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Insights into the deformation mechanisms of an Al1Mg0.4Si alloy at cryogenic temperature:An integration of experiments and crystal plasticity modeling

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Journal of Materials science & technology 2024年第33期200卷 69-82页

作者： Youhong Peng Danyang Li He Wu Kesong Miao Chenglu Liu Li Wang Wei Liu Chao Xu Lin Geng Peidong Wu Guohua Fan School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China Key Laboratory for Light-Weight Materials Nanjing Tech UniversityNanjing 211816China

In this work,we investigated the mechanical properties and corresponding deformation mechanisms of an Al1Mg0.4Si alloy,which exhibited significantly higher strength and outstanding strain hardening capacity at 77 K compared to its counterparts at 298 *** deformation mechanisms responsible for the excellent strength-ductility synergy and extraordinary strain hardening capacity at cryogenic temperature were elucidated through a combined experimental and simulation *** results reveal the presence of numerous slip traces and microbands throughout grain surfaces during deformation at 298 K,whereas at 77 K,vague grain surfaces dominate,indicating the simultaneous operation of multiple slip *** electron microscopy(TEM)analysis using the two-beam diffraction technique demonstrates the presence of dislocations with several different Burgers vectors inside a grain at cryogenic temperature,confirming the activation of multiple slip *** accumulation of dislocations facilitated by these multiple slip systems,combined with the high dislocation density,contributes to strain hardening and remarkable uniform elongation at 77 K.A modified dislocation density-based crystal plasticity model,incorporating the effect of grain boundary hardening(GBH)and temperature,was developed to gain a better understanding of the underlying mechanisms governing alloy’s strength and *** GBH effect significantly enhances statistically stored dislocation(SSD)density and screw dislocation proportion,which promote homogeneous deformation and enhance strain hardening capacity at cryogenic *** findings deepen the understanding of plastic deformation at cryogenic temperatures and pave the way for the development of ultrahigh-performance metallic materials for cryogenic applications.

关键词： Aluminum alloy Cryogenic temperature Grain boundary hardening effect Deformation mechanism Crystal plasticity modeling

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Cobalt-loaded carbon nanotubes boosted aerobic ciprofloxacin transformation driven by sulfide:A comprehensive mechanism investigation

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Chinese Chemical Letters 2024年第3期35卷 127-134页

作者： Han-Qing Zhao Peili Lu Fei Chen Chen-Xuan Li Rui Yan Yang Mu State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment College of Environment and EcologyChongqing UniversityChongqing 400045China College of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

Sulfide oxidation under aerobic conditions can produce active oxygen for the transformation of organic pollutants in aquatic ***,the catalytic performance of transition metal-supported carbon material on this process is poor *** study found that Co-loaded carbon nanotubes(CNTs)was able to realize the efficient aerobic transformation of antibiotic ciprofloxacin(CIP)by sulfide,with the pseudo-first order reaction rate constant improved from 0.013 h^(-1)without catalyst to 0.44–0.71 h^(-1)with 100 mg/L Co-loaded *** oxygen(^(1)O_(2))was the main active specie playing key roles in the process of CIP aerobic transformation with presence of Co-loaded *** studies indicated that the excellent electron transfer ability of Co-loaded CNTs might play an important role to promote the electron transfer and facilitate the formation of intermediate H_(2)O_(2)and^(1)O_(2).Additionally,the Co-loaded CNTs/sulfide system effectively reduced the acute toxicity of organic pollutant,and Co-loaded CNTs showed remarkable cycling stability and negligible *** study gives a better understanding for the Co-loaded CNTs mediated aerobic antibiotics transformation by sulfide,and provide a reference for the application of Co-loaded carbon materials on organics aerobic transformation by sulfide.

关键词： Ciprofloxacin Aerobic transformation Co-loaded carbon nanotubes Sulfide Singlet oxygen

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Crystalline-magnetism action in biomimetic mineralization of calcium carbonate

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Chinese Journal of Chemical engineering 2023年第7期59卷 146-152页

作者： Chaoqun Wu Xun Liu Fujun Yao Xin Yang Yan Wang Wenyuan Hu State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621000China Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621000China National Health Commission Key Laboratory of Nuclear Technology Medical Transformation Mianyang Central HospitalMianyang 621010China

The influence of minor environmental factors,such as the geomagnetic field,on the biomineralization of nacres,is often ignored but a great deal of research has confirmed its important role in the normal mineralization of calcium *** the geomagnetic field is weak,its cumulative effects need to be considered given that the biomineralization process can take ***,the authors of this paper have investigated the effects of weak magnetic fields(25 Gs or 50 Gs)on calcium carbonate mineralization and analyzed the mechanism *** results show that even a weak magnetic field conduces to the formation of vaterite or aragonite,in the induction order of precursor→vaterite→*** stronger the magnetic field and the longer the time,the more obvious the induction *** effect of a magnetic field is strongest in the aging stage and weakest in the solution *** by egg-white protein and by a magnetic field inhibit each other,but they both restrict particle *** findings highlight the importance of minor environmental factors for biomineralization and can serve as a reference for biomimetic preparation of a CaCO_(3)nacre-like structure and for anti-scale technology for circulating cooling water.

关键词： Biomimetic mineralization Calcium carbonate Magnetic field Egg-white protein

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Giant negative electrocaloric effect measured by indirect method in X-ray irradiated P(VDF-TrFE)films

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Journal of Materiomics 2024年第3期10卷 624-631页

作者： Bo Li Bin Yang Hong Zhang Jiajia Zhang Qianjin Wang Weishu Liu Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhenGuangdong 518055China Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and TechnologyShenzhenChina College of Physics and Electronic Information Yunnan Normal UniversityYunnan Kunming 650500China The Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research InstituteGuangzhou 510610China

Flexible solid-state cooling devices with high efficiency are attracted to ferroelectric polymers with excellent negative electrocaloric(EC)*** is challenging to obtain a large negative EC effect in ferroelectric polymers due to the lack of tunable techniques.A giant negative EC response was obtained in the poly(vinylidene fluoride-trifluoroethylene)copolymers(P(VDF-TrFE),70/30,in mole ratio)irra-diated with high-energy *** irradiated P(VDF-TrFE)films showed an adiabatic temperature change of-13.5 K at 40 MV/m under a dose of 5 Mrad(1 Mrad=10^(4) J/kg)obtained by the indirect *** significant negative EC effect is attributed to the enhancement of crystalline due to the entry of polymer molecules into the amorphous to crystalline structure and the reduction of heat ca-pacity due to the increase of *** addition,X-ray irradiation improves the dielectric coefficient from 15 to *** research indicates that irradiation can modify the negative EC properties of ferro-electric polymers for solid-state cooling.

关键词： Negative electrocaloric effects X-rays radiation P(VDF-TrFE)films

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High strength-ductility synergy in refractory multi-principal element alloys via special deformation mechanisms and dislocation behaviors

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Rare Metals 2025年第1期44卷 608-622页

作者： Zhi-Wen Li Bao-Xian Su Liang Wang Chen Liu Zhe Li Qing-Da Zhang Bin-Bin Wang Xiang Xue Rui-Run Chen Yan-Qing Su National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450000China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China

Ti-Zr-Nb refractory multi-principal element alloys(RMPEAs)have attracted increased attention due to their excellent mechanical *** this study,(TiZr)_(80-x)Nb_(20)Mo_(x)(x=0,5 and 10)alloys were designed,and the intrinsic conflicts between strength and ductility were overcome via composition optimization and *** causes of the superior strength-ductility synergy were investigated in terms of their deformation mechanism and dislocation *** results show that the strength improvement can be attributed to the deformation mechanism transition caused by local chemical fluctuations and lattice ***,the slip band widths decrease after Mo addition,and the measured slip traces in the fracture samples are associated with high-order{112}and{123}slip ***,the grain refinement achieved via recrystallization promotes multi-slip system activation and shortens the slip-band spacing,which reduces the stress concentration and inhibits crack source formation,thereby allowing the alloy to ensure sufficient ***,the Ti_(35)Zr_(35)Nb_(20)Mo_(10)alloy annealed at 900℃ exhibits high yield strength and *** findings provide a new strategy for designing high-strength RMPEAs and addressing room-temperature brittleness.

关键词： Refractory multi-principal element alloy Mechanical property Strengthening mechanism Deformation substructure Dislocation behavior

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Microbial-driven ectopic uranium extraction with net electrical energy production

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Frontiers of environmental science & engineering 2024年第1期18卷 49-58页

作者： Xin Tang Yin Ye Chunlin Wang Bingqian Wang Zemin Qin Cui Li Yanlong Chen Yuheng Wang Zhiling Li Miao Lv Aijie Wang Fan Chen School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China School of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China

The extraction of uranium (U) from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources. Microbial reduction of soluble hexavalent uranium (U(VI)) to insoluble tetravalent uranium (U(IV)) holds immense potential for this purpose, but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U. To address these challenges, we present a novel spontaneous microbial electrochemical (SMEC) method that spatially decoupled the microbial oxidation reaction and the U(VI) reduction reaction. Our results demonstrated stable and efficient U extraction with net electrical energy production, which was achieved with both synthetic and real wastewater. U(VI) removal occurred via diffusion-controlled U(VI)-to-U(IV) reduction-precipitation at the cathode, and the UIVO_(2) deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(VI) reduction. Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer, energy metabolism, the TCA cycle, and acetate metabolism, which indicated the ectopic reduction of U(VI) at the cathode. Our study represents a significant advancement in the cost-effective recovery of U from U(VI)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

关键词： U(VI)bioreduction Electricity production Reaction decoupling Uranium-bearing wastewater Biofilm microbiome

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Recycling of waste aluminum scraps to fabricate sulfidated zero-valent iron-aluminum particles for enhanced chromate removal

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Journal of environmental sciences 2024年第4期36卷 650-659页

作者： Yahui Zhang Liguo Zhang Jiajia Zeng Shuqun Xu Jianyu Pan Wenzhuo Huang Jianliang Sun Feng Jiang Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of Environment School of EnvironmentSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology School of Environmental Science&EngineeringSun Yat-Sen UniversityGuangzhou 510275China

Massive waste aluminum scraps produced from the spent aluminum products have high electron capacity and can be recycled as an attractive alternative to materials based on zerovalent iron(Fe^(0))for the removal of oxidative contaminants from *** study thus proposed an approach to fabricate micron-sized sulfidated zero-valent iron-aluminum particles(S-Al^(0)@Fe^(0))with high reactivity,electron selectivity and capacity using recycled waste aluminum scraps.S-Al^(0)@Fe^(0)with a three-layer structure contained zero-valent aluminum(Al^(0))core,Fe^(0) middle layer and iron sulfide(FeS)*** rates of chromate(Cr(Ⅵ))removal by S-Al^(0)@Fe^(0)at pH 5.0-9.0 were 1.6-5.9 times greater than that by sulfidated zero-valent iron(S-Fe^(0)).The Cr(Ⅵ)removal capacity of S-Al^(0)@Fe^(0)was 8.2-,11.3-and 46.9-fold greater than those of S-Fe0,zero-valent iron-aluminum(Al^(0)-Fe^(0))and Fe^(0),*** chemical cost of S-Al^(0)@Fe^(0) for the equivalent Cr(Ⅵ)removal was 78.5%lower than that of S-Fe^(0).Negligible release of soluble aluminum during the Cr(Ⅵ)removal was *** significant enhancement in the reactivity and capacity of S-Al^(0)@Fe^(0)was partially ascribed to the higher reactivity and electron density of the Al0core than Fe^(0).More importantly,S-Al^(0)@Fe^(0) served as an electric cell to harness the persistent and selective electron transfer from the Al^(0)-Fe^(0) core to Cr(Ⅵ)at the surface via coupling Fe^(0)-Fe^(2+)-Fe^(3+)redox cycles,resulting in a higher electron utilization ***,S-Al^(0)@Fe^(0) fabricated using recycled waste aluminum scraps can be a cost-effective and environmentally-friendly alternative to S-Fe^(0) for the enhanced removal of oxidative contaminants in industrial wastewater.

关键词： Recycled waste aluminum scraps Oxidative contaminants Cr(Ⅵ)reduction Sulfidated Al^(0)@Fe^(0)particle Electron transfer

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A diselenide MOF-based nanomotor dual-driven by carbon monoxide and near-infrared-Ⅱ light for multimodal tumor-targeted therapy

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science China Chemistry 2025年第5期68卷 1952-1969页

作者： Ruizhen Tian Zherui Zhang Liping Song Yijia Li Zhengwei Xu Wang Liu Tianlong Zhang Jiayun Xu Youju Huang Tingting Wang Xiaotong Fan Junqiu Liu China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal University Institute of Sustainability for Chemicals Energy and Environment (ISCE2)Agency for ScienceTechnology and Research (A*STAR)

The dense extracellular matrix and high interstitial pressure within tumors hinder nanoparticle penetration,reducing therapeutic *** address this,we engineered a dual-driven nanomotor based on a diselenide metal–organic framework（MOF） using a layer-by-layer assembly process for multimodal synergistic tumor ***-containing imidazole derivatives coordinated with Zn2+form the MOF,sequentially encapsulating near-infrared-Ⅱ（NIR-Ⅱ） photothermal-responsive gold nanorods（AuRods）,Mn2CO10（MnCO）,and glucose oxidase（GOD）.The nanoparticle surface was functionalized with 4T1 cancer cell membranes（DSACGM NPs）,guiding it to drive toward the tumor *** photothermal effect of AuRods and CO release drives nanomotor propulsion,enhancing tumor tissue *** catalyzes glucose（Glu） oxidation,inducing tumor starvation,while the resulting H2O2triggers CO release,suppressing heat shock protein（HSP） expression and enhancing mild photothermal therapy（PTT）.The release of CO and the Mn2+-triggered Fenton-like reaction from MnCO increased intracellular ROS levels,while diselenide depletion of glutathione（GSH） amplified chemodynamic therapy（CDT）.In vitro and in vivo experiments show that DSACGM NPs induce cancer cell apoptosis under NIR-Ⅱ irradiation and efficiently ablate tumors in mice at sub-hyperthermic temperatures（<45°C） with excellent *** study provides valuable insights into nanomedicine design and its potential in advanced tumor therapies.

关键词： dual-driven nanomotors diselenide metal–organic frameworks CO release NIR-II light-responsive mild photothermal therapy chemodynamic therapy starvation therapy

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Preparation,with graphene,of novel biomimetic selfhealing microcapsules with high thermal stability and conductivity

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Frontiers of Structural and Civil engineering 2023年第8期17卷 1188-1198页

作者： Ying-Yuan WANG Yi-Qiu TAN School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

This paper reports a comparative study of microcapsules with enhanced thermal stability and electrical conductivity inspired by the bionic thermal insulation of birds’feathers for self-healing aged *** work is based on an in situ polymerization with composite shell components of graphene and hexamethoxymethylmelamine *** using graphene,microcapsules with rough surfaces are achieved,improving the interface between microcapsules and *** addition,the microcapsules’initial thermal decomposition temperature is appropriately high,so that the stability of the microcapsule in the asphalt highway system is *** proportion of graphene in the microcapsule shell can regulate the microcapsule’s heat resistance because graphene modifies the shell’s structural ***,the microcapsules’electrical conductivity is relatively *** self-healing capability of bitumen sharply increases,providing benefit to the effect of microcapsules on the properties of aged asphalt.

关键词： graphene microcapsule bitumen heat insulation conductivity

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A review of anode materials for sodium ion batteries

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新型炭材料（中英文） 2024年第5期39卷 743-769页

作者： Syed Ali Riza XU Ri-gan LIU Qi Muhammad Hassan YANG Qiang MU Dao-bin LI Li WU Feng CHEN Ren-jie Beijing Key Laboratory of Environment Science and Engineering School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Lithium-ion batteries(LIBs)are used in electric vehicles and portable smart devices,but lithium resources are dwindling and there is an increasing demand which has to be catered *** ion batteries(SIBs),which are less costly,are a promising replacement for LIBs because of the abundant natural reserves of *** anode of a SIB is a necessary component of the battery but is less understood than the *** review outlines the development of various types of anodes,including carbonbased,metallic and organic,which operate using different reaction mechanisms such as intercalation,alloying and conversion,and considers their challenges and *** for modifying their structures by doping and coating,and also modifying the solid electrolyte interface are *** addition,this review also discusses the challenges encountered by the anode of SIBs and the solutions.

关键词： Sodium ion batteries Anode Carbon material Metallic compound Organic

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