Nanomaterials
·
2023
·Vol. 13
·期 20
·2777
·
IF 5.3
Zhenhua Feng,Chengwen Liu,Binbin Tang,Xiaojun Yang,Wenjie Jiang,Peng Wang,Xianjun Tang,Hongshan Wang,Xiangdong Zeng,Guangyong Zeng
Graphene oxide (GO) two-dimensional (2D) membranes with unique layer structures and tunable layer spacing have special advantages and great potential in the field of water treatment. However, GO membranes face the issues of weak anti-swelling ability as well as poor permeability. We prepared GO/Ti3C2TX2D composite membranes with 2D/2D structures by intercalating Ti3C2TXnanosheets with slightly smaller sizes into GO membranes. Ti3C2TXintercalation can effectively expand the layer spacing of GO, thereby substantially enhancing the flux of the composite membrane (2.82 to 6.35 L·m−2·h−1). Moreover, the GO/Ti3C2TXcomposite membrane exhibited a good Mg2+/Li+separation capability. For the simulated brine, the separation factor of M2 was 3.81, and the salt solution flux was as high as 5.26 L·m−2·h−1. Meanwhile, the incorporation of Ti3C2TXnanosheets significantly improved the stability of GO/Ti3C2TXmembranes in different pH environments. This study provides a unique insight into the preparation of highly permeable and ion-selective GO membranes.Keywords:graphene oxide;Ti3C2TXnanosheets;two-dimensional materials membrane;Mg2+/Li+separation
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Yijiang Li,Xiaoxia Yang,Zhaohua Wang,Wencheng Xia,Feng Wu,Yujin Sun,Xiangyun Sun,Shiqi Liu
This study researched into the underlying influence mechanism of Ca 2+ and Mg 2+ on the rheological properties of kaolinite slurry through rheological technique, turbidity analysis and DLVO theory calculation. The rheological results showed that both the viscosity and yield stress of kaolinite slurry were reduced under high Ca 2+ /Mg 2+ concentration. The apparent viscosity of slurry containing Mg 2+ was lower than that of slurry containing Ca 2+ , but the yield stress of slurry containing Mg 2+ was higher than that of slurry containing Ca 2+ . Turbidity results showed that Ca 2+ have a stronger turbidity removal effect on kaolinite suspension than Mg 2+ . The agglomeration of kaolinite in the presence of Ca 2+ was greater than that in the presence of Mg 2+ . The DLVO theoretical calculation results indicated that there was strong attractive energy between silica face-alumina face, silica face-edge face and edge face-edge face under 1 mmol/L Ca 2+ /Mg 2+ . There were repulsive energy barriers between the silica face-silica face, as well as between the alumina face-alumina face and alumina face-edge face. However, there was an attractive energy between the alumina face-edge face under 1 mmol/L Mg 2+ . The kaolinite agglomeration was a basal face-basal face (F-F) structure with tight and large under 1 mmol/L Ca 2+ , but the kaolinite agglomeration was F-F and edge face-basal face (E-F) structure with loose and large under 1 mmol/L Mg 2+ . The E-F structure in the presence of Mg 2+ caused high yield stress of kaolinite slurry. Under high ions concentration, there was a weak attraction or repulsion between basal faces of kaolinite, but there was an attractive effect between the edge faces. The kaolinite agglomerates were edge face-edge face (E-E) structure with small and even dispersed, resulting in a low viscosity of the slurry. The conclusion of this study provides a basis for regulating the rheological properties of rich-clay slurry during mineral processing.
研究领域:
矿物加工工程
·
胶体化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 7
·4712-4720
·
IF 2.779
Wu Guofa,Ma Mingtao,Li Aihua,Song Kaixin,Khesro Amir,Bafrooei Hadi Barzegar,Taheri-nassaj Ehsan,Luo Shaojin,Shi Feng,Sun Shikuan,Wang Dawei
In this article, garnet-type Y 3 Al 5 O 12 (YAG) were doped with Mg 2+ -Si 4+ ionic pairs and its effect on the structure and the microwave dielectric properties was investigated. It was revealed that in ceramics Y 3 Mg x Al 5-2 x Si x O 12 ( x = 0, 0.5, 1.0, 1.5, 2.0), increasing doping concentration decreased the sintering temperature and time for the optimal densification. X-ray diffraction studies showed that the samples are isostructural to Al 5 Y 3 O 12 garnet. All sample were formed a single phase except for x = 2.0, where a secondary peak was detected. Excellent microwave dielectric properties of ε r = 10.56, Q × f = 67,571 GHz and τ f = -35.23 ppm/°C were obtained for Y 3 Mg 0.5 Al 4 Si 0.5 O 12 ceramics sintered at 1625 °C for 5 h. The factors influencing the microwave dielectric properties of Y 3 Mg x Al 5-2 x Si x O 12 ceramics were further discussed by considering the ionic polarization, packing fraction, average grain size and chemical bond valence theory.
研究领域:
材料科学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Pengcheng Zhang,Qunfeng Wu,Zhaoyang Cai,Honghui Wang,Pengfei Zhou,Hongcheng Yang,NaiYue Zhang,Jiran Liang,Hao Li
This study systematically explores how variations in crystal structural parameters affect the microwave dielectric properties of the Mg 2+ x Ti 1- x O 4 (x = 0.04–0.13) ceramics. XRD and Raman analysis reveal that Mg 2+ x Ti 1- x O 4 ceramics ( x = 0.04−0.1) crystallize into a spinel-type structure with a space group of Fd-3m, while a second phase of MgTiO 3 is observed at x = 0.13. The variation in dielectric constant is primarily associated with bond covalency, and changes in bond energy have a significant impact on the variation of τ f . Non-intrinsic factors, such as grain size and relative density, show a marked dependence on the variation in Q × f , while intrinsic factors, particularly lattice energy, play a decisive role on its change. The intrinsic dielectric loss obtained in the far-infrared range is lower than the dielectric loss in the microwave frequency range, indicating that the Mg 2+ x Ti 1- x O 4 ceramics still have potential for further enhancement of Q × f , such as by reducing the influence of non-intrinsic factors. Mg 2+ x Ti 1- x O 4 ceramics at x = 0.1 exhibit the optimal microwave dielectric properties with ε r = 14.15, Q × f = 211457 GHz, τ f = −48.3 ppm/°C.
研究领域:
材料科学
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无机非金属材料
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介电材料
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电子陶瓷
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固态化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kai Xia,Rui Liang,Yi Luo,Anqiao Zheng,Guodong Jiang,Mingxia Fan,Jian Xiong,Songdong Yuan
A series of LiFe 0.7 Mn 0.3−x Mg x PO 4 /C (x = 0, 0.02, 0.05, and 0.08) cathode materials were synthesized by a high-temperature solid-phase method and characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical tests to determine the structural, morphological, and electrochemical properties of the synthesized materials. The experimental results showed that the small amount of Mg 2+ doping not only had no effect on the crystalline structure of the material but also significantly improved the electrochemical properties of the material. The LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C material achieved specific discharge capacities of 163.2, 155.2, 149.1, and 142.0 mAh/g at 0.1C, 0.2C, 0.5C, and 1C, respectively, and a capacity retention rate of 98.6% after 50 cycles at 0.1C. It exhibited excellent rate performances and cycling stability. Electrochemical alternating-current impedance showed that the lithium-ion diffusion coefficient of the LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C sample reached 1.19 × 10 −13 cm 2 /s, which was 4.1 times higher than that of the pre-modified sample. Combined with the cyclic voltammetry test results, it was found that the appropriate amount of Mg 2+ doping could reduce the impedance and polarization of the material as well as increase the conductivity and the lithium-ion diffusion rate, ultimately improving the electrochemical properties.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruiyao Wang,Chongyi Li,Yuxi Zhang,Dan Zeng,Dandi Fan
Bacterial infection is the most common problem in wound healing, and the severe inflammatory response it triggers can significantly increase associated complications and delay the healing process. Consequently, developing effective antimicrobial wound dressings presents a substantial challenge. Herein, a versatile hydrogel namely PVA/POA-MX@Mg 2+ was fabricated on the basis of Polyvinyl alcohol (PVA), phenyl boric acid (PBA)-grafted oxidized hyaluronic acid (POA), and magnesium coated MXene nanosheets (MXene@Mg 2+ ). The hydrogel features reversible borate ester bonds for automatic repair and self-healing, adapting to complex wounds, while residual aldehyde groups enhance its adhesiveness. It was observed that increasing the proportion of aldehyde groups in the hydrogel system enhances its adhesion continuously, with the strength reaching up to 45 kPa. Besides, the PVA/POA-MX@Mg 2+ hydrogel exhibits excellent electrical conductivity, and effective photothermal antibacterial properties under near-infrared (NIR) light irradiation, achieving antibacterial efficiencies of approximately 97.6 % against E. coli and 99.1 % against S. aureus. Furthermore, the photothermal capabilities of the hydrogel significantly enhance the healing of bacterial-infected wounds when combined with NIR stimulation. On day 14, treatment using the PVA/POA-MX@Mg 2+ hydrogel under NIR irradiation resulted in a wound healing rate of 99.6 %. This improvement is attributed to the hydrogel’s potent anti-inflammatory effects, promotion of cell proliferation, and facilitation of angiogenesis. This study underscores the pivotal role of multifunctional two-dimensional (2D) MXene@Mg 2+ nanocomposites in treating infected wounds. In summary, the PVA/POA-MX@Mg 2+ hydrogel demonstrates high antibacterial efficiency, suitable conductivity, excellent self-healing properties, and favorable biocompatibility, making it a promising candidate for wound healing dressings in treating infected skin wounds.
研究领域:
生物材料学
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医学工程
·
皮肤修复研究
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Ketai Ren,Jinkai Qiu,Honglai Liu,Hongfang Song,Quan Li,Jingkun Li
Fluorophosphate Na3V2(PO4)2F3 (NVPF) is considered a promising cathode material for sodium-ion batteries, while its specific capacity is still insufficient compared to that of cathodes of lithium-ion batteries. Activating the third Na+ effectively increases the specific capacity of NVPF. However, the accompanied irreversible phase transition deteriorates the cycling stability. In this study, we synthesized sodium-rich Na3.5V1.5Mg0.5(PO4)2F3 (NVMPF) through doping low-valence Mg2+ with a high content, which introduces an extra 0.5 Na+ in the crystal lattice. The extra 0.5 Na+ remains in the lattice of NVMPF, acting as “pillars” to suppress the irreversible phase transition after the third Na+ is extracted by activating the V5+/4+ redox couple at a high voltage. Thus, NVMPF achieves a specific discharge capacity of 170 mAh g–1 between 1.0 and 4.7 V while maintaining the tetragonal structure of NVMPF. This work offers insightful guidelines to achieve the full utilization of three Na+ with enhanced cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhongbiao Wang,Zhanyun Yang,Xin Shi,Qing Zhang,Wenzhong Ma,Qiuyan Bi,Yakai Lin
Achieving a balance between high water permeability and excellent ion separation performance remains a significant challenge for traditional nanofiltration (NF) membranes due to the inherent trade-off between permeability and selectivity. This study proposes an innovative modification strategy involving dopamine (DA)-functionalized ball-milled graphitic carbon nitride (BM-g-C 3 N 4 ), leading to the successful fabrication of high-performance NF membranes. The ball-milling process significantly improves the dispersibility of g-C 3 N 4 , while DA functionalization enhances the hydrophilicity of the membrane surface and the adhesion to the substrate. The results demonstrate that the incorporation of DA functionalized BM-g-C 3 N 4 (DA@BM-g-C 3 N 4 ) effectively reduces defects in the separation layer and provides additional water transport channels. The modified membrane exhibited outstanding separation performance, with the separation factor (SF) increasing from 13.77 to 22.42 and permeation flux improving from 9.9 L/(m 2 ·h) to 17.54 L/(m 2 ·h), tested in a 2.0 g·L −1 MgCl 2 /LiCl mixed salt solution. Furthermore, the fabricated NF membranes showed excellent ion separation efficiency and long-term operational stability, with the rejection rate of Mg 2+ remaining stable between 92.74 % and 97.78 % after 200 h of continuous operation.
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
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Rongrui Deng,Shuangshuang Tan,Zhongting Wang,Rong Li,Guanjie Lu,Baihua Qu,Le Tong,Ronghua Wang,Chaohe Xu,Guangsheng Huang,Jingfeng Wang,Aitao Tang,Xiaoyuan Zhou,Fusheng Pan
Magnesium-ion batteries (MIBs) have great potential in large-scale energy storage field with high capacity, excellent safety, and low cost. However, the strong solvation effect of Mg2+ will lead to the formation of solvated ions in electrolytes with larger size and sluggish diffusion/reaction kinetics. Here, the concept of interfacial catalytic bond breaking is first introduced into the cathode design of MIBs by hybriding MoS2 quantum dots with VS4 (VS4@MQDs) as the cathode. The “in situ dynamic catalysis and re-equilibration” effects can catalyze the Cl–Mg bond breaking and trigger single Mg2+ insertion/extraction chemistries, which can significantly accelerate the diffusion and reaction kinetics, as verified by the decreased diffusion energy barriers (0.26 eV for Mg2+ vs 2.47 eV for MgCl+) and fast diffusion coefficient. Benefitting from these dynamic catalysis effects, the constructed VS4@MQD-based MIBs deliver a high discharge capacity of ∼120 mA h g–1 at 200 mA g–1 and a long-term cyclic stability of 1000 cycles at 1 A g–1. The improved performance and detailed characterizations well prove that the active ions in MIBs change from MgCl+/Mg2Cl3+ to Mg2+ with fast kinetics.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chenxi Tian,Da Lei,Yongchao Qian,Xiang-Yu Kong,Zhong Liu
The development of advanced membranes with precise ion selectivity is essential for efficient Li + /Mg 2+ separation. In this study, we synthesized a novel Lys-TMC membrane via a nucleophilic addition reaction between Lysine and trimesoyl chloride (TMC), yielding in a negatively charged surface interconnected by amide bonds. We systematically investigated the effects of varying Lys:TMC ratios on the membrane’s chemical structure, surface morphology, and ion separation performance. Our results revealed that the degree of cross-linking increases initially with the Lysine content, reaching an optimum at a Lys:TMC ratio of 10:1, where the membrane exhibited prominent Turing patterns on its surface. These patterns were critical for achieving effective ion separation. In contrast, excessive Lysine led to spontaneous polymerization, resulting in irregular ‘stone-like’ structures and the loss of Turing patterns. The optimally cross-linked Lys-TMC membrane displayed superior Li + /Mg 2+ separation performance, highlighting the crucial role of controlled cross-linking and Turing structure formation in enhancing ion selectivity. This work provides a mechanistic understanding of the relationship between Turing structure formation and ion sieving performance, offering a promising strategy for designing advanced separation membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
·
离子分离
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2016
·Vol. 42
·期 8
·6681-6693
·
IF 1.833
Zhang Qin,Wang Hongqing,Wang Yuyuan,Jing Pengfei,Luo Aoheng,Huang Qiao
A new Schiff base fluorescence probe, 3-Allylsalicylaldehyde salicylhydrazone (L), for Mg 2+ was designed and synthesized. The fluorescence of the sensor L was enhanced remarkably by Mg 2+ with 2:1 binding ratio, and the binding constant was determined to be 1.02 × 10 7 M −1 . Probe L had high sensitivity for Mg 2+ in a solution of DMF/water (4:1, v/v, pH 7.5), and the detection limit was 4.88 × 10 −8 mol/L. Common coexistent metal ions, such as K + , Na + , Ag + , Ca 2+ , Zn 2+ , Ba 2+ , Bi 2+ , Cu 2+ , Ni 2+ , Hg 2+ , Fe 3+ , and Al 3+ , showed little or no interference on the detection of Mg 2+ in solution. The fluorescence probe L, which was successfully used for the determination of trace Mg(II) in real samples, was shown to be promising for liquid-phase extraction coupled with fluorescence spectra.
研究领域:
分析化学
·
生物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）