher than that of the single-layer NRs film based FDSSCs. This may be attributed to the increased light harvesting resulting from the scattering layer of the larger diameter NRs and the faster electron transport due to the two-level energy steps of the bilayer NRs film.
研究领域:
材料科学
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纳米技术
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光伏学
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能源材料
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Yanghe Liu,Quan Li,Shenghuan Wang,Mengzhu Liang,Yanhong Ji,Zhenyu Cui,Mohammad Younas,Jianxin Li,Benqiao He
High-performance nanofiltration (NF) membrane plays a key role in Li + /Mg 2+ separation process. In this work, a new NF membrane with positively and negatively charged groups was prepared by grafting p-aminosalicylic acid (AS) onto the surface of polyamide (PA) membrane followed by chelation with Fe 3+ ions for Li + /Mg 2+ separation. The AS grafting (PA-g-AS) and Fe 3+ chelating (PA-g-AS-Fe) NF membranes had almost same surface and section structure and surface pore size as the PA membrane. But Zeta potential (about −8 mV at pH 7) of the obtained PA-g-AS-Fe membrane was improved in comparison with the PA and PA-g-AS NF (about −20 mV at pH 7) membranes due to Fe 3+ addition, suggesting that there were positively and negatively charged groups on the membrane surface. The PA-g-AS-Fe membrane showed a high Mg 2+ rejection of 97.7% and high Li + permeation (negative rejection of −87.6%); while a high Li + /Mg 2+ separation factor (S Li , Mg ) of about 81.5 was achieved, which is much higher than those for PA and PA-g-AS NF membranes and surpassed those of the results reported in literature. The fluxes of three membranes were about the same. The results demonstrated the NF membrane with positively and negatively charged groups was suitable for efficient separation of Li + /Mg 2+ and would have promising applications in recovery of lithium from brine.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xintong Li,Xiaoya Li,Xin Ma,Zhanfang Cao,Hong Zhong,Shuai Wang
Manganese is a critical metal with widespread applications. The increasing demand for manganese, driven by the rapid growth of the electric vehicle and new energy sectors, has underscored the need for efficient separation and purification technologies, particularly from low-grade ores with high content of impurities. This study applies machine learning (ML) −driven quantitative structure–activity relationship (QSAR) modeling to investigate the Mn 2+ and Mg 2+ separation performance of 14 extractants. Key molecular descriptors were identified through principal component analysis and clustering heatmap method, and QSAR models were developed using ordinary least squares, nonlinear model, artificial neural network, random forest, and extreme gradient boosting (XGBoost) tree. The XGBoost model exhibited superior predictive accuracy for Mn 2+ and Mg 2+ extraction efficiencies and Mn 2+ /Mg 2+ separation selectivity. Feature importance analysis revealed that molecular properties related to hydrophilicity, electronic characteristics, and steric hindrance, as reflected by descriptors such as Clog P, OAV, Nonpolar S, VIP, Max P, and EI, play decisive roles in governing extraction efficiency and separation performance. Further NCI analysis demonstrated that the C–OH group of one α -hydroxyalkyl phosphinic acid ( α -HA) molecule forms a hydrogen bond with the C–OH group of another α -HA molecule, which likely accounts for the tendency of α -HA molecules to form dimers during solvent extraction. This interaction modulates the spatial arrangement of P–OH and P=O groups, enhancing both Mn 2+ extraction efficiency and Mn 2+ /Mg 2+ separation selectivity. These findings underscore the value of ML-driven QSAR modeling in predicting extractant performance, offering new mechanistic insights into Mn 2+ /Mg 2+ separation, and informing the development of novel extractants.
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高影响因子
CHEMISTRY OF MATERIALS
·
2023
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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
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能源存储
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DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Jiadi Ying,Zhen Cui,Xiaoxiang Xi,Junwei Zhu,Tiancun Liu,Song Lu,Qi Shen,Min Guo,Yeqing Wang,Zhen Yang,Yaochun Chen,Minfeng Zeng,Zhixin Yu,Yuqing Lin
The selective separation of Li + from Mg 2+ in salt lake brines is critical for sustainable lithium supply but remains challenging due to their similar hydrated radii. Unlike conventional approaches that rely on a single polyelectrolyte system, this study introduces a comparative layer-by-layer (LbL) assembly strategy to systematically screen optimal polycationic building blocks. We employ two distinct polycations, polyethyleneimine (PEI) and chitosan (Cs), paired with poly(sodium 4-styrenesulfonate) (PSS) on a sulfonated poly(ether ether ketone) (SPEEK) substrate, and systematically elucidate how polycation chemistry governs membrane structure, surface charge, and ion-transport behavior across the entire LbL assembly series. The optimized PEI7.5 membrane delivers a Li + /Mg 2+ permselectivity of 9.7, a 13-fold improvement over pristine SPEEK (0.73) and a 31% enhancement over Cs7.5 (7.4), while maintaining a high Li + flux of 0.22 mol·m −2 ·h −1 . This performance represents one of the highest selectivity values reported for LbL-assembled monovalent cation exchange membranes. Combined experimental characterization and molecular dynamics simulations reveal that the superior performance of PEI-based membranes originates from synergistically enhanced denser positive charge sites and narrower pore size distribution, which collectively impose stronger electrostatic repulsion and steric hindrance against Mg 2+ . Overall, this work not only establishes a robust structure–property relationship for LbL-assembled polyelectrolyte membranes, but also provides a polycation-screening paradigm and a mechanistic framework for rationally designing next-generation cation exchange membranes toward high-efficiency lithium extraction from brines.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2021
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IF 3.599
Qijian Zhu,Jiansheng Huo,Liguo Zhang,Jinwei Gao,Qianming Wang
Green photosynthetic pigments play a major role in light-harvesting for biological substances and bio-mimetic strategy will provide a structural or functional model for natural antenna system . But the precise supramolecular structure of chlorosome has still not been clearly identified and the simulation of its function with new alternatives will be a real challenge. It has been well accepted that blue and far-red light are responsible for photosynthesis and photomorphogenesis in the process of plant growth. In this work, a series of single-composition LiLa 2 SbO 6 (abbreviated as LLSO): x Bi 3+ , y Mg 2+ , z Mn 4+ phosphors with double perovskite‐type structure and the evaluation as blue and far-red dual-emission light for plant growth light-emitting diodes (LEDs) have been reported via a high-temperature solid-state reaction method. Under near ultraviolet-light ( n -UV) excitation at 355 nm, intense blue emission (ranging from 360 to 500 nm, 3 P 1 → 1 S 0 ) from Bi 3+ and far-red emission (650–750 nm, 2 E g → 4 A 2g ) from Mn 4+ are found in Bi 3+ -Mn 4+ co-activated LLSO phosphors. To further optimize the photophysical properties, smaller Mg 2+ has been incorporated into Li + site in Bi 3+ -doped LLSO phosphor to control blue emission of Bi 3+ . With the increase of Mg 2+ content, an obvious red shift (~15 nm) of Bi 3+ emission band has been detected in the blue region, which is almost overlapped with the absorbance of Chlorophyll- B (around 450 nm). Moreover, the photoluminescence (PL) emission intensity and decay lifetime of Bi 3+ can be improved by substituting Mg 2+ for Li + . These changes should be attributed to the combined effects of the crystal field splitting and the superior lattice rigidity . Finally, the temperature-dependent PL spectra of the composition-optimized phosphor are measured, and the excellent thermal-stable emission (up to 473 K) has been obtained. It has been observed that Bi 3+ blue emission and Mn 4+ far-red emission exhibit different temperature quenching effect and such phosphor can be considered as an ideal candidate in optical thermometry.
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Qiaoyun Liu,Yifeng Yu,Changjiang Liu,Yuhang Liu,Liangjie Yuan,Zheng Wang,Aixi Yu
Lanthanum (La) compounds have attracted much attention because of low toxicity and biocompatibility. In this study, a series of La-doped magnesium phosphate composites bone repair materials (LMPCs) were prepared by the precursor method, in which the molar ratio of lanthanum was 1%, 3% and 5%, respectively. The results of X-ray powder diffraction, scanning electron microscope and compressive strength test show that La-doped magnesium phosphates (LMPs) synthesized by the precursor method have uniform particle distribution, high purity and excellent degradability. In vitro research results show that LMPCs exhibited reliable biosafety and excellent bioactivity. The introduction of lanthanum enhances the antibacterial activity of Escherichia coli and Staphylococcus aureus of the composite. Furthermore, the combined system of released La 3+ and Mg 2+ is more conducive to promoting the proliferation of mesenchymal stromal cells (MSC) and angiogenesis of human umbilical vein endothelial cells (HUVECs) when the content of lanthanum is 3% (referred to as LMPC-2). By up-regulating the expression of alkaline phosphatase (ALP) and Runt-related transcription factor 2 (RUNX2), LMPC-2 is prominent in promoting osteogenic differentiation, and mineralized calcium deposition in vitro . Moreover, the results of micro-CT, H&E and Masson staining confirmed the beneficial effect of the combined system of La 3+ and Mg 2+ on the repair of rat skull defects in vivo . These achievements will provide new strategies for improving the biological activity of LMPCs and provide reference value for bone repairing in the clinic.
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高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Zhibin Ye,Ziwang Zhang,Nan Yang,Zhuo Li,Weijie Huang,Jianxin Shi
Artificial light sources have a significant impact on the cultivation of houseplants. In this work, a novel single-phase dual-emission phosphor, Ca18Na3Y(PO4)14:Eu2+,Mn2+ (CNYPO:Eu2+,Mn2+), was synthesized and the emission spectra were modulated by co-doping of Mg2+ to better match the absorption of plants. The occupancies of Eu2+, Mn2+ and Mg2+ are analyzed by using the data of bond length from XRD Rietveld refinements and the emission spectra. The energy transfer process from Eu2+ to Mn2+ is proved through the photoluminescence spectra and decay curves. Benefiting from the efficient energy transfer, two broadband emissions peaking at 500 and 650 nm can be achieved, which meets the requirements of plant growth, and the luminescence colour can be tuned from cyan to white and finally to red by changing the ratio of Mn2+ to Eu2+. The internal quantum efficiency of CNYPO:0.18Eu2+,0.18Mn2+ is 76.8% under 340 nm excitation. The introduction of Mg2+ can regulate the occupation sites of Eu2+ and the emission peak position, improve the responsiveness to the plant absorption spectra, and tune the luminescence colour to white. Finally, a white light-emitting diode (WLED) device fabricated using CNYPO:0.18Eu2+,0.18Mn2+,2.16Mg2+ on a 365 nm chip has a high colour rendering index of 89.0 and a low correlated colour temperature of 3580 K, indicating that the prepared phosphor has potential applications in plant lighting and WLEDs.
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Lan Li,Tingxue Fang,Fuming Lai,Xinyue Li,Tingting Qu,Lin Wang,Xiaoshi Lang,Kedi Cai
Vanadium pentoxide (V2O5) is regarded as a promising sulfur-wrapped matrix for high-performance lithium–sulfur batteries, owing to its desirable structural and functional characteristics. In this paper, a large number of defective sites arise in the vanadium pentoxide structure via a codecoration strategy of the V, O sites, which is more beneficial to improving the electroconductivity and allows for the uniform loading of sulfur on the surface, thereby reducing the polarization resistance and elevating the kinetic rates during the electrochemical reaction. Electrochemical test results indicate that Mg2+/S-codecorated V2O5/S composite cathodes have 1131.15, 942.39, and 804.71 mAh·g–1 of discharge-specific capacities at 0.1, 0.2, and 0.5 C rates, respectively, with the lowest charge/discharge plateau voltage difference, and the capacity retention rate after 140 cycles can be 57.95%. Besides that, the multidefect V2O5 can effectively promote the adsorption strength of lithium polysulfide and catalytically accelerate the rate of liquid-phase conversion between lithium polysulfide so as to achieve the stable electrochemical properties for sulfur composite cathodes.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wenshan Li,Qingqing Li,Huaiyue Xia,Wenjie Liu,Guoxing Jing,Jianna Yu,Wen Liu,Mengtong Lin,Yujuan Huang
Ochratoxin A (OTA) is a compound of concern due to its potential health effects on humans. Detecting OTA in food is crucial for safeguarding public health. In this study, we fabricated a multi-DNAzyme cascade reaction-mediated colorimetric aptasensors for OTA detection, integrating autocatalytic Mg 2+ -dependent DNAzyme cleavage (MNAzyme) and an entropy-driven circuit. In brief, the recognition between the aptamer and target OTA led to the release of DNA1. Subsequently, DNA1 hybridized with DNA2, generating an upstream MNAzyme that facilitated the production of a downstream MNAzyme. These MNAzymes possess similar substrate binding arms, enabling them to catalyze the same substrate. The catalytic efficiency of MNAzymes towards the substrates was enhanced due to the increasing concentration of MNAzymes. The cleavage products then triggered an entropy-driven cycle to generate a signal. Under optimal conditions, the sensing system exhibited low detection limits of 48.97 fM for OTA. Additionally, the proposed aptasensor was successfully applied to quantitatively analyze OTA in food samples. Thus, the multi-DNAzyme cascade reaction-mediated colorimetric aptasensors offer an adaptable platform for detecting traces of OTA contaminant in food.
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xiaofan Sun,Cuiping Xu,Peiqi Ji,Zheng Tang,Shulin Jiao,Yanzhou Lu,Min Zhao,Hong-Ling Cai,X.S. Wu
Dielectric capacitors are used in pulsed power devices due to their high-power density. The energy storage density and efficiency need to be further improved to widen their applications. This work investigates the energy storage of high entropy ceramic (Pb 0.25 Ba 0.25 Ca 0.25 Sr 0.25 )TiO 3 synthesized by the solid-state method. The Bi(Mg 2/3 Nb 1/3 )O 3 (BMN) is introduced to enhance its energy storage performance. The introduction of BMN from x = 0 to 0.15 reduces the grain size from 5.9 μm to 245 nm, increases the band gap from 2.98 to 3.05 eV, and improves the differences between saturation and remnant polarization from 11.85 to 14.60 μC/cm 2 . The phase diagram of this system was constructed by dielectric properties analysis to understand the effect of Bi(Mg 2/3 Nb 1/3 )O 3 in the energy storage performance. The optimal energy density of 5.58 J/cm 3 and efficiency of 89.4% was achieved in 0.9PBCST-0.1BMN which can be promising candidates for application in dielectric energy storage.
研究领域:
材料科学
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电气工程
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能源存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）