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Microwave excited hyperthermy and catalysis of heterostructured Au/Cu–BTA for effective bacteria killing by accelerating charge separation

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Rare Metals 2024年第10期43卷 5186-5201页

作者： Wen-Jing Zhang Li-Guo Jin Shui-Lin Wu Chao-Feng Wang Yu-Feng Zheng Zhao-Yang Li Zhen-Duo Cui Hui Jiang Sheng-Li Zhu Xiang-Mei Liu School of Materials Science and Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072China Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Health Science and Biomedical Engineering Hebei University of TechnologyTianjin 300401China

Deep tissue infections caused by pathogenic bacteria seriously threat the lives of *** this study a smart heterostructured Au/Cu-BTA(BTA=1,2,4,5-benzenetetramine)with microwave(MW)response is synthesized via NaBH_(4)reduction of HAuCl_(4)on the ***/Cu-BTA exhibits excellent hyperthermy and dynamics under MW *** MW thermal mechanism of Au/Cu-BTA is attributed to the excellen dielectric loss and polarization of the heterogeneous ***,the surface energy levels of the Cu-BTA interface alleviate the difficulty of electron hopping through multistage ***,MW can excite Cu-BTA to produce free ***,Au nanoparticles rapidly increase electron transfer and inhibit electron-hole ***,the yields of reactive oxygen species can be enhanced for MW dynamic therapy Consequently,under 10 min of MW irradiation,Au/Cu-BTA killed 99.998%±0.001% of Gram-positive Staphylococcus aureus,99.966%±0.014% of methicillin-resistant Staphylococcus aureus,and 96.871%±0.831% of Gram-negative Pseudomonas *** effective MW bacteria-killing strategy designed in this study shows significant potential for application in the MW-responsive treatment of deep tissue infections without antibiotics.

关键词： Microwave therapy Antibacterial Antiinfection

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Alternating current electroluminescent fibers for textile displays

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National science Review 2023年第1期10卷 14-16页

作者： Zhen Wang Xiang Shi Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Laboratory of Advanced Materials Fudan University

With the emerging 5G and Internet of Things,wearables are developing vigorously [1].Wearables are expected to be flexible,lightweight,breathable and comfortable to satisfy daily applications[2].Integrating electronic devices into textiles to form an electronic textile(e-textile) will simultaneously meet the above requirements and the need for daily clothes.E-textiles with functions of communicating,sensing and supplying power have been widely explored.

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Molten salt electrosynthesis of self-supporting FeCoNi medium entropy alloy electrocatalysts for efficient oxygen evolution reactions

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Journal of materials science & Technology 2024年第31期198卷 63-72页

作者： Xueqiang Zhang Zhongya Pang Jinjian Li Feng Tian Xuewen Xia Shun Chen Xing Yu Guangshi Li Chaoyi Chen Qian Xu Xionggang Lu Xingli Zou State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Metallurgical Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang 550025China School of Materials Science Shanghai Dianji UniversityShanghai 201306China

High/medium entropy alloys(HEAs/MEAs)with high electrocatalytic activity have attracted great attention in water electrolysis ***,facile synthesis of self-supporting high/medium entropy alloys electrocatalysts with rich active sites through classical metallurgical methods is still a ***,a self-supporting porous FeCoNi MEA electrocatalyst with nanosheets-shaped surface for oxygen evolution reaction(OER)was prepared by a one-step electrochemical process from the metal oxides in molten CaCl_(2).The formation of the FeCoNi MEA is attributed to the oxides electro-reduction,high-temperature diffusion and solid ***,the morphology and structure of the FeCoNi MEA can be precisely controlled by adjusting the electrolysis time and *** electronic structure regulation and the reduced energy barrier of OER from the“cocktail effect”,the abundant exposed active sites brought by surface ultrathin nanosheets,the good electronic conductivity and electrochemical stability from the self-supporting structure enable the FeCoNi MEA electrode shows high-performance OER electrocatalysis,exhibiting a low overpotential of 233 mV at a current density of 10 mA cm^(-2),a low Tafel slope of 29.8 mV dec^(-1),and an excellent stability for over 500 h without any obvious structural *** work demonstrates a facile one-step electrochemical metallurgical approach for fabricating self-supporting HEAs/MEAs electrocatalysts with nanosized surface for the application in water electrolysis.

关键词： Molten salt electrosynthesis FeCoNi medium entropy alloy Self-supporting electrocatalyst Nanosheets-shaped surface Oxygen evolution reactions

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Microstructure and mechanical performance of AZ31/6061 lap joints welded by laser-TIG hybrid welding with Zn-Al alloy filler metal

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Journal of Magnesium and Alloys 2024年第8期12卷 3325-3338页

作者： Xinze Lv Liming Liu Key Laboratory of Liaoning Advanced Welding and Joining Technology School of Materials Science and EngineeringDalian University of TechnologyDalian116024China

A series of Zn-xAl(x=0-35 wt.%)alloy filler metals were designed to join AZ31 Mg alloy to 6061 Al alloy by laser-TIG hybrid *** effect of Al content on the wettability of filler metals,microstructure evolution and strength of joint was *** results indicated that the strength of joints was improved with the increase of Al content in filler *** Zn-15Al filler was used,the ultimate fracture load reached the maximum of 1475.3 N/cm,which was increased by 28%than that with pure Zn *** reason is that the Al element acts as a"reaction depressant"in filler metal,which contributes to inhibiting the dissolution of Mg base metal and the Mg-Zn *** addition of appropriate quantity of Al element promoted the precipitation of Al-rich solid solution instead of Zn solid *** MgZn_(2) IMCs have lower lattice mismatch with Al solid solution than Zn solid solution,thus the strength of joints is ***,the excessive addition of Al caused the formation of brittle Mg32(Al,Zn)49 ternary compounds,leading to the deterioration of joint performance.

关键词： Laser-TIG hybrid welding Mg-Al dissimilar joint Intermetallic compounds Microstructure Fracture

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Tailoring the microstructural characteristics and enhancing creep properties of as-cast Mg-5Bi-5Sn alloy through Mn addition

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Journal of Magnesium and Alloys 2023年第9期11卷 3350-3361页

作者： Yi-hao Luo Wei-li Cheng Hui Yu Hong-xia Wang Xiao-feng Niu Li-fei Wang Hang Li Zhi-yong You Hua Hou School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300132China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The creep properties, microstructural characteristics and creep mechanisms of as-cast Mg-5Bi-5Sn(BT55) alloy without and with Mn(BTM550) addition were investigated via creep at 423, 448, and 473 K as well as stresses of 30, 50 and 75 MPa. The results indicate that adding Mn can result in the formation of primary and the dynamic precipitated α-Mn phases. In addition, the morphology of the precipitated Mg_(3)Bi_(2) phase and the orientation relationship between Mg_(2)Sn precipitates and α-Mg can be effectively modified. Tailoring the microstructural characteristics is responsible for the improved creep performance of BTM550 alloy. The dominant creep mechanisms in BT55 and BTM550 alloys are dislocation cross-slip and climb, respectively. Furthermore, twinning and pyramidal slip play an assisting part in both alloys during creep process.

关键词： Mg alloy Microstructural characteristics Creep properties Precipitates Dislocation

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The d-p orbital hybridization engineered RhPb bimetallene for efficient ethanol electrooxidation

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science China Chemistry 2025年第5期68卷 1897-1905页

作者： Bo-Qiang Miao Zi-Han Yuan Qing-Ling Hong Xuan Ai Fu-Min Li Pei Chen Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal University MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi'an Jiaotong University

The construction of bimetallic sites with strong interaction can effectively regulate the electronic structure and modulate the adsorption behavior of adsorbate species on bimetallic catalysts, thereby overcoming catalytic bottlenecks. Herein, an RhPb bimetallene(RhPb b-ML) with the strong d-p orbital hybridization is proposed for efficiently catalyzing ethanol oxidation reaction(EOR). Notably, the specific EOR activity of RhPb b-ML is 32 and 6.8 times higher than those of Rh metallene and commercial Pt/C, respectively. Theoretical calculation analysis reveals that the introduction of Pb atoms into the Rh lattice leads to an upward shift of the d-band center of Rh on RhPb(111). The shift in the d-band center is primarily attributed to the different degrees of hybridization between the d sub-orbitals of Rh and the p-orbitals of Pb, which enhance the adsorption of key species and improve EOR activity and selectivity. In-situ infrared tests and high-performance liquid chromatography tests together confirm that RhPb b-ML not only exhibits enhanced ability for the breakage of C–C bonds but also effectively suppresses the generation of absorbed CO. Furthermore, the strategy of enhancing catalyst performance through the strong d-p orbital hybridization has been demonstrated to be scalable to other bimetallic catalysts, providing valuable insights for the design of advanced catalysts.

关键词： RhPb bimetallene d-p orbital hybridization electronic structure ethanol oxidation reaction selectivity

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Durable Acidic Oxygen Evolution Via Self-Construction of Iridium Oxide/Iridium-Tantalum Oxide Bi-Layer Nanostructure with Dynamic Replenishment of Active Sites

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Nano-Micro Letters 2025年第7期17卷 278-292页

作者： Qi Guo Rui Li Yanan Zhang Qiqin Zhang Yi He Zhibin Li Weihong Liu Xiongjun Liu Zhaoping Lu Institute of Clean Energy Yangtze River Delta Research InstituteNorthwestern Polytechnical University Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology Beijing School of Materials Science and Engineering Harbin Institute of Technology Shenzhen

Proton exchange membrane （PEM） water electrolysis presents considerable advantages in green hydrogen ***,oxygen evolution reaction （OER） catalysts in PEM water electrolysis currently encounter several pressing challenges,including high noble metal loading,low mass activity,and inadequate durability,which impede their practical application and *** we report a self-constructed layered catalyst for acidic OER by directly using an Ir–Ta-based metallic glass as the matrix,featuring a nanoporous IrO2surface formed in situ on the amorphous Ir TaOxnanostructure during *** distinctive architecture significantly enhances the accessibility and utilization of Ir,achieving a high mass activity of 1.06 A mgIr-1at a 300 mV overpotential,13.6 and 31.2 times greater than commercial Ir/C and IrO2,*** catalyst also exhibits superb stability under industrial-relevant current densities in acid,indicating its potential for practical *** analyses reveal that the coordinated nature of the surface-active Ir species is effectively modulated through electronic interaction between Ir and Ta,preventing them from rapidly evolving into high valence states and suppressing the lattice oxygen ***,the underlying IrTaOxdynamically replenishes the depletion of surface-active sites through inward crystallization and selective dissolution,thereby ensuring the catalyst’s long-term durability.

关键词： Electronic interaction Nanoporous Proton exchange membrane (PEM) water electrolysis Replenishment Self-construction

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Negative enthalpy alloys and local chemical ordering:a concept and route leading to synergy of strength and ductility

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National science Review 2024年第4期11卷 172-184页

作者： Zibing An Tao Yang Caijuan Shi Shengcheng Mao Lihua Wang Ang Li Wei Li Xianmeng Xue Ming Sun Yifan Bai Yapeng He Fuzeng Ren Zhouguang Lu Ming Yan Yang Ren Chain-Tsuan Liu Ze Zhang Xiaodong Han Beijing Key Lab of Microstructure and Property of Advanced Materials College of Materials Science &Engineering Beijing University of Technology Department of Materials Science and Engineering City University of Hong Kong Key Laboratory of Partial Acceleration Physics& Technology Institute of High Energy PhysicsChinese Academy of Sciences Department of Materials Science &Engineering Southern University of Science and Technology Department of Physics City University of Hong Kong State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University

Solid solutions are ubiquitous in metals and alloys. Local chemical ordering(LCO) is a fundamental sub-nano/nanoscale process that occurs in many solid solutions and can be used as a microstructure to optimize strength and ductility. However, the formation of LCO has not been fully elucidated, let alone how to provide efficient routes for designing LCO to achieve synergistic effects on both superb strength and ductility. Herein, we propose the formation and control of LCO in negative enthalpy alloys. With engineering negative enthalpy in solid solutions, genetic LCO components are formed in negative enthalpy refractory high-entropy alloys(RHEAs). In contrast to conventional ‘trial-and-error' approaches, the control of LCO by using engineering negative enthalpy in RHEAs is instructive and results in superior strength(1160 MPa) and uniform ductility(24.5%) under tension at ambient temperature, which are among the best reported so far. LCO can promote dislocation cross-slip, enhancing the interaction between dislocations and their accumulation at large tensile strains; sustainable strain hardening can thereby be attained to ensure high ductility of the alloy. This work paves the way for new research fields on negative enthalpy solid solutions and alloys for the synergy of strength and ductility as well as new functions.

关键词： negative enthalpy alloys local chemical ordering strength ductility dislocation

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Long-Range Ordered Nanostructures of Assembling Macromolecules via Rational Design of Kinetic Pathways:A Computational Perspective

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Chinese Journal of Polymer science 2023年第9期41卷 1318-1328,I0004页

作者： Liang-Shun Zhang Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Designing the kinetic pathways of assembling macromolecules such as block copolymers and DNA strands is crucial not only for an achievement of thermodynamically equilibrium nanostructures over macroscopic areas,but also for a better understanding of formation process of higher-level superstructures where well-tailored assemblies act as mesoscopic building *** analysis and computer simulations provide excellent opportunities to microscopically reveal the kinetics and mechanism of structural evolution as well as the collective behaviors of building *** this perspective,we summarize our efforts of theoretical and computational modelling to understand the long-range ordering mechanisms and the organization kinetics of assembling macromolecules along designable ***,we present the computational modelling and recent strategies of designable pathways for the achievement of long-range ***,from the computational views,we give the applications of pathway-designed strategies to explore the ordering mechanism and kinetics in the course of structural evolution,covering the block copolymers and their nanocomposites under zone annealing as well as the hierarchical self-assembly of mesoscopic building units(e.g.,patchy micelles and DNA-functionalized nanoparticles).Finally,we outlook future directions in the field of designable pathways for the achievement of long-range ordered *** perspective could promote further efforts towards the wide applications of theoretical and computational modelling in the construction of soft hybrid metamaterials.

关键词： Dynamic self-consistent field theory Structural evolution Block copolymers Hierarchical self-assembly Polymerization

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Study on the interfacial bonding behavior of dissimilar aluminum alloys via additive friction stir deposition

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Progress in Natural science:materials International 2025年第2期35卷 433-439页

作者： Mingtao Zhang Tao Jiang Yu Su Zhonggang Sun Yaxin Xu Wenya Li Shaanxi Key Laboratory of Friction Welding Technologies State Key Laboratory of Solidification Processing Northwestern Polytechnical University College of Materials Science and Engineering and Tech Institute for Advanced Materials Nanjing Tech University

Conventional fusion-based additive manufacturing methods for dissimilar aluminum alloys often face low efficiency and weak interfacial bonding. The rod-feeding-based additive friction stir deposition(R-AFSD) process improves this by achieving metallurgical bonding through recrystallization without melting the material. This work fills a study gap in multilayer deposition of dissimilar aluminum alloys, focusing on bonding mechanisms and optimizing interfacial properties critical for high-performance dissimilar aluminum alloys structures in aerospace applications. This work fabricated a three-layer deposition of 6061-T6, 2024-T6, and 7075-T6 alloys,characterizing material flow and interfacial microstructure using scanning electron microscopy(SEM) and electron backscattered diffraction(EBSD). Zn enrichment at the 7075/2024 interface resulted in an average grain size of 0.8 μm, enhancing interfacial strength. Shear tests showed that the 7075/2024 interface had the highest shear strength of 232 MPa, while the 6061/2024 interface exhibited a maximum shear strength of 155 MPa with greater plasticity. The multilayer structure of dissimilar aluminum alloys demonstrates superior performance by integrating the strengths of each alloy. The strategic placement of 6061 in the bottom layer provides corrosion resistance, while 2024 enhances fatigue resistance, and 7075 withstands high loads. This study offers novel insights into R-AFSD for dissimilar aluminum alloy deposition, with significant implications for aerospace applications.

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