Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Yongyang Zhu,Mili Liu,liming Zeng,Yin Wang,Daifeng Wu,Rui Li,Qing Zhou,Renheng Tang,Fangming Xiao
The hydrolysis of MgH 2 delivers high hydrogen capacity (15.2 wt%), which is very attractive for real-time hydrogen supply. However, the formation of a surface passivation Mg(OH) 2 layer and the large excess of H 2 O required to ensure complete hydrolysis are two key challenges for the MgH 2 hydrolysis systems. Now, a low-cost method is reported to synthesize MgH 2 @Mg(BH 4 ) 2 composite via ball-milling MgH 2 with cheap and widely available B 2 O 3 (or B(OH) 3 ). By adding small amounts of B 2 O 3 , the in-situ formed Mg(BH 4 ) 2 could significantly promote the hydrolysis of MgH 2 . In particular, the MgH 2 –10 wt% B 2 O 3 composite releases 1330.7 mL·g −1 H 2 (close to 80% theoretical hydrogen generation H 2 ) in H 2 O and 1520.4 mL·g −1 H 2 (about 95%) in 0.5 M MgCl 2 in 60 min at 26 °C with hydrolysis rate of 736.9 mL·g −1 ·min −1 and 960.9 mL·g −1 ·min −1 H 2 during the first minute of the hydrolysis, respectively. In addition, the MgCl 2 solution allows repeated use by filtering and exhibits high cycle stability (20 cycles), therefore leading to much reduced capacity loss caused by the excess H 2 O. We show that by introducing B 2 O 3 and recycling the 0.5 M MgCl 2 solution, the system hydrogen capacity can approach 5.9 wt%, providing a promising hydrogen generation scheme to supply hydrogen to the fuel cells.
研究领域:
材料科学
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能源化学
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无机合成
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氢能技术
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表面工程
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ENERGY & FUELS
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2025
·
IF 5.3
Hao Li,Zhuo Chen,Rongxin Xia,Ze Zhang,Junhu Zhou,Yu-You Li,Jun Cheng
To simultaneously promote both direct (via electron carriers) and indirect electron transfer (via hydrogen carriers) in the microbial electroreduction of CO2 to CH4, FeCoCrNiMo high-entropy alloys (HEAs) combined with methanogens were proposed herein. Experimental results showed that spherical HEA heterostructures significantly enhanced the electrical conductivity and catalytic activity. FeCoCrNiMo HEAs increased the abundance of hydrogenotrophic methanogens (e.g., Methanobacterium) and electroactive bacteria (e.g., Ureibacillus), as well as the expression of conductive pilus-associated gene (pilA) to promote electron transfer. FeCoCrNiMo HEAs also increased the content of aromatic proteins and tryptophan in extracellular polymeric substances, enhancing biofilm conductivity, while the uniform dispersion of the five metal elements reduced both biofilm resistance and charge transfer resistance. Therefore, HEAs enhanced the maximum methane production rate by 6.58 times (2.17 mmol L–1 day–1) with 90.6% faradaic efficiency. This study demonstrated that FeCoCrNiMo HEAs promoted electron shuttling efficiency, biofilm electroactivity, and stability, highlighting their potential as multifunctional promoters for driving CO2 reduction to methane.
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Journal of Energy Storage
·
2025
·
IF 9.8
Xianhui Dong,Yan Wang,Shubin Song,Jiabin Fu,Na Li,Yan Wang,Junrong Yu,Zuming Hu
Polymer dielectrics, as a crucial component for energy storage in film capacitors, exhibit significantly deteriorated capacitive performance at elevated temperatures owing to the sharp increase in leakage current density, which remains a great challenge for their application under harsh environments. Herein, we design a bilayer-structured composite dielectric with an inorganic coating, achieved via spraying two-dimensional (2D) MgO nanosheets with wide bandgap onto the surface of polyetherimide (PEI) film. Combining all experimental and simulated results, it is confirmed that the constructed MgO layer significantly increases the barrier height at the dielectric/electrode interface, reduces the leakage current density and suppresses the propagation of breakdown paths, therefore effectively enhancing the high-temperature energy storage performance of the designed bilayer PEI dielectric. Accordingly, the optimized bilayer dielectric delivers an excellent discharge energy density of 6.15 J/cm 3 with a charge-discharge efficiency of 80.0 % at 150 °C. Even at 200 °C, it can still achieve a high discharge energy density of 3.95 J/cm 3 with an efficiency of 76.2 %, and maintain outstanding operational reliability after repeating 100,000 charge-discharge cycles. This work provides a new insight for designing high-temperature PEI dielectric capable of operating under challenged environments and demonstrates great potential for scalable fabrication.
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Fan Li,Xiumin Yang,Zaolong Zhang,He Xiao,Junlian Wang
To address the third-phase formation and high-acidity stripping corrosion of the traditional TBP-FeCl₃ system for Li extraction from high Mg/Li ratio salt-lake brines, this study developed a TBP-MNPK-kerosene-FeCl₃ system using 2-heptanone (MNPK) as a modifier. MNPK eliminated third-phase formation and enabled complete phase separation within 50s. Under optimal conditions (20 vol % kerosene, 40 vol % TBP), Li extraction efficiency reached 85.4 % with a Li/Mg separation factor of 315. After water scrubbing and 3 mol/L HCl stripping, the stripping solution had 5.46 g/L Li (3.12-fold enrichment) and Li/Mg ratio of 11.38. This system provides an efficient, industrial-feasible Li extraction solution.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Like Wang,Peiyan Feng,Bo Liu,Shuheng Wei,Peng Tang,Shouwei Yin
Novel phase-change Pickering emulsion microcapsules (PCPEs) were constructed using tannic acid (TA)-modified zein nanoparticles (T-zein) and a lauric acid/stearic acid eutectic (LS) to encapsulate β-carotene. The grafting of TA tuned the wettability of zein nanoparticles, enabling stable emulsification at 50 °C. Subsequent cooling resulted in microcapsules with a T-zein shell and crystalline core (LS), achieving an encapsulation efficiency of 88.15 %. The solidified oil phase restricted molecular migration, while interfacial T-zein provided dual protection, reducing β-carotene degradation under UV irradiation and auto-oxidation by 57.19 % and 67.88 %, respectively, compared with liquid-core emulsions. In vitro digestion studies showed that phase change triggered by physiological temperature enabled controlled release. PCPEs displayed superior gastric stability and resistance to coalescence in the intestine, enhancing the bioaccessibility of β-carotene to 42.57 % (36 % higher than liquid-core emulsions and 298 % of the free control). Overall, this solid-core engineering strategy presents a novel platform for the rational design of emulsion for targeted delivery of lipophilic bioactives.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Jiaqing Zhang,Yong Long,Xuetong Duan,Jiyan Li,An Li
The intermittent nature of solar energy supply causes photothermal materials in interfacial evaporation systems to be unable to achieve continuous and stable photothermal conversion and water supply functions. To this end, this paper constructs a Janus composite membrane (MSHS@TDA@PAN) with both photothermal conversion and thermal energy storage capabilities through electrospinning. In MSHS@TDA@PAN, MgO/Pt multi-shell hollow microspheres impregnated with tetradecylamine (TDA) form a hydrophobic photothermal layer, while hydrophilic polyacrylonitrile (PAN) nanofibers act as a water-transporting layer, together driving efficient photothermal interfacial evaporation. It achieves an intrinsic light absorption of 80.7 %, a photothermal conversion efficiency of 79.83 %, and a phase change enthalpy of 90.7 J·g −1 . Experimental results show that the average evaporation rate of the photothermal membrane over one phase change cycle (One hour each for solar irradiation and dark field) is increased from 2.402 kg·m −2 of the membrane without phase change materials to 2.67 kg·m −2 . It can increase the production of fresh water by 3.24 kg·m −2 ·d −1 . Especially under no-light conditions, the evaporation rate of MSHS@TDA@PAN is 2.1 times that of the control group, which significantly alleviates the performance attenuation caused by intermittent illumination. In conclusion, MSHS@TDA@PAN effectively solves the intermittency problem of solar energy utilization through the synergistic mechanism of photothermal conversion, thermal energy storage and continuous heat release. It has application prospects in the fields of continuous seawater desalination and photothermal utilization.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangyu Han,Zuozhu Yin,Yingping Yang,Haitao Yang,Jilin Xu,Zhen Hong,Chan Xie,Yidan Luo,Mingshan Xue
Existing aero-engine filters are susceptible to clogging by water, oil, microplastics and other contaminants under complex operating conditions, resulting in reduced filtration efficiency and shorter maintenance intervals. Therefore, there is an urgent need to develop a multifunctional superhydrophobic material that can efficiently separate oil and water and adsorb pollutants. Based on this, we prepared a multifunctional superhydrophobic nonwoven fabric made of ethylene-propylene side by side (ES) fiber, polyethylene terephthalate (PET) fiber, multi-walled carbon nanotubes (MWCNTs) and Mg Fe layered double hydroxide (Mg Fe LDH). This multifunctional fiber-based nonwoven fabric imitates the rough structure of the surface of salvinia natans through bionic design, which shows excellent hydrophobic performance, and the water contact angle can be as high as 160 ± 2°. At an ambient temperature of 70 °C, the oil-water separation efficiency can reach 98.8 % by thermal radiation. The oil-water separation efficiency was 98 % when the material was irradiated by halogen lamps simulating infrared light, and 97 % at ambient temperature without any light. Compared with the modified polyurethane sponge widely used for oil-water separation, the super hydrophobic multi-functional non-woven fabric has three advantages. Firstly, modified polyurethane sponge only performs a single function: oil-water separation, while superhydrophobic multifunctional non-woven fabric can achieve synergistic effects of photothermal oil-water separation, organic pollutant degradation, and microplastic extraction. In addition, the mechanical and chemical stability of superhydrophobic multifunctional non-woven fabric is stronger, which means that it has greater potential for application in aircraft engines under harsh working conditions. Finally, the preparation of multifunctional non-woven fabrics is very simple and has the potential for large-scale production.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Wentian Zhang,Huan Xu,Lichao Xia,Shanshan Zhao
Thin film composite nanofiltration (NF) membranes have a wide range of applications in drinking water production and industrial wastewater treatment. However, their performance is constrained by the inherent trade-off between permeability and selectivity, which can be effectively alleviated by regulating interfacial polymerization (IP). In this study, a zwitterionic copolymer (ZPSA), synthesized via one-step free radical polymerization using sulfobetaine ([2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide) and allylamine hydrochloride monomers, was utilized as an aqueous additive to regulate the IP processes for the fabrication of high-performance NF membranes. Adding zwitterionic copolymer retarded the diffusion rate of piperazine monomers due to electrostatic interaction and steric hindrance, resulting in an ultra-thin and relatively loose polyamide selective layer with enhanced surface hydrophilicity. Notably, incorporating zwitterionic copolymer significantly improved water permeability and maintained high rejection of divalent anions. The optimized membrane (i.e., ZPSA-1.5) achieved a water permeability around 18.8 L m −2 h −1 bar −1 , which was threefold higher than that of the control membrane, along with 98.0 % Na 2 SO 4 rejection. Additionally, the X-ray photoelectron spectroscopy results suggest that the added hydrophilic ZPSA could hinder PIP diffusion rate and decrease its reaction rate at interface, which was further confirmed by molecular simulation. The ZPSA-regulated membrane enhanced water permeability while preserving salt rejection, demonstrating its potential for nanofiltration applications.
研究领域:
材料科学
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膜技术
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环境工程
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高分子化学
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水处理
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DOI
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Hang Lu,Fei Huang,Wenting Zhao,Zhuoying Shan,Qingdong He,Jingyu Zhang,Wenbo Wang
A sustainable strategy was developed to convert graphite tailings (GT), a solid waste, into a hierarchical porous silicate adsorbent with engineered multiple active sites (denoted as GTPM12h) through an integrated mechanochemical-hydrothermal route for efficient decontamination of organic dye wastewater. The reconstructed silicate phases are enriched with oxygen-containing functional groups and metal active sites, resulting in remarkably enhanced adsorption performance. GTPM12h exhibits superior adsorption capacities of 379.76 mg·g −1 for methylene blue and 487.57 mg·g −1 for methyl violet over a broad pH range (5–9), outperforming most commercial activated carbons. At a low dosage (0.6 g·L −1 ), the removal efficiency of dyes exceeds 99.9 % in both single and ternary mixed dye systems and remains at 92.4 % after five cycles. The adsorption process follows a chemisorption-dominated monolayer mechanism driven by synergistic electrostatic attraction, hydrogen bonding, and ion exchange. This study presents an eco-friendly strategy addressing dual environmental challenges: upcycling industrial waste and remediating water pollution.
研究领域:
环境科学
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材料科学
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废物管理
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水处理
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吸附技术
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Meixue Song,Chunyue Zhang,Xuanle Lv,Qingquan Wei,Junyu Lin,Yapeng Wang,Zheng Wang,Dan Meng,Feng Zhang
A dual-surfactant modification strategy was developed to synergistically enhance the flame retardancy and smoke suppression of epoxy resin (EP) by co-modifying Mg-Al layered double hydroxide (LDH) with sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS). This dual-surfactant approach is novel as it integrates two distinct functionalities—linear alkyl chain compatibility provided by SDS and aromatic sulfonate-induced charring contributed by SDBS—resulting in a synergistic improvement in LDH dispersion, interfacial bonding, and catalytic char formation, thereby achieving superior fire safety performance in EP composites. The modified SDS + SDBS-LDH was synthesized via a green ion-exchange route and uniformly dispersed in EP at a loading of 5 wt%. In cone calorimeter tests, total heat release and total smoke production decreased by 33.3% and 22.9%, respectively, while CO and CO 2 release rates dropped by 75.8% and 48.7% compared with pure EP. When applied as a coating, EP/5SDS + SDBS-LDH reduced the back-surface temperature of wood by 76.1%, demonstrating excellent thermal insulation and practical potential. This work provides a scalable and eco-friendly strategy for designing high-performance, flame-retardant epoxy composites through synergistic dual-surfactant modification of LDH.
研究领域:
材料科学
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聚合物复合材料
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火灾安全工程
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纳米材料
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阻燃材料
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 6
·1598-1605
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IF 1.1
Zhou Peilin,Liang Huasong,Li Wenbiao,Chen Wenzhuo,Ji Yuchun,Li Zhengde,Wang Jilin
A highly thermally conductive magnesium borate/boron nitride (A-MBN) composite whisker was developed which was surface functionalized by (3-Aminopropyl)triethoxysilane. Its growth mechanism was proposed. Then, A-MBN/epoxy composites were prepared. When the A-MBN content is 8wt%, the thermal conductivity of the A-MBN/EP composite is 0.61 W·m −1 ·K −1 , which is 230% higher than that of pure EP. At the same time, the tensile strength of the composite material is 85.4% higher than that of the pure EP, and it also maintains excellent electrical insulation property. Finally, the infrared imaging test verifies the excellent heat dissipation performance of the composite material, indicating that the composite material has broad application prospects in the field of thermal conductive materials.
研究领域:
材料科学
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聚合物复合材料
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热管理材料
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纳米材料
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电子封装
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Guohuan Li,Min Liu,Xin Wu,Wenjun Guo,Qingyuan Liu,Jia Tian,Donghui Wang,Longhua Xu,Zhoujie Wang
Serpentine is easily activated by metal ions and floats upward into the concentrate in the flotation separation of copper-nickel sulfide ores, resulting in increased MgO content, which seriously affects the downstream smelting process. However, the specific adsorption mechanisms of metal ions on serpentine surfaces remain unclear, resulting in a challenge in the modulation of serpentine flotation behavior. In this work, the effect of inevitable divalent metal ions (e.g., Mg(Ⅱ), Ca(Ⅱ), and Cu(Ⅱ)) on serpentine floatability was systematically investigated. Flotation results showed that serpentine without treatment with divalent metal ions has weak floatability, whereas the introduction of divalent metal ions increased serpentine flotation recovery by ∼10 % after Ca or Mg treatment and ∼15 % after Cu species treatment. Spectroscopic and surface topography imaging analysis revealed imaging revealed that Mg(Ⅱ) exhibited weak adsorption, primarily in the outer sphere, on the Mg-OH plane; whereas Ca(Ⅱ) tends to adsorb onto the edge planes. Notably, Cu(Ⅱ) demonstrated the strongest adsorption ability, binding with O − residue on the Mg-OH plane and edge planes via Cu–O bonds. Density functional theory calculations also revealed an increasing order of collector adsorption affinity: Cu(Ⅱ) > Ca(Ⅱ) > Mg(Ⅱ). Therefore, serpentine after Cu treatment can provide more sites for the adsorption of collectors, enhancing its floatability of serpentine. This study provides molecular interaction mechanisms of inevitable ion adsorptions on serpentine surfaces, which can offer theoretical guidance for chemical additives design and surface reaction control in minerals separation processes.
研究领域:
矿物加工
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表面科学
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浮选化学
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环境地球化学
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计算材料科学
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危险品化学品经营许可证（带存储）