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Enhancing strength-ductility synergy in high-Mn steel by tuning stacking fault energy via precipitation

Journal of Materials Science & technology 2024年第20期187卷 240-247页

作者： Hao Cheng Lixin Sun Wentao Li Yang Zhang Ye Cui Dan Chen Zhongwu Zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

Deformation-induced twinning or martensitic transformation can improve the work-hardening capabil-ity of alloys with face-centered cubic(FCC)structures and suppress strain *** stacking fault energy(SFE)of alloys plays a key role in determining deformation mechanisms and mechanical *** study developed V-bearing high-Mn steel with a tensile strength of 1288 MPa and uniform elongation of 36%by tactfully designing the *** of V-carbides was selected to strengthen the steel and tune the global SFE of the matrix by settling *** work-hardening capability due to lower SFE and finer twin/matrix lamellae provided the steel with good ductility,while precipitation strengthened it.

关键词： Precipitation Stacking fault energy High manganese steel Work hardening V-carbides

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A nanocomposite film with layer-by-layer self-assembled gold nanospheres driven by cucurbituril for the selective transport of l-tryptophan and lysozyme

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Chinese chemical Letters 2025年第1期36卷 258-261页

作者： Hao Zhang Haonan Qu Ehsan Bahojb Noruzi Haibing Li Feng Liang The State Key Laboratory of Refractories and Metallurgy School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China National Key Laboratory of Green Pesticide College of ChemistryCentral China Normal UniversityWuhan 430079China School of Environmental and Chemical Engineering Jiangsu Ocean UniversityLianyungang 222005China

Selective separation of amino acids and proteins is crucial in various areas of research,including proteomics,protein structure and function studies,protein purification and drug development,and biosensing and biodetection.A nanocomposite film is formed by combining layer-by-layer self-assembled gold nanospheres(Au NPs)driven by cucurbit[7]uril(CB[7])and polymethyl methacrylate(PMMA)*** to the host-guest interactions,the selective transmission of l-tryptophan in the nanocomposite film is confirmed by the current-voltage measurements using a ***,by adjusting the particle size of Au NPs to increase channel size,lysozyme containing multiple tryptophan residues can selectively pass through the nanocomposite film,indicating the high versatility and adaptability of the nanocomposite *** study will provide a new direction for the selective separation of amino acids and proteins.

关键词： Nanocomposite film Cucurbit[7]uril Gold nanospheres Host-guest interactions Selective transmission

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Solid-liquid phase change materials microcapsules: Synthesis strategies,thermal storage and beyond

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Progress in Natural Science:Materials International 2024年第4期34卷 615-631页

作者： Yan Gao Huan Liu Haoguan Gui Chao Yao Guolin Zhang Fuxin Liang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical Engineering Changzhou University Department of Chemical Engineering Tsinghua University Liaoning Provincial Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials Liaoning University

Thermal energy storage is crucial in the context of achieving carbon neutrality. Phase change latent heat stands out among various thermal storage methods due to the high energy density of phase change materials(PCMs).PCMs possess unique characteristics such as tunable thermal storage or/and release processes, constant phasetransition temperatures, and changes in physical state. However, solid-liquid PCMs cannot be directly utilized due to the liquid leakage in their melted state. The encapsulation of PCM microcapsules(PCMMs) is essential for overcoming limitations and optimizing functionalities of the PCMs. Encapsulation strategies play a key role in considering factors like morphology, structure, physicochemical properties, and specific applications. Furthermore, PCMMs can expand their potential applications by incorporating functional nano-materials within their shells or introducing specific components into their cores during the synthesis process. This review examines various encapsulation strategies for PCMMs, including physical, physicochemical, and chemical methods. Various applications of PCMMs are summarized and analyzed with regards to the characteristics of PCMs in thermal storage, temperature control, and state transformation. Furthermore, the reinforcement strategies or/and design considerations of PCMMs are crucial for meeting specific requirements, such as conventional latent heat storage,thermal protection, and thermal-triggered intelligent materials. Finally, it discusses current challenges, proposed solutions, and future research directions in the field of PCMMs, particularly Janus particle modified PCMMs.

关键词： Phase change materials Microcapsule Controllable synthesis Programmable mechanical behavior Controlled payload release

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Mechanisms for the evolution of cell-to-cell variations and their impacts on fast-charging performance within a lithium-ion battery pack

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Journal of Energy Chemistry 2024年第12期99卷 11-22页

作者： Yufang Lu Xiaoru Chen Xuebing Han Dongxu Guo Yu Wang Xuning Feng Minggao Ouyang State Key Laboratory of Intelligent Green Vehicle and Mobility School of Vehicle and MobilityTsinghua UniversityBejing 100084China Research Institute of Tsinghua University in Shenzhen Shenzhen 518057.GuangdongChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology.Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Cell-to-cell variations(CtCV) compromise the electrochemical performance of battery packs, yet the evolutional mechanism and quantitative impacts of CtCV on the pack's fast-charging performance remain unexplored. This knowledge gap is vital for the proliferation of electric vehicles. This study underlies the relationship between CtCV and charging performance by assessing the pack's charge speed, final electric quantity, and temperature consistency. Cell variations and pack status are depicted using 2D parameter diagrams, and an m PnS configured pack model is built upon a decomposed electrode cell *** in three single electric parameters, i.e., capacity(Q), electric quantity(E), and internal resistance(R), and their dual interactions, i.e., E-Q and R-Q, are analyzed carefully. The results indicate that Q variations predominantly affect the final electric quantity of the pack, while R variations impact the charge speed most. With incremental variances in cell parameters, the pack's fast-charging capability first declines linearly and then deteriorates sharply as variations intensify. This research elucidates the correlations between pack charging capabilities and cell variations, providing essential insights for optimizing cell sorting and assembly, battery management design, and charging protocol development for battery packs.

关键词： Lithium-ion battery Battery pack Cell-to-cell variation Fast charging Performance evaluation

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Intensified shape selectivity and alkylation reaction for the two-step conversion of methanol aromatization to p-xylene

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Chinese Journal of chemical engineering 2023年第7期59卷 240-250页

作者： Tingjun Fu Ran Wang Kun Ren Liangliang Zhang Zhong Li State Key Laboratory of Clean and Efficient Coal Utilization College of Chemical Engineering and TechnologyTaiyuan University of TechnologyTaiyuan 030024China

Two-step conversion of methanol to aromatics via light hydrocarbons can significantly improve the conversion stability compared with direct aromatization of methanol,but it remains a challenge to achieve a high p-xylene(PX)***,silica coating was firstly used to passivate external acid sites of ZSM-5 catalyst for the aromatization of light hydrocarbons by the chemical liquid deposition *** the increase of SiO_(2) deposition,the density of the external acid sites of the catalyst was decreased from 0.1 to 0.03 mmol·g^(-1),which inhibited the surface secondary reactions and increased the PX/X from 34.6% to 60.0%.In view of the fact that the aromatization process in the second step was partly inhibited as methanol was consumed in advance in the upper methanol-to-light hydrocarbons catalyst layer,part of methanol was directly introduced into the lower aromatization catalyst layer to promote the alkylation process during the aromatization,which decreased the toluene selectivity from 34.5% to 14.3% but increased the xylene selectivity from 40.0%to 55.3%.It was also found that an appropriate external acid density was needed for aromatization catalyst to strengthen the alkylation process and improve the selectivity of xylene under the conditions of methanol introduction.

关键词： Methanol to aromatics Two-step conversion Para-xylene Zeolite Silica Catalysis

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A fluorine-free and high-robustness photothermal self-healing superhydrophobic coating with long-term anticorrosion and antibacterial performances

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材料科学技术（英文版） 2025年第7期210卷 284-298页

作者： Wenliang Zhang Shuyi Li Dongsong Wei Yafei Shi Ting Lu Zhen Zhang Zaihang Zheng Yan Liu Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022PR China Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering Jilin UniversityChangchun 130025PR China School of Chemical Engineering Changchun University of TechnologyChangchun 130012PR China

Superhydrophobic surface is a promising strategy for antibacterial and corrosion ***,the use of harmful fluorine-containing materials,poor mechano-chemical stability,the addition of fungicides and poor corrosion resistance often limit its practical *** this paper,a high-robustness pho-tothermal self-healing superhydrophobic coating is prepared by simply spraying a mixture of hydropho-bically modified epoxy resin and two kinds of modified nanofillers(carbon nanotubes and SiO2)for long-term anticorrosion and antibacterial ***-scale network and lubrication structures formed by cross-linking of modified carbon nanotubes and repeatable roughness endow coating with high ro-bustness,so that the coating maintains superhydrophobicity even after 100 Taber abrasion cycles,20 m sandpaper abrasion and 100 tape peeling *** synergistic effect of antibacterial adhesion and pho-tothermal bactericidal activity endows coating with excellent antibacterial efficiency,which against Es-cherichia coli(***)and Staphylococcus aureus(***)separately reaches 99.6％and 99.8％.Moreover,the influence of modified epoxy resin,superhydrophobicity,organic coating and coating thicknesses on the anticorrosion of magnesium(Mg)alloy is systematically studied and *** importantly,the prepared coating still exhibits excellent self-cleaning,anticorrosion and antibacterial abilities after 20 m ***,the coating exhibits excellent adhesion(level 4B),chemical stability,UV radiation resistance,high-low temperature alternation resistance,stable heat production capacity and photother-mal self-healing *** these excellent performances can promote its application in a wider range of fields.

关键词： Superhydrophobic High-robustness Photothermal self-healing Antibacterial adhesion and photothermal bactericidal Long-term anticorrosion

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Multifunctional photon conversion materials for enhancing silicon solar cells

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Light(Science & Applications) 2024年第4期13卷 598-601页

作者： Yiyan Zhang Guanying Chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology150001 HarbinChina

A type of multifunctional erbium(Er^(3+))and ytterbium(Yb^(3+))codoped NaY(WO4)2 phosphors,with simultaneous photon upconversion,photon quantum cutting,and luminescence ratiometric temperature sensing abilities,have b... 详细信息

关键词： photon luminescence quantum

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Advanced Aberration-corrected STEM Techniques for Atomic Imaging of Zeolites-confined Single Molecules:From Exsituto Insitu

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chemical Research in Chinese Universities 2025年第2期41卷 196-210页

作者： WANG Guowei XIONG Hao WEI Fei CHEN Xiao Ordos Laboratory Ordos 017000P.R.China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084P.R.China

Zeolites are a class of inorganic microporous crystalline materials with ordered pore channels, unique shape selectivity, adjustable acidity and alkalinity, and high stability and have been widely used in gas adsorption and heterogeneous catalysis. The size of the zeolite pore structure determines its molecular sieving properties. Therefore, flexibly adjusting the zeolite pore structure and the host-guest interactions with guest molecules to control diffusion or reaction pathways is crucial for designing novel zeolites. Observing the real movement behavior of small molecules and changes in the local structure of the zeolite framework at the micro-nano scale is of great significance. Recently, emerging scanning transmission electron microscopy (STEM) imaging techniques, such as integrated differential phase contrast/optimum bright-field STEM (iDPC/OBF-STEM) and 4D-STEM ptychography have shown great potential for atomic resolution characterization of zeolites, since these are greatly advantageous for imaging electron beam-sensitive materials and light elements. This review first introduces the structural characteristics and applications of zeolites. Secondly, we discuss the application of three emerging imaging techniques in atomic imaging of zeolites. Thirdly, we focus on using iDPC-STEM imaging technology to observe the host-guest interactions between zeolites and single molecules (e.g., benzene, p-xylene, and pyridine). Furthermore, we explore the adsorption-desorption behavior of single molecules in zeolites using in situ iDPC-STEM imaging technology. Finally, we discuss the current challenges and future prospects of advanced TEM characterization techniques in the imaging of zeolite-confined single molecule.

关键词： Zeolite Integrated differential phase contrast/optimum bright-field STEM 4D-STEM ptychography Single-molecule imaging In situ TEM

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Fe regulating Ni_(3)S_(2)/ZrCoFe-LDH@NF heterojunction catalysts for overall water splitting

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Chinese Journal of Structural Chemistry 2024年第2期43卷 24-30页

作者： Yuchen Guo Xiangyu Zou Xueling Wei Weiwei Bao Junjun Zhang Jie Han Feihong Jia School of Materials Science and Engineering Shaanxi University of TechnologyHanzhong723001China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan750021China

With the continuous depletion of traditional energy sources,the development of sustainable energy sources has become one of the important tasks today.A two-step synthesis method was employed to construct Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructured electrocatalysts on nickel foam(NF)in situ.X-ray diffractometer,scanning electron mi-croscope,transmission electron microscope,and X-ray electron spectroscopy were employed to characterize the Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructure,and the hydrogen-extraction reaction(HER),oxygen-extraction reaction(OER)and total hydrolysis properties of this electrocatalyst were tested in 1 mol·L^(-1)KOH *** is shown that Ni_(3)S_(2)/ZrCoFe-LDH@NF is a lamellar stacked heterostructure with an overpotential of 330 mV and a Tafel slope of 90.9 mV·dec^(-1)at a current density of 100 mA·cm^(-2)in the OER reaction and 159.2 mV at a current density of 10 mA·cm^(-2)in the HER *** Tafel slope is 96 mV·dec^(-1),and the catalyst exhibits good structural stability in the 100 h total hydrolysis stability *** successful construction of this heterostructured electrocatalyst provides a good idea and research basis for the subsequent heterojunction and its application in electrocatalysis.

关键词： Ni_(3)S_(2)/ZrCoFe-LDH@NF Heterostructure HER OER Overall water splitting

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New strategy for Mg-air battery voltage-efficiency synergy by engineering protective film with cation vacancies on Mg anode surface

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材料科学技术（英文版） 2025年第10期213卷 24-41页

作者： Yuying He Qianyu Wang Jinghuai Zhang Lele Wang Shujuan Liu Zehua Li Zhen Wei Hao Dong Xiaobo Zhang Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing 211167China

Although the Mg-air battery with high theoretical energy density is desirable for the energy supply of marine engineering equipment,its applications remain limited due to the low actual discharge volt-age and inferior Mg anode utilization *** addition to the microstructure of Mg alloy anodes,the properties of discharge product films are of great importance to the discharge ***,the discharge behaviors of Mg-Y-Zn alloys are first studied mainly from the perspective of film *** contrastive analysis,it is found that the sufficient Y3+produced during the discharge process can substitute Mg2+in Mg(OH)2 to introduce effective cation *** Mg-Y-Zn anode with pro-fuse cation vacancies in the product film shows a synergy of potential and efficiency,and this can be attributed to an increase in the migration pathway for Mg2+,reducing the diffusion over-potential caused by the protective product *** study is expected to provide a new strategy from the perspective of cation vacancy design of discharge film for developing high-performance Mg-air batteries.

关键词： Mg alloy Mg-air battery Product film Cation vacancy Discharge performance

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