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Synthesis,formation mechanism,and intrinsic physical properties of several As/P-containing MAX phases

Journal of materials science & technology 2023年第2期133卷 23-31页

作者： Hongxiang Chen Sheng Li Jun Deng Zhilong Zhang Jianeng Huang Fa Chang Li Huang Shixuan Du Pinqiang Dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China Center for Advanced Energy and Functional Materials Fujian University of TechnologyFuzhou 350118China Songshan Lake Materials Laboratory Dongguan 523808China CAS Key Laboratory of Vacuum Physics Beijing 100049China

321 phases are an atypical series of MAX phases,in which A=As/P,with superior elastic properties,fea-turing in the MA-triangular-prism bilayers in the crystal *** now,besides Nb 3 As 2 C,the pure phases of the other 321 compounds have not been realized,hampering the study of their intrinsic ***,molten-salt sintering(MSS)and solid-state synthesis(SSS)were applied to synthesize As/P-containing 321 phases and 211 *** the phase composition of the end-product via multiple-phase Rietveld refinement,we found that MSS can effectively improve the purity of P-containing MAX phases,with the phase content up to 99%in Nb_(3)P_(2)C and 75.4(5)%in Nb 2 *** contrast,MSS performed poorly on As-containing MAX phases,only 8.9(4)%for Nb 3 As 2 C and 64(2)%for Nb 2 AsC,as opposed to the pure phases obtained by *** experimental analyses combined with first-principles calculations reveal that the dominant formation route of Nb_(3)P_(2)C is through NbP+Nb+C→Nb_(3)P_(2)***,we found that the benefits of MSS on P-containing MAX phases are on the facilitation of three consid-ered chemical reaction routes,especially on Nb 2 PC+NbP→Nb_(3)P_(2)***,the intrinsic physical properties and Fermi surface topology of two 321 phases consisting of electron,hole,and open orbits are revealed theoretically and experimentally,in which the electron carriers are dominant in electrical *** feasible synthesis methods and the formation mechanism are instructive to obtain high-purity As/P-containing MAX phases and explore new MAX ***,the intrinsic physical properties will give great support for future applications on 321 phases.

关键词： MAX phase Molten-salt synthesis Chemical reaction route Metallic ceramics Formation mechanism Quasi-harmonic approximation

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Anti-corrosion performance of Si-surface-alloying NdFeB magnets obtained with magnetron sputtering and thermal diffusion

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Journal of Rare Earths 2023年第8期41卷 1203-1210,I0003页

作者： Jin Tao Bang Liu Pengjie Zhang Guangqing Xu Jun Lv Jun Huang Jian Yan Wei Sun Bingshan Li Dongmei Wang Yucheng Wu School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China BGRIMM Technology Group Co. Ltd.Beijing 102600China National Engineering Research Center for Magnetic Materials Beijing 102600China Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Anhui Provincial International S&T Cooperation Base for Advanced Energy MaterialsHefei University of TechnologyHefei 230009China

Si alloying in the surface layer of NdFeB magnets was realized by thermal diffusion combined with magnetron *** surface composition,phase structure and morphology of NdFeB(S-Si)specimens were characterized by an X-ray diffractometer,an X-ray photoelectron spectrometer and a field emission scanning electron microscope,*** corrosion resistance of bare NdFeB(S-Si)was analyzed by static full immersion corrosion test and electrochemical *** of sputtering and thermal diffusion on the microstructure and corrosion resistance of the surface layer were *** show that surface alloying layer can effectively improve the corrosion resistance of bare NdFeB with the optimized static total immersion corrosion test time in NdFeB(1S-Si)-800 of 36 h,which is much longer than that of the pristine NdFeB(less than 0.5 h).The E_(corr)of NdFeB(1S-Si)-800 positively shifts from-1.05 to-0.92 V,indicating that the corrosion tendency is obviously *** J_(corr)is1.45×10^(-6)A/cm^(2)which is 2 orders of magnitude lower than that of the pristine NdFeB(5.25×10^(-4)A/cm^(2)).The intergranular composite oxides existing in Nd-rich phase contribute to the enhancement of corrosion resistance of Si-surface-alloying NdFeB.

关键词： NdFeB magnets Si surface alloying Magnetron sputtering Thermal diffusion Corrosion resistance Rare earths

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Photoemission evidence of a novel charge order in kagome metal FeGe

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science China(Physics,Mechanics & Astronomy) 2025年第6期68卷 172-178页

作者： Zhisheng Zhao Tongrui Li Peng Li Xueliang Wu Jianghao Yao Ziyuan Chen Yajun Yan Shengtao Cui Zhe Sun Yichen Yang Zhicheng Jiang Zhengtai Liu Alex Louat Timur Kim Cephise Cacho Aifeng Wang Yilin Wang Dawei Shen Juan Jiang * and Donglai Feng Department of Physics School of Emerging TechnologyUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China National Synchrotron Radiation Laboratory School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Low Temperature Physics Laboratory College of Physics and Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Diamond Light Source Ltd. Harwell Science and Innovation CampusDidcot OX110DEUK New Cornerstone Science Laboratory University of Science and Technology of ChinaHefei 230026China

The kagome metal FeGe provides a rich platform for understanding the mechanisms behind competing orders,as it exhibits charge order(CO)emerging deep within the antiferromagnetic *** investigate the intrinsic origin of this behavior,we examine the evolution of the low-energy electronic structure across the phase transition in annealed FeGe samples using angleresolved photoemission *** find no evidence supporting a conventional nesting mechanism,such as Fermi surface nesting or van Hove ***,we observe two notable changes in the band structure:an electron-like band around the K point and another around the A point,both shifting upward in energy when CO *** findings are consistent with our density-functional theory calculations,which suggest that the charge order in FeGe is primarily driven by magnetic energy savings due to a lattice distortion involving *** results provide photoemission evidence supporting this novel mechanism for CO formation in FeGe,in contrast to the conventional nesting-driven mechanisms.

关键词： kagome metal charge order electronic structure angle-resolved photoemission spectroscopy

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Experimental study of solid-liquid origami composite structures with improved impact resistance

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 118-123页

作者： Shuheng Wang Zhanyu Wang Bei Wang Zhi Liu Yunzhu Ni Wuxing Lai Shan Jiang Yong An Huang AML Department of Engineering MechanicsLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China Institute of Advanced Structure Technology Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and StructuresBeijing Institute of TechnologyBeijing 100081China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China Nanjing Research Institude of Electronics Technology Nanjing 210039China The Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

In this paper,a liquid-solid origami composite design is proposed for the improvement of impact *** this design strategy,Kresling origami composite structures with different fillings were designed and fabricated,namely air,water,and shear thickening fluid(STF).Quasi-static compression and drop-weight impact experiments were carried out to compare and reveal the static and dynamic mechanical behavior of these *** results from drop-weight impact experiments demonstrated that the solid-liquid Kresling origami composite structures exhibited superior yield strength and reduced peak force when compared to their empty ***,the Kresling origami structures filled with STF exhibited significantly heightened yield strength and reduced peak *** example,at an impact velocity of 3 m/s,the yield strength of single-layer STF-filled Kresling origami structures increased by 772.7%and the peak force decreased by 68.6%.This liquid-solid origami composite design holds the potential to advance the application of origami structures in critical areas such as aerospace,intelligent protection and other important *** demonstrated improvements in impact resistance underscore the practical viability of this approach in enhancing structural performance for a range of applications.

关键词： Solid-liquid design Origami structure Impact resistance Shear thickening fluid

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Artificial intelligence for the understanding of electrolyte chemistry and electrode interface in lithium battery

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National science Open 2024年第2期3卷 74-97页

作者： Yawei Chen Yue Liu Zixu He Liang Xu Peiping Yu Qintao Sun Wanxia Li Yulin Jie Ruiguo Cao Tao Cheng Shuhong Jiao Hefei National Laboratory for Physical Science at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China

Recognizing the critical role of electrolyte chemistry and electrode interfaces in the performance and safety of lithium batteries,along with the urgent need for more sophisticated methods of analysis,this comprehensive review underscores the promise of machine learning(ML)models in this research *** explores the application of these innovative methods to studying battery interfaces,particularly focusing on lithium metal *** the limitations of traditional experimental techniques,the review supports a hybrid approach that couples experimental and simulation methods,enabling granular insights into the formation process and characteristics of battery interfaces at the molecular level and harnessing AI to extract patterns from voluminous data *** showcases the utility of such techniques in electrolyte design and battery life prediction and introduces a novel perspective on battery interface *** review concludes by asserting the potential of artificial intelligence(AI)or ML models as invaluable tools in the future of battery research and highlights the importance of fostering confidence in these technologies within the scientific community.

关键词： lithium batteries battery interfaces artificial intelligence machine learning electrolyte chemistry

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Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries

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Energy & Environmental materials 2023年第4期6卷 265-272页

作者： Gan Qu Kai Guo Weijie Chen Yu Du Ye Wang Bingbing Tian Jianan Zhang Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

Rechargeable aqueous zinc-ion batteries are promising candidate for gridscale energy ***,the development of zinc-ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior ***,hexagonal Cs_(0.3)V_(2)O_(5)cathode is fabricated and investigated in zinc-ion *** with the traditional vanadium oxides,the introduction of Cs changes the periodic atomic arrangements,which not only stabilizes the open framework structure but also facilitates the Zn^(2+)diffusion with a lower migration energy ***,high specific capacity of 543.8 mA h g^(-1)at 0.1 A g^(-1)is achieved,which surpasses most of reported cathode materials in zinc-ion *** excellent cycle life is achieved over 1000 cycles with about 87.8%capacity retention at 2 A g^(-1).Furthermore,the morphological evolution and energy storage mechanisms are also revealed via a series of *** work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase-dependent cathodes in zinc-ion batteries.

关键词： cathode materials phase engineering vanadium oxide zinc-ion batteries

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Selective substitution induced anomalous phonon stiffening within quasi-one-dimensional P–P chains in SiP2

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Nano Research 2023年第1期16卷 1107-1114页

作者： Xueting Dai Feng Qin Caiyu Qiu Ling Zhou Junwei Huang Fanghua Cheng Xiangyu Bi Caorong Zhang Zeya Li Ming Tang Shengqiang Wu Xiaoxu Zhao Yangfan Lu Huiyang Gou Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China School of Materials Science and Engineering Peking UniversityBeijing 100871China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced Research Beijing 100094China

Light-matter interactions in low-dimensional quantum-confined structures can dominate the optical properties of the materials and lead to optoelectronic *** anisotropic layered silicon diphosphide(SiP2)crystal,the embedded quasi-onedimensional(1D)phosphorus–phosphorus(P–P)chains directly result in an unconventional quasi-1D excitonic state,and a special phonon mode vibrating along the P–P chains,establishing a unique 1D quantum-confined *** SiP2 with the homologous element serves as an effective way to study the properties of these excitons and phonons associated with the quasi-1D P–P chains,as well as the strong interaction between these ***,the experimental observation and the related optical spectral understanding of SiP2 with isoelectronic dopants remain ***,with the photoluminescence and Raman spectroscopy measurements,we demonstrate the redshift of the confined excitonic peak and the stiffening of the phonon vibration mode■of a series of Si(P1−xAsx)2 alloys with increasing arsenic(As)*** anomalous stiffening of■is attributed to the selective substitution of As atoms for P atoms within the P–P chains,which is confirmed via our scanning transmission electron microscopy *** optical spectra evolutions with selective substitution pave a new way to understand the 1D quantum confinement in semiconductors,offering opportunities to explore quasi-1D characteristics in SiP2 and the resulting photonic device application.

关键词： SiP2 quasi-one-dimensional structure Raman photoluminescence phosphide

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Effect of surface species on the alcohol-acid adsorption from FTS wastewater on graphene:A structure-capacity study

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Journal of Environmental sciences 2025年第3期149卷 651-662页

作者： Xiao Liu Xiaolong Zhang Chunyu Geng Qinglan Hao Jie Chang Xin Hu Yongwang Li Botao Teng Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityTianjin 300071China National Energy Center for Coal to Liquids Synfuels China Co.Ltd.Beijing 101407China Institute of Sustainability of Chemical Energy and EnvironmentAgency for ScienceTechnology and Research627833Singapore Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal UniversityJinhua 321004China

Fischer-Tropsch synthesis(FTS)wastewater retaining low-carbon alcohols and acids are organic pollutants as a limiting factor for FTS *** this work,the structurecapacity relationships between alcohol-acid adsorption and surface species on graphene were reported,shedding light into their intricate *** graphene oxide(GO)and reduced graphene oxide(rGO)were synthesized via improved Hummers method with flake graphite(G).The physicochemical properties of samples were characterized via SEM,XRD,XPS,FT-IR,and *** alcohol-acid adsorption behaviors and adsorption quantities on G,GO,and rGO weremeasured via theoretical and *** was revealed that the presence of COOH,C=O and C–O species on graphene occupy the adsorption sites and increase the interactions of water with graphene,which are unfavorable for alcoholacid *** equilibrium adsorption quantities of alcohols and acids grow in pace with carbon *** monolayer adsorption occurs on graphene was verified viamodel *** has the highest FTS modeling wastewater adsorption quantity(110 mg/g)due to the reduction of oxygen *** novel findings provide a foundation for the alcoholacid wastewater treatment,as well as the design and development of high-performance carbon-based adsorbent materials.

关键词： Alcohol-acid adsorption Fischer-Tropsch synthesis wastewater Graphene Surface species Density functional theory

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Simultaneous achievement of large electrocaloric effect and ultrawide operating temperature range in BaTiO_(3)-based lead-free ceramic

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Journal of advanced Ceramics 2024年第8期13卷 1234-1241页

作者： Zhaojie Wang Yingzhi Meng Silin Tang Xiang Niu Hongfang Zhang Dingyuan Wang Yisong Bai Bialin Peng Xue Chen Qingqing Ke Sheng-Guo Lu Laijun Liu Guangxi Key Lab of Optical and Electronic Functional Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China School of Microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China School of Physical Science and Technology&Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China Suzhou University of Science and TechnologySuzhou 215009China Qingdao Haier Smart Technology R&D Co. Ltd.Qingdao 266100China School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710071China Guangxi Key Laboratory of Manufacturing System&Advanced Manufacturing Technology Guilin University of Electronic TechnologyGuilin 541004China

The electrocaloric effect(ECE),known for its environmentally friendly characteristics,holds significant promise for advancing next-generation solid-state refrigeration *** a large ECE along with a wide working temperature range near room temperature remains a key developmental *** this study,we successfully obtained a substantial ECE of 1.78 K and an extensive working temperature range of 103 K(AT>1.52 K)near room temperature in CaZrO_(3)-modified BaTiO_(3) lead-free ferroelectric ***,this achievement was verified using direct *** piezoresponse force microscopy(PFM)results suggest that the broad temperature range is attributed to the formation of ferroelectric microdomains and polar nanoregions(PNRs).Furthermore,X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible(UV-Vis)spectroscopy reveal a decrease in the oxygen vacancy concentration and an increase in the bandgap for higher CaZrO_(3) doping *** changes synergistically enhance the maximum applied electric field,helping to achieve a high-performance EcE near room *** research presents a straightforward and effective approach for achieving high-performance ECEs in BaTiOg lead-free ceramics,offering promising prospects for application in next-generation solid-state refrigeration technologies.

关键词： BaTiO_(3) electrocaloric effect oxygen vacancy band-gap

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Harnessing decellularised extracellular matrix microgels into modular bioinks for extrusion-based bioprinting with good printability and high post-printing cell viability

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Biomaterials Translational 2023年第2期4卷 115-127页

作者： Hanyu Chu Kexin Zhang Zilong Rao Panpan Song Zudong Lin Jing Zhou Liqun Yang Daping Quan Ying Bai Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Guangdong Engineering Technology Research Centre for Functional Biomaterials Key Laboratory for Polymeric Composite&Functional Materials of Ministry of EducationSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

The printability of bioink and post-printing cell viability is crucial for extrusion-based bioprinting.A proper bioink not only provides mechanical support for structural fidelity,but also serves as suitable three-dimensional(3D)microenvironment for cell encapsulation and *** this study,a hydrogel-based composite bioink was developed consisting of gelatin methacryloyl(GelMA)as the continuous phase and decellularised extracellular matrix microgels(DMs)as the discrete phase.A flow-focusing microfluidic system was employed for the fabrication of cell-laden DMs in a high-throughput *** gentle mixing of the DMs and GelMA,both rheological characterisations and 3D printing tests showed that the resulting DM-GelMA hydrogel preserved the shear-thinning nature,mechanical properties,and good printability from *** integration of DMs not only provided an extracellular matrix-like microenvironment for cell encapsulation,but also considerable shear-resistance for high post-printing cell *** DM sizes and inner diameters of the 3D printer needles were correlated and optimised for nozzle-based ***,a proof-of-concept bioink composedg of RSC96 Schwann cells encapsulated DMs and human umbilical vein endothelial cell-laden GelMA was successfully bioprinted into 3D constructs,resulting in a modular co-culture system with distinct cells/materials ***,the modular DM-GelMA bioink provides a springboard for future precision biofabrication and will serve in numerous biomedical applications such as tissue engineering and drug screening.

关键词： 3D bioprinting bioinks cell viability decellularised extracellular matrix microgels

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