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High-entropy design boosts dielectric energy storage

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Rare Metals 2024年第8期43卷 4013-4015页

作者： Qiu-Ying Xia He Zhu si lan Yang Ren Herbert Gleiter Institute of Nanoscience School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Physics City University of Hong KongHong Kong999077China

Dielectric capacitors are vital for advanced electronic and electrical power systems due to their impressive power density and ***,a persistent challenge has been enhancing their energy densities while maintaining high *** in Science,a novel high-entropy design for relaxor ferroelectric materials has been proposed,promising significant improvements in both energy density and efficiency for multilayer dielectric ceramic *** the crucial role of high-entropy design in energy storage materials and devices,this highlight focuses on interpreting the progress and significance of this innovative work.

关键词： ceramic dielectric energy

Effect of the chloride ion on advanced oxidation processes catalyzed by Fe-based metallic glass for wastewater treatment

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Journal of Materials Science & Technology 2022年第22期117卷 49-58页

作者： Shuangqin Chen Mai Li Qingmin Ji Tao Feng si lan KeFu Yao School of Material Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and TechnologyNanjing 210094China School of Material Science and Engineering Tsinghua UniversityBeijing 100084China School of Material Science and Engineering Nanjing Institute of TechnologyNanjing 211167China

Fe-based metallic glasses (Fe–MGs) are potential candidate catalysts for advanced oxidation processes(AOPs) for recalcitrant organic pollutant degradation. However, industrial wastewater and natural contaminated sites usually contain abundant inorganic ions, like the chloride ion (Cl−), which significantly affectAOPs, but their influence on MG-activated AOPs still remains unclear. Through the study of three commonly used oxidants, hydrogen peroxide (H_(2)O_(2)), peroxydisulfate (PDS), and peroxymonosulfate (PMS), theeffect of Cl− on the FesiB-catalyzed process of degradation of the typical azo dye Orange Ⅱ was investigated. Evidence indicates that the addition of Cl− resulted in the monotonous inhibition of the degradation process when the H_(2)O_(2)/FesiB and PDS/FesiB systems were employed, but promoted effect wasdetected with the PMS/FesiB system, which is different from the previously observed dual effect of Cl−.It is closely relative with FesiB induced unique variety of degradation pathways, including radicals, nonradicals (^(1)O_(2)), and direct reduction degradation. Moreover, the presence of Cl− significantly affected thesystems’ absorbable organic halogen content and the amount of Fe leached into the solution. The resultsof this work will provide essential references for Fe-based MG used as AOP catalysts in field applicationsand the development of advanced MGs with excellent adaptability to complex environments.

关键词： Fe-based metallic glass Advanced oxidation processes Wastewater treatment Chlorine ion

Highly efficient cobalt-based amorphous catalyst for peroxymonosulfate activation toward wastewater remediation

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Rare Metals 2023年第4期42卷 1160-1174页

作者： Xue-Chun Zhou Shuang-Qin Chen Ming-Jie Zhou Mai Li si lan Tao Feng School of Materials Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and TechnologyNanjing210094China School of Material Science and Engineering Nanjing Institute of TechnologyNanjing211167China

Metallic glasses(MGs)are rising novae in the catalytic field,due to their unique amorphous structure,large residual stress,and high density of low coordination ***,there is still an absence of suitable MGs'catalysts for advanced oxidation processes(AOPs)with peroxymonosulfate(PMS),the most efficient and promising wastewater remediation ***,the cobalt-based MG(Co-MG)with a nominal composition of Co_(67)Fe_(4)-Mo_(1.5)si_(16.5)B_(11)(at%)was utilized as an activator of PMS for azo dye *** results demonstrated that the CoMG/PMS system had an order of magnitude higher efficiency on OrangeⅡ(OII)degradation than the Fe-MG/PMS *** fundamental study and field application,the effect of adding inorganic anions(Cl^(-),HCO_(3)^(-),H_(2)PO_(4)^(-),SO_(4)^(2-),NO_(3)^(-)),environmental factors,and cycle experiments on the catalytic properties of Co-MG were investigated emphatically to evaluate overall degradation *** has demonstrated that the Co-MG with more stability,better corrosion resistance and durability contrasted to *** addition,the excellent catalytic performance of Co-MG was analyzed based on the quenched experiment,electron paramagnetic resonance(EPR),and X-ray photoelectron spectroscopy(XPS)*** present results provide not only a new candidate but also shed light on exploring a new kind of AOPs system based on Co-MGs for wastewater treatment.

关键词： Co-based metallic glass ribbons Inorganic ions Stability Advanced oxidation process Peroxymonosulfate Azo dyes

Fabrication of Ni–Mo–Nb metallic glass/micro-nano lattice composite for nonenzymatic glucose sensing

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Progress in Natural Science:Materials International 2023年第5期33卷 601-606页

作者： sihan Zhang Wentao Zhang Yu Lou Zixin Rui Zhongzheng Yao Ao Yan lan Tan sinan Liu Jiacheng Ge He Zhu si lan Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology School of Materials Science and Engineering Henan University of Technology Center for Neutron Scattering City University of Hong Kong Shenzhen Research Institute

The rising global diabetic population has ignited significant interest in enzyme-free electrochemical glucose ***,their widespread usage has been severely impeded by the lack of sensing probes with both high sensitivity and *** this work,we present a novel approach for conformally depositing a Ni-Mo-Nb metallic-glass film onto a three-dimensional printed polymer skeleton for glucose *** printing template is designed based on a six-membered tricapped trigonal prism(6M-TTP) structure,which is derived from a medium-range order structure motif observed in amorphous *** fabricated composite combines the high electrochemical activity of Ni-Mo-Nb amorphous alloy with the stability afforded by the micro-nano lattice structure,resulting in a high sensitivity(482 μA mM-1cm-2),a wide linear range(0-1 mM and 1-5 mM),a low detection limit(2.94 μM),and good long-term stability and selectivity in alkaline *** work has proposed a new avenue to fabricate complex micro-nano electrodes,potentially offering significant versatility and great promise for widespread applications in the field of electrochemistry.

关键词： Glucose

Ultrafast joule-heating synthesis of FeCoMnCuAl high-entropy-alloy nanoparticles as efficient OER electrocatalysts

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Progress in Natural Science:Materials International 2024年第5期34卷 880-887页

作者： Xindong Zhu Wen Huang Yu Lou Zhongzheng Yao Huiqiang Ying Min Dong lan Tan Jianrong Zeng Hua Ji He Zhu si lan Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Institute of Applied Physics Chinese Academy of Sciences Scientific Research and Innovation Center Suzhou Nuclear Power Research Institute National Engineering Research Center for Nuclear Power Plant Safety & Reliability

High entropy alloys（HEAs）, known for their synergistic orbital interactions among multiple elements, have been recognized as promising electrocatalysts for enhancing the sluggish kinetics of oxygen evolution reaction（OER）. Despite their potential, the facile and rapid preparation of HEA nanoparticles（NPs） with high electrocatalytic activity remains challenging. Here, we report an ultrafast synthesis of noble-metal-free FeCoMnCuAl HEA NPs loaded on conductive carbon fiber networks using a Joule heating strategy. The prepared HEA NPs exhibited a face-centered cubic（FCC） structure with an average size of approximately 25 *** X-ray absorption fine structure（XAFS） and X-ray photoelectron spectroscopy（XPS） studies were performed to investigate the atomic and electronic structures of the HEA NPs, revealing the co-presence of Fe, Co, Mn, Cu and Al elements as well as their different valences across surface and internal regions. The HEA NPs showed remarkable OER performance, exhibiting an overpotential of 280 mV at 10 mA cm-2and a low Tafel slope of 76.13 mV dec-1in a 1.0 M KOH solution with high electrochemical stability, superior to commercial RuO2electrocatalysts. This work provides a new approach for synthesizing nanoscale noble-metal-free HEA electrocatalysts for clean energy conversion applications on a large-scale basis for practical commercialization.

关键词： X ray photoelectron spectroscopy

Microstructure and magnetic properties evolution of Al/CoCrFeNi nanocrystalline high-entropy alloy composite

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Rare Metals 2022年第6期41卷 2038-2046页

作者： Jun-Jie Wang Zong-De Kou Shu Fu Shang-Shu Wu si-Nan Liu Meng-Yang Yan Di Wang si lan Horst Hahn Tao Feng School of Material Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing Universily of Science and TechnologyNanjing 210094China Institute of Nanotechnology Karlsruhe Institule of TechnologyKarlsruhe 76021Germany

A systematic microstructure-oriented magnetic property investigation for Al/CoCrFeNi nanocrystalline high-entropy alloys composite(nc-HEAC)is *** the initial state,the Al/CoCrFeNi nc-HEAC is composed of face-centered cubic(FCC)-Al,FCC-CoCrFeNi and hexagonal close-packed(HCP)-CoNi *** energy synchrotron radiation X-ray diffraction and high-resolution transmission electron microscopy were used to reveal the relationship between microstructure evolution and mag-netic mechanism of Al/CoCrFeNi nc-HEAC during heat *** low-temperature annealing stage,the mag-netic properties are mainly contributed by the HCP-CoNi *** the increase of temperature,the diffusion-in-duced phase transition process including the transformation of AlCoCrFeNi HEA from FCC to BCC structure and the growth of B2 phase plays a dominant role in the magnetic *** was found that the magnetic properties can be effectively regulated through the control of the thermal diffusion *** nano dual-phase thermal diffusion-induced phase transition behavior of nanocomposites pre-pared based on laser-IGC technology provides guidance for the diffusion process and microstructure evolution of two phases in composites.

关键词： Nanocry salline high-entropy alloy composites Diffusion-induced phase transition Magnetic Laser-inert gas condensation

Fe-based metallic glass as heterogeneous Fenton-like catalyst for azo dyes degradation:effect of inorganic anions

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Rare Metals 2023年第10期42卷 3443-3454页

作者： Ming-Jie Zhou Wen-Tao Zhang Zhun Li Tao Feng si lan Zhen Peng Shuang-Qin Chen Herbert Gleiter Institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Shenzhen YNTECH Co. LtdShenzhen518118China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

Metallic glasses(MGs) are promising heterogeneous catalysts in water remediation,due to their superior efficiency,selectivity,reusability and corrosion ***,few works are focused on the influence of inorganic anions that are abundant in ***,four common inorganic anions were added in a heterogeneous Fenton-like system(Fe-MG/H_(2)O_(2)) to study inorganic anions' influence on MGs' catalytic performance during methylene blue(MB) *** demonstrated that chloride ions and dihydrogen phosphate ions had an adverse effect on the catalytic performance of Fe-MG,whereas Fe-MG/H_(2)O_(2) system sustained high efficiency in the presence of sulfate ions and nitrate ions during the Fenton-like *** studying the structure,surface morphology,and evolution of active species,it was found that inorganic anions had a significant effect on the surface morphology of Fe-MG and the generation of active *** work will provide essential references for MGs as heterogeneous catalysts in practical applications.

关键词： Fe-based metallic glass(Fe–MG) Inorganic anion Wastewater treatment Methylene blue(MB)

ClCRY2 facilitates floral transition in Chrysanthemum lavandulifolium by affecting the transcription of circadian clock-related genes under short-day photoperiods

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Horticulture Research 2018年第1期5卷 138-148页

作者： Li-wen Yang Xiao-hui Wen Jian-xin Fu si-lan Dai Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular Breeding National Engineering Research Center for FloricultureBeijing Laboratory of Urban and Rural Ecological Environment and College of Landscape ArchitectureBeijing Forestry UniversityBeijing100083P.R.China

Plants sense photoperiod signals to confirm the optimal flowering *** studies have shown that Cryptochrome2(CRY2)functions to promote floral transition in the long-day plant(LDP)Arabidopsis;however,the function and molecular mechanism by which CRY2 regulates floral transition in short-day plants(SDPs)is still *** this study,we identified a CRY2 homologous gene,ClCRY2,from Chrysanthemum lavandulifolium,a typical *** morphological changes in the *** shoot apex and ClFTs expression analysis under SD conditions showed that adult *** completed the developmental transition from vegetative growth to reproductive growth after eight ***,ClCRY2 mRNA exhibited an increasing trend from 0 to 8 d of SD ***2 overexpression in wild-type(WT)Arabidopsis and *** resulted in early *** transcript levels of the CONSTANS-like(COL)genes ClCOL1,ClCOL4,and ClCOL5,and FLOWERING LOCUS T(FT)homologous gene ClFT1 were upregulated in ClCRY2 overexpression(ClCRY2-OE)*** under SD *** transcript levels of some circadian clock-related genes,including PSEUDO-REPONSE REGULATOR 5(PRR5),ZEITLUPE(ZTL),FLAVIN-BINDING KELCH REPEAT F-BOX 1(FKF1),and GIGANTEA(GI-1 and GI-2),were upregulated in ClCRY2-OE ***,while the expression levels of other circadian clock-related genes,such as EARLY FLOWERING 3(ELF3),ELF4,LATE ELONGATED HYPOCOTYL(LHY),PRR73,and REVEILLE8(RVE8),were downregulated in ClCRY2-OE *** under SD *** together,the results suggest that ClCRY2 promotes floral transition by fine-tuning the expression of circadian clock-related gene,ClCOLs and ClFT1 in *** under SD conditions.

关键词： folium transition circadian

Effects of heat treatment on microstructures and properties of a heterostructured alloy with dissimilar components fabricated by WAAM

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Rare Metals 2024年第9期43卷 4441-4461页

作者： Ming-Cai Pan Jun-Qiang Xu Yong Peng Ning-Ning Liang si lan Qi Zhou Ke-Hong Wang School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology Nanjing 210094China

Heat treatment significantly influences homogeneous material microstructures and mechanical properties,which can be improved by an optimal heat treatment ***,heat treatment application to heterogeneous materials presents significant challenges due to compositional and microstructural ***,a laminated heterostructured alloy comprising alternating316L stainless steel(SS)and 18Ni300 maraging steel(MS)layers fabricated using wire and arc additive manufacturing was investigated.A solution treatment was applied at900℃for 0.5 ***,the solution-treated and asfabricated(AF)samples were aged at 500℃for 4 h;these samples were denoted SA and AT,*** AT phase compositions and orientations were similar to those of *** SA 316L SS layer resembled that of AF,but the SA 18Ni300 MS layers exhibited a reduced austenite phase fraction and refined grain size,attributable to solid-state *** the AT sample,aging induced the formation of nanoscale acicularωphase and ellipsoidal Ni_(3)Ti,Fe_(2)Mo,and X precipitates in the 18Ni300 MS ***,the SA precipitates contained acicular Fe Ni_(2)and ellipsoidalω,Ni_(3)Ti,and X precipitates,and their fractions were lower than those in AT ***18Ni300 MS layer microhardness in the heat-treated samples increased due to nanoprecipitation,but the 316L SS layer microhardness resembled that of *** AT and SA ultimate tensile strengths increased to(1360±50)and(1473±41)MPa,respectively,attributable to precipitation *** SA 316L SS layer exhibited a high stress-induced martensite fraction,enhancing the ductility of heated samples.

关键词： Laminated heterostructured alloy Heat treatment Wire and arc additive manufacturing Microstructure Mechanical property