JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Wenhe Yang,Xue Yang,Yuxuan Wang,Rujing Hou,Qihan Gong,Yichang Pan
The metal-organic framework (MOF) membrane has been widely studied in gas separation applications. However, less attention was paid to organic liquids separation, particularly for the separation of straight and branched alkane isomers which is critical to producing high-octane gasoline. Our work is the first example of a dense and defect-free Al-bttotb membrane synthesized on α-Al 2 O 3 support surface through solvothermal in-situ synthesis. The microstructure of the membrane surface was adjusted by controlling the growth rate of the crystal facet through the addition of formic acid during synthesis. The resultant membrane showed great thermal stability, long-term stability, and chemical stability due to the bonding reaction between the ligands and the support surface. The pervaporation test showed that Al-bttotb membrane preferentially permeated straight and mono-branched alkane. The mass fraction of n-hexane (nHEX, straight) and 3-methylpentane (3MP, mono-branched) was accumulated from 66.66% on the feed side to 88.53% on the permeate side after 20 h of the test, while a mass fraction of 2,2-dimethylbutane (22DMB) decreased from 33.33% to 11.47%. This work sheds new light on the separation of organic liquids through MOF polycrystalline membrane.
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Green Energy & Environment
·
2021
·
IF 8.207
Yifei Wang,Wending Pan,Kee Wah Leong,Shijing Luo,Xiaolong Zhao,Dennis Y.C. Leung
Hydrogel electrolyte is especially suitable for solid-state Al-air batteries targeted for various portable applications, which may, however, lead to continuous Al corrosion during battery standby. To tackle this issue, an ethanol gel electrolyte is developed for Al-air battery for the first time in this work, by using KOH as solute and polyethylene oxide as gelling agent. The ethanol gel is found to effectively inhibit Al corrosion compared with the water gel counterpart, leading to stable Al storage. When assembled into an Al-air battery, the ethanol gel electrolyte achieves a much improved discharge lifetime and specific capacity, which are 5.3 and 4.1 times of the water gel electrolyte at 0.1 mA cm −2 , respectively. By studying the gel properties, it is found that a lower ethanol purity can improve the battery power output, but at the price of decreased discharge efficiency. On the contrary, a higher polymer concentration will decrease the power output, but can bring extra benefit to the discharge efficiency. As for the gel thickness, a moderate value of 1 mm is preferred to balance the power output and energy efficiency. Finally, to cater the increasing market of flexible electronics, a flexible Al-air battery is developed by impregnating the ethanol gel into a paper substrate, which can function normally even under serious deformation or damage.
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COMBUSTION AND FLAME
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2020
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IF 4.57
Qianqian He,Jun Wang,Yaofeng Mao,Huamo Yin,Wei Cao,Fude Nie
The incorporation of aluminum (Al) into explosives represents a facility and efficient way to enhance the energy output through the secondary reaction between Al and the detonation products of explosive. The Al/O ratio and microstructure of HMX/Al play critical roles in combustion performance and energy output. Herein, a gradient structured HMX/Al composite has been designed and fabricated via 3D printing technology using well-dispersed HMX/Al-based ink. For HMX/Al lines, the second reaction heat increases from 196.5 J/g to 1644.8 J/g and the burning rate would decrease from 14.6 to 12.0 mm/s with Al content increased from 10 to 30 wt%. For gradient structured HMX/Al, the burning rate could be controlled by varying the component ratio and the burning rate of each component in the gradient structure was higher than that of the normal HMX/Al counterpart. Furthermore, a gradient evolution of pressure output was monitored for gradient structured HMX/Al cylinder ignited by the laser. These results indicate that the gradient structure as an effective approach can tune combustion performance and energy output of HMX/Al.
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MATERIALS & DESIGN
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2016
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IF 3.997
Na Li,Lan Zhang,Miting Xu,Tian Xia,Xinwei Ruan,Shan Song,Huizhong Ma
Al-graphene composites were successfully prepared from the organic solvent solution system of AlCl 3 and LiAlH 4 dissolved in tetrahydrofuran by electro-deposition technique to improve the mechanical properties of aluminum matrix. Both hardness and wear behaviors of coatings were investigated. Scanning electron microscopy (SEM), Energy spectrum analysis (EDS), X-ray diffraction analysis (XRD) and Raman spectrum were performed to characterize the morphology and structure of composites. The results indicated that graphene nanoplatelets (GNPs) distributed in the aluminum matrix were able to improve the hardness and antifriction properties of composites significantly. In comparison with pure aluminum coating , 3.8- fold increases in the hardness and 11-fold decreases in the friction coefficient of Al-graphene composite coatings are attributed to the remarkable mechanical strength and excellent self-lubrication of graphene.
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SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Jingli Shen,Feng Li,Bo Yin,Liang Sun,Chuan Chen,Shanpeng Wen,Yu Chen,Shengping Ruan
In 2 O 3 and 2.5-10 at% Al-doped In 2 O 3 are prepared through a simple solvothermal method, and samples are characterized by a variety of methods to investigate the phase and morphological properties. The gas sensing measurements reveal that Al-doped In 2 O 3 has superior ethyl acetate sensing capability as compared to pure In 2 O 3 , with the maximum response value approaching 56.3–100 ppm ethyl acetate at 184 °C, which is about 2.34 times higher than pure In 2 O 3 . In addition, 5 at% Al-doped In 2 O 3 gas sensor is also found to have lower detection limit and better selectivity to ethyl acetate. Hence, Al-doped In 2 O 3 material can be promising for sensing ethyl acetate gas with high performance. Also, the mechanism involved in improving sensing performance of Al-doped In 2 O 3 is discussed.
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MATERIALS & DESIGN
·
2016
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IF 3.997
Yanjun Yin,Xueming Li,Yuanjie Shu,Xiaogang Guo,Yuhua Zhu,Xinyue Huang,Hebin Bao,Ke Xu
Al/CuO nanoenergetic materials with nanotube and nanorod morphologies were prepared and investigated in this study. The CuO nanotubes and nanorods synthesized by chemical etching are homogenous on a large scale, with an external diameter in the range of 100– 200 nm and typical lengths of 5– 7 μm. Each of these CuO nano-arrays was deposited on nano-Al by electrophoretic deposition . Using the Brunauer-Emmett-Teller method, the Al/CuO nanotube composite is determined to have a larger specific surface area (43.20 m 2 /g) than that of the Al/CuO nanorod composite (16.75 m 2 /g). The energy released from the Al/CuO nanotubes is approximately to 3264 J/g, which is higher than that released from the Al/CuO nanorods (2013 J/g). The combustion flames for the Al/CuO nanotubes are also more rapid and violent. It is speculated that the excellent output of energy and outstanding combustion performance of the Al/CuO nanotubes could be ascribed to their tubular architecture, which has a larger specific surface area enhances the intimate contact and mass transmission between fuel and oxide.
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FUEL
·
2025
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IF 7.5
Kangli Chen,Zhichao Yu,Yuan Li,Wenfeng Wang,Lu Zhang,Shumin Han
Developing low-cost and high-performance catalysts instead of Pt-based noble metal materials for alkaline HER is essential for sustainable clean technologies. However, the high energy barriers of H 2 O dissociation and intermediate *H lead to the low efficiency and the difficultly of the alkaline HER. Herein, the hierarchical Al-CoP/Ni 2 P on Ni foam (Al-CoP/Ni 2 P@NF) was successfully prepared using interface and doping engineering strategies. The heterostructure, Al doping, and hierarchical morphology significantly improve the electronic configuration and the active surface area of the compound. Notably, the Al-doping compound exhibits excellent HER performance in 1.0 M KOH, achieving a current density of 10 and 20 mA cm −2 at 55 and 72 mV overpotential, respectively, with a Tafel slope of 55.6 mV dec −1 . As an overpotential of 72 mV is performed, the current density 20 mA cm −2 keeps unchanged for even 24 h in alkaline water electrolysis. DFT calculations further reveal that Al-induced partial electron redistribution of CoP/Ni 2 P, thereby optimizing Δ G H* and reducing the energy barriers of H 2 O dissociation.
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ACS Applied Nano Materials
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2024
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IF 5.3
Yajie Chen,Wenchao Zhang,Jianyong Xu,Qi Liu,Wei Shi,Wang Tang
The development of nanoenergetic materials with adjustable reaction performance is the key to achieving controllable ignition and propulsion. It has become one of the research hotspots of scientists in the field of energetic materials. Due to its excellent combustion performance and good film-forming properties, the Al/PVDF energetic system with controllable reactivity has a wide application potential for ignition and propulsion. In this work, an Al@PTA/PVDF nanoenergetic film with tunable performance was successfully prepared by in situ coating a polytannic acid (PTA) interface on the surface of Al nanoparticles (nAl) and a composite assembly with polyvinylidene fluoride (PVDF). The differential scanning calorimetry results show that the main exothermic peak of the Al@PTA/PVDF film is 7.0 °C higher than that of the pure Al/PVDF nanoenergetic film when the coating thickness of the PTA interface is adjusted, and the PTA interlayer can also change the reaction mode of nAl and PVDF to a multiband exothermic. In addition, with the thickening of the PTA interface, the activation energy of the Al@PTA/PVDF film increases from 270.2 to 316.1 kJ/mol, and its average burning rate gradually decreases to 152.68 mm/s. These results indicate that the PTA interface can better control the combustion reaction of Al/PVDF, which will promote its application in the field of controllable combustion and controllable propulsion. It is concluded that the degree of contact and the diffusion length of mass transfer between the reaction components can be changed by introducing an intermediate nanolayer between the fuel and the oxidant, which allows the combustion performance of various composite energetic materials to be adjusted.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jianing Zhang,Junjun Zhang,Lei Zhou,Nurmymeti Yasen,Abudulekemu Abudinaibi,Xiaowei Huang,Xiaodong Zhai,Zhihua Li,Jiyong Shi,Remah Sobhy,Ibrahim Khalifa,Xiaobo Zou
Intelligent films are essential for real-time monitoring of food spoilage. However, the application is often limited by challenges such as hydrophilicity and color instability. In this study, two high hydrophobic bilayer indicators based on sodium alginate-polyvinyl alcohol/chitosan-zein with alizarin grafted onto ZIF-8 carrier (AL@ZIF-8) were fabricated using the casting method and electrospinning, respectively. Molecular docking simulations confirmed the successful grafting of AL@ZIF-8 onto the film substrates. The performance of films was compared and the effectiveness in monitoring freshness indicators was evaluated. The cast film had a precisely controlled thickness due to self-assembly performance, resulting in superior mechanical properties (TS = 10.64 MPa, EB = 43.764 %). In comparison, the nanofiber films demonstrated higher UV-blocking ability (ΔE < 4), faster spoilage response, and greater safety (Cell viability >80 %). Importantly, the nanofiber films exhibited higher sensitivity in monitoring beef freshness, with a color change pattern strongly correlating with spoilage (R 2 = 0.8976).
研究领域:
食品科学
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材料科学
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生物医学工程
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PubMed
高影响因子
MATERIALS CHARACTERIZATION
·
2026
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IF 6.2
Ruofan Wang,Yanfu Yan,Xuemeng Zhou,Gangjian Li,Zheng Wu,Shaowu Dai
A novel no-clean flux enabled direct, plating-free soldering of Cu/Al joints using Sn42Bi58 paste. • Organic acid carbon chain length was tailored to regulate flux activity and interfacial reactions. • A synergistic mechanism between organic acids and fluoroborate salts was elucidated. • The medium-chain succinic acid flux achieved optimal joint strength via interfacial solid solution formation. • The study establishes a clear structure-property relationship from molecular design to joint performance. This study addresses the challenge of low-temperature, flux-based direct soldering for copper‑aluminum dissimilar joints, a critical need in advanced thermal management. A series of novel fluxes were synthesized by incorporating dicarboxylic acids with varying carbon chain lengths—malonic, succinic, and adipic acid—into a triethanolamine-fluoroborate matrix, mixed with Sn42Bi58 powder to form corresponding solder pastes (TL-1 to TL-4). Comprehensive characterization, including wettability tests, shear strength measurements, XRD, SEM-EDS, and FIB-TEM analysis, was conducted. Mechanistically, it is revealed that the carbon chain length dictates the critical balance between flux viscosity (steric hindrance) and carboxylate activation capability. The medium-chain succinic acid in TL-3 achieves an optimal “activation-diffusion-reaction” synergy. It acts concertedly with fluoroborates to thoroughly disrupt the stable native oxides (CuO and Al 2 O 3 ) while simultaneously lowering the diffusion energy barrier for Zn 2+ . This specific interfacial modulation entirely suppresses the conventional formation of brittle intermetallic compounds (IMCs) or non-bonded oxide residues. Consequently, TL-3 facilitates the formation of continuous nanoscale Cu 0.95 Zn 0.049 and Al 0.86 Zn 0.14 solid solution layers at the copper and aluminum interfaces, respectively, achieving robust atomic-level metallurgical bonding. Macroscopically, TL-3 exhibits superior performance with a minimum contact angle of 3.2° on Cu, an exceptional shear strength of 125.86 MPa, and an interfacial nanohardness of 0.826 ± 0.068 GPa. The primary scientific contribution of this work lies in elucidating this novel solid-solution-mediated interfacial strengthening mechanism, offering an innovative atomic-scale engineering pathway for the highly reliable, electroplating-free low-temperature soft soldering of Cu/Al heterogeneous structures. Download: Download high-res image (209KB) Download: Download full-size image
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Duoduo Yang,Junhao He,Kaishen Chen,Yiping Cheng,Zhiyu Liu,Chengyun Zhang
Surface-enhanced Raman scattering (SERS) is a powerful, label-free technique for trace-level molecular detection; however, its broad application is limited by the lack of low-cost, scalable, and reproducible substrates. Here, we introduce a facile route to large-area SERS nanoplatform using liquid-assisted femtosecond (fs) laser direct writing (FLDW) in sucrose solution, followed by thermal evaporation of a thin Au nanofilm composed of nanoparticle clusters on aluminum-alloy substrates. By optimizing sucrose concentration and fs laser power, densely packed arrays of nanocones, nanoplates, and nipple-like protrusions are produced, serving as robust scaffolds for plasmonic hotspots. After thermal evaporation, the substrate exhibits super hydrophobicity with water contact angle (WCA) ∼157°, which concentrates analyte droplets and further amplifies Raman signals. Using Rhodamine 6 G (R6G) and malachite green (MG) as probe molecules, the limits of detection (LODs) were determined to be 3.5 × 10 −14 M for R6G and 6.6 × 10 −11 M for MG, with corresponding enhancement factors (EFs) of 1.19 × 10 11 and 6.13 × 10 7 , respectively. Uniformity tests yielded relative standard deviations (RSDs) below 4 %, and cycle reusability assays showed < 15 % signal loss. After 150 days, more than 80 % of the initial SERS signals were retained, confirming long-term stability under ambient conditions. Simulation results reveal intense electromagnetic hotspots localized at nanostructure tips and junctions, accounting for the substrate’s exceptional SERS performance. This straightforward, contamination-free approach enables scalable production of durable, high-performance SERS substrates for environmental monitoring, food safety, and biomedical diagnostics.
研究领域:
分析化学
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纳米科技
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生物医学工程
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环境监测
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食品安全
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分子诊断
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Materials Research Express
·
2019
·Vol. 6
·期 6
·066308
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IF 1.449
Xie Hui,Yu Jiakang,Jiang Dapeng,Liu Jipeng
Graphite flakes (Gf) were coated with Cr7C3 by salt bathing coating, and the Cr7C3 coated Gf reinforced Al matrix composites were prepared by gas pressure infiltration. Surface morphology of uncoated and Cr7C3 coated Gf, the interfacial characteristics of Cr7C3 coated Gf/Al composites were observed by SEM. Surface of Cr7C3 coated Gf is smooth without defects, the Cr7C3 coating effectively improved the wettability. When volume fraction of Gf is below 50%, the experimental value of thermal conductivity (TC) is basically consistent with the calculated value of the EMA model. When volume fraction of Gf is over 50%, the growth of deviates from the EMA model curve. Coefficient of thermal expansion (CTE) of composite was predicted by Kerner model and Orientation Disc model, because Kerner model does not consider the anisotropy of Gf and inaccurately predict the change of CTE. However, the Orientation Disc model can predict the change of CTE better, but there is certainly deviation.
研究领域:
材料科学
·
热物理
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危险品化学品经营许可证（带存储）