COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Feng Wei,Anjun Shi,Guangxing Huang,Haidong Gu,Yinsi Gan,Jianan Song
Ice-templated assembly can organize two-dimensional and one-dimensional fillers into oriented networks, providing an effective strategy for constructing thermally conductive pathways in polymer composites. However, conventional two-dimensional fillers, such as graphene and MXene, are prone to curling, restacking, and aggregation, which compromises network continuity and thermal transport efficiency. In contrast, Al flakes possess high thermal conductivity, a high aspect ratio, and resistance to curling, but their surface oxidation and poor water dispersibility limit their application in ice-templated assembly. Herein, surface modification with silicon dioxide (SiO 2 ) was first introduced onto Al flakes to improve their dispersibility in water and mitigate surface oxidation. The resulting flakes (Al@SiO 2 ) were then combined with silicon carbide nanowires (SiCNWs) to form oriented hybrid filler networks in silicone rubber (SR) through ice-templated assembly, followed by interfacial modification using a polysiloxane-based modifier. The best-performing composite achieved a through-plane thermal conductivity of 4.49 W·m −1 ·K −1 at an Al@SiO 2 /SiCNW loading of 6.54 wt% (2.60 vol%). Theoretical modeling evaluated the contribution of Al@SiO 2 flakes and SiCNWs to thermal transport, while finite-element simulations confirmed that the oriented hybrid networks promoted continuous heat transfer. The composites also exhibited excellent heat-dissipation capability and thermal stability. This work provides an effective strategy for constructing highly efficient thermally conductive networks in polymer composites. Download: Download high-res image (223KB) Download: Download full-size image
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
G.D. Lai,H. Niu,K. Li,L. Lu,Y. Cai,Y.L. Bian,H.W. Chai
The deformation and damage mechanisms of aluminum/polytetrafluoroethylene (Al/PTFE) composites under quasi-static compression are critical for aerospace, defense and structural applications, yet their mesoscale behavior remains insufficiently understood. This study combines in situ synchrotron X-ray micro computed tomography (CT) with CT-based finite element method (FEM) simulations to dynamically resolve the interplay between microstructure evolution and mechanical response. Real-time 3D imaging reveals negligible contributions of initial voids to bulk deformation, while catastrophic failure is governed by shear-induced interfacial debonding between Al particles and progressive void coalescence. Mesoscale FEM simulations quantify stress localization on Al particles, demonstrating its dependence on particle alignment relative to the loading direction. Damage initiates exclusively when adjacent particles deviate from the loading direction, underscoring the pivotal role of microstructural heterogeneity. These findings provide new insights into mesoscale structure–property relations in Al/PTFE composites, and the combined methodology of in situ CT experiments and CT image-based FEM simulations offers potential for advancing mechanistic studies of multiphase composites under complex mechanical conditions.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Tuo Li,Junjie Ge,Xiaoying Li,Yinliang Wang,Liuxue Wang,Lei Zhang,Jun Xiang,Guiying Tian,Penggao Cheng,Na Tang
Lithium, a critical metal for green energy storage, is in surging global demand, yet its extraction from salt-lake brines with high Mg 2+ /Li + ratios faces severe technical and ecological challenges ( e.g. , low selectivity, acid washing-induced environmental damage). Herein, a bio-inspired Li + sieve membrane was developed by in situ growing Li–Al layered double hydroxide (Li/Al-LDH) on polyacrylonitrile (PAN) supports, addressing the above bottlenecks for sustainable Li-extraction from original brines. Integrated into a flat-sheet membrane module, the LDHs@PAN membrane exhibited exceptional Li-extraction performance with high Li + selectivity, rapid adsorption kinetics, and outstanding regenerability in real high Mg 2+ /Li + brine. The in situ grown LDHs form a robust organic-inorganic interface, which not only enhances the areal adsorption capacity and cycling stability but also enables fast on-site reconstruction of the degraded membrane. Notably, the membrane realizes Li + desorption via simple water washing (no acid usage), protecting the fragile ecological environment of salt-lake areas. This work provides an eco-friendly and scalable strategy for lithium recovery from original brine, supporting the sustainable supply of lithium for green energy systems and overcoming the fundamental limitations of industrial Al-based absorbents.
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高影响因子
JOM
·
2017
·Vol. 69
·期 10
·1963-1969
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IF 1.86
Xie Kaiyu,Shi Zhongning,Xu Junli,Hu Xianwei,Gao Bingliang,Wang Zhaowen
Aluminothermic reduction-electrolysis using an inert anode process is proposed to extract oxygen and metals from Minnesota Lunar Simulant-1 (MLS-1). Effective aluminothermic reduction between dissolved MLS-1 and dissolved metal aluminum was achieved in cryolite salt media. The product phases obtained by aluminothermic reduction at 980°C for 4 h were Al, Si, and Al 5 FeSi, while the chemical components were 79.71 mass% aluminum, 12.03 mass% silicon, 5.91 mass% iron, and 2.35 mass% titanium. The cryolite salt containing Al 2 O 3 was subsequently electrolyzed with Fe 0.58 -Ni 0.42 inert anode at 960°C for 4 h. Oxygen was evolved at the anode with an anodic current efficiency of 78.28%. The results demonstrate that this two-step process is remarkably feasible for the extraterrestrial extraction of oxygen and metals. This process will help expand the existing in situ resource utilization methods.
研究领域:
空间资源利用
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提取冶金
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电化学
·
月球探测
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
·
IF 5.2
Yuwen Gao,Shougui Wang,Fei Gao,Changqing Guo,Jipeng Dong,Guanghui Chen
The Li 1.6 Mn 1.6 O 4 driven lithium ion-sieve (LIS) is considered as a potential adsorbents for recovering Li + ions from brines owing to their good theoretical adsorption performance and excellent adsorption selectivity. However, the poor cycle stability and the decrease of adsorption capacity resulting from the manganese dissolution loss limit its practical applications. In this work, to mitigate this issue, several novel Al and Cr co-doped manganese LISs were prepared by a facile hydrothermal synthesis method, followed by the acid treatment. The characterization results show that Al and Cr ions are uniformly doped into the spinel crystal structure of LIS, and the introduction of Al and Cr ions can cause the crystal shrinkage, decrease the Mn 3+ content, and raise the mean valence of manganese in the co-doped samples, effectively improving their structural stability. Compared with un-doped ion-sieve H 1.6 Mn 1.6 O 4 , the optimal co-doped ion-sieve H 1.6 Mn 1.54 Al 0.02 Cr 0.04 O 4 with 2% Al doping and 4% Cr doping possesses a higher lithium adsorption capacity, lower manganese dissolution loss, and stronger cyclic stability. Additionally, the H 1.6 Mn 1.54 Al 0.02 Cr 0.04 O 4 possesses a high adsorption selectivity of Li + over Mg 2+ , Ca 2+ , K + and Na + . Furthermore, the lithium adsorption is determined to be a chemical and monolayer adsorption process on the prepared LIS. The good lithium adsorption capacity and adsorption selectivity as well as the good recyclability make the prepared Al and Cr co-doped LIS a promising adsorbent for the efficient lithium recovery form brines.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yifan Zhang,Xianwei Hu,Fengguo Liu,Jiaxin Yang,Liyu Chen,Wenju Tao,Aimin Liu,Zhongning Shi,Zhaowen Wang
In the present study, the reaction process and reaction mechanism of the aluminothermic reduction of NaVO 3 to prepare aluminum-vanadium intermediate alloy were investigated by experimental analysis and quantum chemical calculations. The results of thermal analysis and isothermal experiments indicated that the aluminothermic reduction of NaVO 3 was a multi-step process and temperature played a critical role in this process. The aluminum-vanadium intermediate alloy was generated when the temperature exceeded 963 ºC, and it could be further separated from the reduction product after the addition of slag-forming agents (CaO and CaF 2 ) at 1600 ºC. Furthermore, an atomic-level insight into the reaction between aluminum and NaVO 3 was explored based on the electrostatic potential (ESP) analysis of the reactivity of NaVO 3 . The results showed that the aluminum atom first interacted with NaVO 3 to form an intermediate complex through electrostatic interaction , and then NaVO 3 was reduced to NaVO 2 under the continuous action of aluminum. Further, the newly formed NaVO 2 was consequently converted to aluminum-vanadium intermediate alloy under the continuous action of aluminum atoms. These theoretical results were essentially consistent with the experimental data, which provided a fundamental understanding about the reaction mechanism of NaVO 3 with Al. Moreover, the aluminothermic reduction of NaVO 3 also provided a feasible and environmentally friendly metallurgical approach for preparing aluminum-vanadium intermediate alloy.
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ChemistrySelect
·
2022
·Vol. 7
·期 40
·e202203035
·
IF 2.307
Yuxiu Fu,Yaming Pang,Yinan Zheng,Xiaoli Song,Liguo Gao
Graphical Photocatalysts enhance the ability to absorb low-energy photons due to the reduction of the band gap. Through the photocatalytic mechanism, it is known that when there is irradiation with light (hv) energy entering Mg 2+ -Mo 6+ -Al 3+ -MoO 4 2− -Layered double hydroxides (LDHs), highly active hole-electron pairs will be generated, and a large amount of ⋅OH will be generated after the reaction, which can completely oxidize the phenol in water into CO 2 and H 2 O. Mg 2+ -Mo 6+ -Al 3+ -MoO 4 2− -Layered double hydroxides (LDHs) materials were successfully prepared via a hydrothermal method by doping Mo 6+ in hydroxide laminates and inserting MoO 4 2− to replace the interlayer anions of LDHs materials. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared spectrometer (FTIRS) and ultraviolet-visible spectrophotometer (UV). The electronic density of states was calculated using the density functional theory (DFT) of Vienna Ab-initio Simulation Package (VASP). The effects of Mo 6+ and MoO 4 2− on the structure, morphology, electronic structure and photocatalytic performance of Mg 2+ -Al 3+ -LDHs were systematically studied. The conditions for phenol degradation by Mg 2+ -Mo 6+ -Al 3+ -MoO 4 2− -LDHs were optimized by single factor analysis and response surface methodology. The results show that the MoO 4 2− anion reduces the band gap width and thus enhances the absorption of low-energy photons. The interaction between cations and anions enhances the photocatalytic performance. When the dosage of Mg 2+ -Mo 6+ -Al 3+ -MoO 4 2− -LDHs was 0.03 g, the temperature was 40 °C and the visible light irradiation was 15 min, the removal rate of phenol reached 94.76 %.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 9
·6262-6272
·
IF 2.779
Guo Xiaogang,Liang Taotao,Liu Guixiu,He Yuanzhen,Kong Shuying,Islam Md. Labu,Yuan Binfang
Achieving controllable film-forming process is always a difficult issue for practical application, especially for bi-/multiple component composite materials. Thus, this paper firstly developed a conveniently and controllable electrophoretic assembly technique under mild conditions to design nano-Al-doped@Co 3 O 4 energetic film with wide potential applications. The stable suspension consists of isopropyl alcohol with the tracing of polyethylenimine and tween 80. The high crystallinity and uniformity of structure in target films were demonstrated by FESEM, EDX, XRD, and FT-IR techniques. Electrophoretic assembly dynamics of Al/Co 3 O 4 particles were deeply explored to provide a theoretical foundation for optimizing exothermic performance. The exothermic performance of target film can be accurately adjusted, and the output of heat ( Q ) and activation energy ( E a ) can reach up to ~ 3.6 kJ/g (close to 85% of theoretical value) and low to 230.01 kJ/mol, respectively. This breakthrough will substantially push forward the facile functional film-forming process of different kinds of particles used in fields of electronics, military, aviation, etc.
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Nanoscale
·
2022
·Vol. 14
·期 6
·2427-2433
·
IF 8.307
Shangchun Lv,Mengxi Pei,Yuxiang Liu,Zhichun Si,Xiaodong Wu,Rui Ran,Duan Weng,Feiyu Kang
Hydrogen production from overall water splitting using SrTiO3(Al)-based semiconductors is one of the most promising routes to address energy and environmental concerns. Noble metals are needed to accelerate water splitting by promoting the charge transfer and providing active sites. However, noble metal-based catalysts have high prices and rare resources. Herein, we demonstrate a strategy to construct highly active CoxP/SrTiO3(Al) for overall water splitting. Hydrothermal method followed by an ultrasonic process was applied to prepare CoxP dots, which were loaded on the whole surface of SrTiO3(Al) as bifunctional cocatalysts. Interestingly, the CoxP dots on the (110) planes of SrTiO3(Al) were partially oxidized for the OER reaction. However, CoxP dots on the (100) planes of SrTiO3(Al) for HER kept it as it was. The as-prepared CoxP/SrTiO3(Al) photocatalyst shows a stable HER rate of 1.36 mmol−1 h−1 and OER rate of 0.635 mmol−1 h−1. The strong interaction between CoxP and SrTiO3(Al) not only facilitates rapid charge separation but also provides a highly active site for overall water splitting. Our study provides a valuable method for constructing noble-metal-free SrTiO3(Al)-based photocatalysts.
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PubMed
高影响因子
COMBUSTION AND FLAME
·
2022
·
IF 5.767
Wen Ao,Zhan Wen,Lu Liu,Yang Wang,Yu Zhang,Peijin Liu,Zhao Qin,Larry K.B. Li
In this experimental study, we explore how the combustion and agglomeration characteristics of solid propellants can be modified by replacing aluminum with ternary Al/CuO/PVDF(Polyvinylidene Fluoride) metastable intermolecular composites (MICs). Using thermogravimetric−differential scanning calorimetry, a laser ignition setup, and a high-pressure propellant combustion system , we examine the thermal reactivity, ignition behavior, burning rate, agglomeration, and condensed combustion products of various MICs-inclusion propellants. We find that the use of ternary Al/CuO/PVDF MICs can decrease the onset temperature and increase the oxidation efficiency of Al, as compared with common binary MICs. The ratio of CuO/PVDF is found to have a strong effect on the combustion intensity of the metallic powders , but only a weak effect on their ignition delay . Higher proportion of PVDF is found to have a negative effect on the combustion rate. Specifically, the combustion intensity is found to decrease first and then increase as the PVDF content increases. The exothermic Al/CuO reaction is found to alter the heat transfer of the condensed layer on the propellant surface, while PVDF plays a critical role in the thermal feedback of the gaseous reaction. When combined, these two factors lead to a ± 30% variation in the propellant burning rate. Furthermore, ternary MICs are found to reduce agglomeration during propellant combustion. The two optimal formulations are 2.5 wt.% CuO/2.5 wt.% PVDF and 3.5 wt.% CuO/1.5 wt.% PVDF. The use of these formulations is found to decrease the mean particle size of the condensed combustion products to only 11 μm, as compared with 76 μm for the original Al-inclusion propellant. High-speed microscope images reveal the existence of crack phenomena in the pockets surrounding the AP particles on the burning surface due to the Al/CuO reaction, as well as the floccule breakup mechanism of Al aggregates in the presence of PVDF, both of which reduce agglomeration. Overall, this study shows that replacing Al with ternary Al/CuO/PVDF MICs has significant effects on the agglomeration, combustion and ignition features of aluminized propellants. The findings of this study can be used to aid the development of highly adjustable functional catalysts for solid propellants.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ling Yang,Lei Sheng,Xingxu Gao,Xin Xie,Yaozong Bai,Gaojun Liu,Haoyu Dong,Tao Wang,Xianli Huang,Jianping He
Lithium metal batteries (LMBs) with ultra-high theoretical energy density are a prospective candidate to replace current lithium-ion batteries (LIBs). However, there are still two non-negligible problems of lithium dendrites and the volume expansion effect of LMBs. In this study, reduced graphene oxide (rGO)/Li-Al-LDH composite nanosheets were firstly prepared via a hydrothermal method and then vacuum filtered onto commercial polypropylene (PP) separator. This kind of rGO/Li-Al-LDH nanosheets layer is expected to improve the wettability of liquid electrolytes and thermal stability. Furthermore, rich- Li-Al LDH can promote more ionic carriers and channels, which exhibits higher-efficiency lithium-ion transport properties. Meanwhile, rGO with a graphitic-like structure is able to disperse the concentration of electrons at the sharp point when lithium dendrites arise. As a result, the discharge capacity of the Li||LiFePO 4 cells based on the rGO/Li-Al-LDH@PP separator is still 1.852 mAh after 250 cycles and the capacity decay rate is just 4.24%. It is demonstrated that a feasible and effective strategy for the modified separator can enhance the electrochemical performance of LMBs.
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高影响因子
Reaction Chemistry & Engineering
·
2022
·Vol. 7
·期 11
·2313-2321
·
IF 5.2
Hong-Qing Fu,Haifang Mao,Chaoyang Wang,Kun Yin,Miaomiao Jin,Zhenbiao Dong,Yun Zhao,Jibo Liu
Aimed at greenhouse gas CO2 high value-added utilization, a N,N′-(propane-1,3-diyl)dipicolinamide (PPPA) supported Al(III) metal–organic polydentate chelate complex (Al-PPPA) was designed and used to efficiently catalyze CO2 to cyclic carbonates. The substrate conversion and product selectivity were more than 95% and 98%, respectively, at 120 °C and 2 MPa CO2 without the presence of a co-catalyst. After 5 times of recycling, the substrate conversion was no less than 88%, which indicated the excellent thermal stability and reusability of the catalyst. Simultaneously, the catalyst showed a widely universal range of substrates including olefin chains, phenyl chains, internal epoxides and fluorine-containing epoxides. Furthermore, the plausible mechanism of the CO2 cycloaddition reaction was explored by employing in situ IR technology. The ring opening of PO, CO2 activation and the formation of the final products were examined visually. This work supplies a new route for the theoretical and experimental exploration of new catalyst design and process understanding for efficient greenhouse gas reuse.
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高影响因子
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