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Chemical Compounds from GC/MS Analysis, Functional Investigations, and Corrosion Inhibition Efficacy of a Bio-based and Sustainable Extract against HCl Solution-Activated Corrosion

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Journal of Bio- and Tribo-Corrosion 2025年第2期11卷 1-20页

作者： Ofuyekpone, Okiemute Dickson Okuma, Silas Oseme Iweriolor, Sunday Utu, Ochuko Goodluck Department of Materials and Metallurgical Engineering Faculty of Engineering Delta State University of Science and Technology Ozoro Nigeria Department of Mechanical Engineering Faculty of Engineering Nigeria Maritime University Okerenkoko Nigeria Department of Mechanical Engineering Faculty of Engineering University of Delta Agbor Nigeria Department of Welding and Fabrication Engineering Delta State Polytechnic Ogwashi-Uku Nigeria

Chemicalcompounds from Gas Chromatography/Mass Spectroscopy and functional experimentations of pulverized egg shell extract (PESE) with acetone as solvent showed the presence of polar and non-polar compounds. Among the found organic compounds, some were found to be green and raw materials for medical companies and the polymer industry. Corrosion inhibition investigation was carried out using gravimetric, thermometric, and potentiodynamic polarization approaches, and morphological characterization. Results obtained demonstrated that the extract significantly reduced the half-life of steel, indicating that the oxidation of mild steel in HCl solutions was mitigated due to the adsorption of active chemical components from the extract onto the adsorbent surface. This suggests that the active ingredients in the extract were instrumental in safeguarding and prolonging the lifespan of the steel samples against corrosion-triggering chloride anion. Findings from gravimetric, thermometric, and potentiodynamic polarization approaches are in alignment and indicate that the extract's effectiveness is dependent on concentration and time. The extract efficiency was noticed to increase with concentration until the solution reached saturation point, and decreased with prolonged immersion time. The observed FTIR peaks and morphological display also corroborate the reported inhibitory prowess of the extract. Potentiodynamic polarization parameters revealed that the extract acted with a mixed mechanism. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Gas chromatography

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Progress and prospects for all-perovskite tandem solar cells

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Journal of Energy Chemistry 2025年第4期103卷 90-96页

作者： Qingyang Wu Jingwei Zhu Dewei Zhao Department of Mechanical and Electrical Engineering Liaoning Provincial College of CommunicationsShenyang 110122LiaoningChina College of Materials Science and Engineering and Engineering Research Center of Alternative Energy Materials and Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina

All-perovskite tandem solar cells(TSCs)consist of a wide-bandgap(WBG,1.75-1.8 eV)top subcell and a low-bandgap(LBG,1.2-1.3 eV)bottom subcell,exhibit superior power conversion efficiencies(PCEs)compared to single-junction perovskite solar cells(PSCs).In addition,the advantages of lowtemperature solution preparation and low manufactu ring cost make the all-perovskite tandem solar cells widely concerned,and are considered to be one of the most potential next-generation high-performance thin film photovoltaic *** this perspective,we briefly summarize the state-of-the-art advances in monolithic all-perovskite TSCs focusing on the following aspects:LBG perovskite bottom subcells,WBG perovskite top subcells,and interconnecting layers(ICLs).We then discuss the primary strategies to improve their performa nce and finally highlight the perspective regarding the achievement of efficient and stable all-perovskite tandems.

关键词： Wide-bandgap perovskite top subcell Low-bandgap perovskite bottom subcell Interconnecting layer All-perovskite tandem solar cell Progress Prospect

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Thermal and mechanical enhancements in polyimide/basalt fiber composites through mineral-based nano-dust particles

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Iranian Polymer Journal (English Edition) 2025年 1-12页

作者： Kumar, Arputham Arul Jeya Kumar, Ramasamy Senthil Madan, Madhur Gangishetti, Ankit Prakash, Muniyandi Department of Mechanical Engineering Center for Composites and Advanced Materials SRM Institute of Science and Technology Kattankulathur Tamil Nadu Chennai603203 India Department of Mechanical Engineering Mohamed Sathak Engineering College Tamil Nadu Keelakarai623806 India

The mineral-based nanoparticles derived from grinding of automobile brake pads are used in this study. The influence of nano-brake-pad dust particles in polyimide (PI) reinforced basalt fiber (BF) composites is experimentally investigated. Four different weight fractions of composites are prepared using hot compression molding. The fabricated PBN composites with dispersed nano-dust fillers find applications in automobile and aerospace engineering. The physical properties of the formulated composites are studied using Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA) are carried out to identify the enhanced thermal behavior of the composites. The FTIR spectrum indicates the stretching of molecular structure for the occurrence of C=O links. SEM shows the strong interfacial bonding between the ingredients and matrix. DSC shows the glass transition temperature reduces with nanoparticles addition. TGA reveals that the composites withstand a temperature of 512.15 °C without degrading and the percentage of weight loss after degradation of the composite enhances to 28.64% more, when compared to the pure sample. DMA shows a significant increase of about 84.32% in storage modulus and subsequent decrease in the value of tan δ by around 42.9% when the weight percentage of nano-dust particles increases, compared with pure composites. The presence of multiple elements in the nano-dust particles may influence the physical and thermo-mechanical properties of the polymer composite when compared with single compound nanocomposites. © Iran Polymer and Petrochemical Institute 2025.

关键词： Compression molding

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Effects of Interface Anisotropy on the Solidification Morphology of Zinc Alloys and Development of Data Assimilation for Their Estimation

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第6期111卷 326-335页

作者： Yamamura, Ayano Yasuda, Hideyuki Takaki, Tomohiro Graduate School of Science and Technology Kyoto Institute of Technology Japan Department of Materials Science and Engineering Kyoto University Japan Faculty of Mechanical Engineering Kyoto Institute of Technology Japan

The solid–liquid interface energy anisotropy of Zn alloys remains poorly understood. Recently, characteristic 14-arm dendritic growth has been observed using time-resolved X-ray computed tomography at SPring-8 during the solidification of a Zn–4mass%Al alloy. This study investigates the dependence of the dendrite morphologies of Zn alloys on solid–liquid interface energy anisotropy through systematic phase-field simulations of the growth of an isolated equiaxed dendrite. We also develop a data assimilation system to estimate the anisotropy parameters of solid–liquid interface energy and crystal orientation in Zn alloys and validate the system through twin experiments. This study provides insights into the solidification of Zn alloys and a powerful tool for their investigation. © 2025 The Iron and Steel Institute of Japan.

关键词： data assimilation dendrite phase-field method solidification solid–liquid interface energy zinc alloy

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Salt-free Solid Oxide Membrane-Based Electrolysis of Metal Oxides

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Journal of Sustainable Metallurgy 2025年 1-9页

作者： Yan, Haoxuan Pal, Uday Department of Mechanical Engineering and Division of Materials Science and Engineering Boston University BostonMA02215 United States

Solid Oxide Membrane (SOM)-based electrolytic processes are developed to address the challenges of transitioning from fossil fuel dependence toward sustainable energy sources for metals production. In this manuscript, a novel, molten salt-free Solid Oxide Membrane (SOM) electrolysis process is demonstrated for the direct reduction of iron oxide to iron. Iron oxide and non-consumable liquid silver are contained in a one-end closed yttria-stabilized zirconia (YSZ) SOM tube. The oxygen is pumped out of the liquid silver with an applied electrical potential across the electrodes and this reduces the iron oxide in the silver. Electrochemical analysis confirms high cell efficiency during initial electrolysis, and 99.5 atomic% pure iron was produced. This proof-of-concept electrolysis process demonstrates an alternate efficient, environmentally friendly route for iron making and a possible method for future researchers to employ salt-free SOM electrolysis for the production of other metal/alloy systems. © The Minerals, Metals & materials Society 2025.

关键词： Iron analysis

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Atomistic simulations of twin facets associated with three-dimensional{1011}twins in magnesium

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Journal of Magnesium and Alloys 2025年第2期13卷 626-639页

作者： Qiyu Zeng Mingyu Gong Houyu Ma Yao Shen Jian-feng Nie Jian Wang Yue Liu State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Center for High-resolution Electron Microscopy(CHEM) School of Physical Science and TechnologyShanghai Tech UniversityShanghai 201210China Department of Materials Science and Engineering Monash UniversityVictoria 3800Australia Department of Mechanical&Materials Engineering University of Nebraska-LincolnLincolnNE 68583USA

Twinning is a deformation mechanism that creates three-dimensional(3D)twin domains through the migration of twin *** occurs via the nucleation and glide of twinning disconnections(TDs),which can pile up to create twin facets.A comprehensive under-standing of twin facets associated with 3D twins,including their atomic structures and energies,is crucial for understanding deformation *** this study,we propose a molecular statics/dynamics(MS/MD)approach to determine characteristic twin facets enclosing 3D non-equilibrium/equilibrium{1011}twin domains,which has been much less studied than the counterpart{1012}twin *** stability of different TD pile-up arrangement with varying line senses informs the morphology of 3D non-equilibrium twins,which are bounded by{1010}_(T)||{1013}_(M),{1011}_(T)||{0002}_(M)and{1013}_(T)||{1013}_(M)coherent facets associated with pile-up of edge TDs,and discrete non-edge TDs aligned along CTBs with their line senses parallel to<4513>,<1101>,<5416><2113>or<1012>*** of semi-coherent facets of equilibrium twins is accompanied by rearrangement of TDs around misfit dislocations.3D equilibrium{1011}twins may comprise{1011}_(T)||{0002}_(M),{1457}_(T)||{3419}_(M),{1657}_(T)||{5617}_(M),{1433}_(T)||{3413}_(M),{0110}_(T)||{0111}_(M)and{0221}_(T)||{0221}_(M)semi-coherent facets in<1210>,<4513>,<1101>,<5416>,<2113>and<1012>axes,respectively.

关键词： Twinning Twin boundary Twinning disconnection Molecular dynamics

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Hierarchically porous 3D Y-branched carbon tube grids for high-performance filter capacitors

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science China(Technological sciences) 2025年第4期68卷 49-58页

作者： Gan CHEN Fangming HAN Guowen MENG Bingqing WEI Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mechanical Engineering University of DelawareNewark DE 19716USA

The rapid development of sustainable green energy,which often generates fluctuating electrical signals,has driven the demand for high-performance filter capacitors in alternating/direct current *** bulky aluminum electrolytic capacitors with electric double-layer capacitors(EDLCs)holds promise for electronics ***,EDLCs face a trade-off between charge storage ability and ion/electron transport ***,we demonstrate three-dimensional Y-branched carbon tube(3D-YCT)grids with a hierarchically porous structure as electrodes for line-filtering *** branching patterns and positions within the 3D-YCT are precisely tailored through the nanochannels inside anodic aluminum oxide *** integrated 3D Y-branched CT arrays provide unobstructed pathways for fast frequency response and extensive surfaces for high *** resulting 3D-YCT-based EDLC achieves a desirable specific areal capacitance(C_(A))of 3.6 mF cm^(-2)with a phase angle of-80°at 120 Hz,outperforming most reported line-filtering EDLCs and demonstrating excellent line-filtering *** findings offer valuable insights for constructing miniaturized filter capacitors.

关键词： hierarchically porous structures three-dimensional Y-branched carbon tube grids fast frequency response electric double-layer capacitors AC line-filtering

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Ultrasound-Enabled Adaptive Protocol for Fast Charging of Lithium-Ion Batteries

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Journal of Electrochemical Energy Conversion and Storage 2025年第3期22卷 031012页

作者： Im, Ganghyeok Lu, Wei Popa, Bogdan Ioan Epureanu, Bogdan I. Department of Mechanical Engineering University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States

This paper introduces an ultrasound-assisted multistage constant current (UA-MSCC) charging protocol to enhance the charging performance of lithium-ion batteries. In this approach, ultrasound is applied during the final portion of each MSCC charging phase. Experimental results demonstrate that ultrasound decreases the internal resistance of pouch cells by up to 7%, leading to significant increase in charging capacity during each MSCC stage. The overall charging time is reduced by 26% compared to the conventional constant current-constant voltage (CCCV) protocol. The performance improvement delivered by this ultrasound-assisted charging approach is especially large when the battery is charged at low temperatures and to a partial capacity. Notably, the application of ultrasound improves the coulombic efficiency to levels comparable to that at the room temperature when charging in cold environments (0 °C). This approach can be applied to commercial batteries to immediately improve their charging performance, and can be seamlessly integrated into battery management systems. Unlike approaches that necessitate electrode material modifications or electrolyte additives, which require a long development time, this UA-MSCC charging protocol offers a practical and easily applicable solution for improving the battery charging performance. © 2024 by ASME.

关键词： State of charge

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Advanced 3D-printed antibacterial nano 58S bioglass/AgNPs/CeO2-based scaffolds for bone tissue engineering

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Ceramics International 2025年第15期51卷 20939-20953页

作者： Singh, Indrajeet Kong, Ing Viswakarma, Ashok Balani, Kantesh Advanced Polymer and Composite Materials Laboratory Department of Engineering School of Computing Engineering and Mathematical Sciences La Trobe University BendigoVIC3550 Australia Department of Materials Science and Engineering Indian Institute of Technology Kanpur208016 India Department of Mechanical Engineering Indian Institute of Technology Kanpur208016 India

58S bioglass (BG) has been considered an effective bioceramic in bone tissue engineering due to its good osteoinductive and osteoconductive properties;however, its poor antibacterial and printing properties remain a challenge in the development of ideal patient-specific, fully interconnected, bone-like scaffolds. To address this issue, this study presents novel 3D-printed BG/AgNPs/CeO2 (BGAC3D) composite scaffolds. These scaffolds exhibit a fully interconnected pore network (≈99 %) with a porosity of ≈64 % and optimally designed pore and strut sizes of 404 ± 15 μm and 394 ± 30 μm, respectively, making them suitable for bone healing applications. Adding AgNPs and ceria nanoparticles significantly increased the shear-thinning properties of Pluronic F-127/BG/AgNPs/CeO2-based ink, as compared to Pluronic F-127/BG-based ink. As a result, BGAC3D scaffold showed improved dimensional accuracy during printing relative to pristine BG. Nanoindentation studies revealed substantial increase in the mechanical properties of BGAC3D scaffolds, with elastic modulus, hardness, and compressive strength showing enhancement of 76 % (57.9 ± 8 GPa), 24 % (3.1 ± 1 GPa), and 275 % (1.5 ± 0.4 MPa), respectively. The antibacterial properties of BGAC3D scaffolds were investigated using disc diffusion and bacterial adhesion assays, which demonstrated an exceptional bactericidal efficacy of 99.3 % against Escherichia coli (E. coli) and 99.4 % against Staphylococcus aureus (S. aureus) compared to pristine BG. The cytocompatibility of the scaffolds was assessed using resazurin assays with mouse BMSCs and MTT assays with mouse fibroblasts, revealing enhanced cell viability for the BGAC3D composition compared to BG. Additionally, both BG and BGAC3D composites showed similar apatite mineralization on their surfaces, as observed under a scanning electron microscope. These findings indicate that BGAC3D scaffolds possess the necessary mechanical, antibacterial, and cytocompatibility properties, making th

关键词： Escherichia coli

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Mechanism modulating the redox chemistry of hexaazatriphenylene-based small molecules by push–pull electron effect for zinc-ion batteries

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Rare Metals 2025年 1-10页

作者： Wang, Zhi-Qiang Liu, Jing-Wei Chen, Jing-Jing Huang, Yong-Cong Hussain, Iftikhar Luo, Wen Yuan, Hui-Min Hu, Jing Wang, Zhen-Yu Yang, Ming-Yang Li, Ying-Zhi Liu, Gui-Yu Gu, Shuai Zhang, Kai-Li Lu, Zhou-Guang Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen518055 China College of Chemistry and Chemical Engineering Central South University Changsha410083 China Department of Mechanical Engineering City University of Hong Kong 999077 Hong Kong

Organic compounds are promising electrode materials for aqueous zinc-ion batteries (AZIBs) but largely suffer from poor rate and cycling performance. This work reports that the push–pull electron effect of organic compounds could be used to tune the electrochemical performance of AZIBs. Hexaazatriphenylene-based (HATN) small molecules with different withdrawing or donating groups were synthesized and used as electrodes for AZIBs. Compared to the hydrogen atoms and electron-donating methyl groups, the electron-withdrawing fluorine atoms endow HATN-based small molecule (HATN-6F) with a much-improved redox platform, rate performance and cycling stability. The fluorinated electrode HATN-6F potently amplifies and stabilizes the kinetics of cation co-(de)insertion reactions, concurrently enhancing the conductivity and electron affinity, resulting in improved rate performance and enhanced cycling stability. The combination of theoretical calculations and experimental characterization confirms that the fluorine-rich peripheral environment effectively modifies the distribution of conjugated electrons in HATN, enhancing its affinity for zinc ions and improving its capacity for cations zinc storage. This work demonstrates a new avenue for the design and synthesis of organic electrode with excellent electrochemical performance for ZIBs. © Youke Publishing Co.,Ltd 2025.

关键词： Redox reactions

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