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Versatile BiFeO_(3) shining in piezocatalysis:From materials engineering to diverse applications

Journal of Advanced Ceramics 2025年第3期14卷 1-27页

作者： Jian Dai Zhenhao Fan Hang Xie Yitao Jiao Fu Huang Ahmad Azmin Mohamad Yunfei Chang Yangke Long Dawei Wang School of Instrumentation Science and Engineering Harbin Institute of TechnologyHarbin 150080China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeMacao 999078China Energy Materials Research Group(EMRG) School of Materials and Mineral Resources EngineeringUniversiti Sains MalaysiaNibong Tebal 14300Malaysia Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China Department of Transportation and Environment Shenzhen Institute of Information TechnologyShenzhen 518172China

The growing global demand for sustainable solutions to address energy and environmental challenges has spurred significant interest in catalytic *** has emerged as a sustainable technology for environmental remediation and energy conversion because of its unique characteristics of harvesting mechanical energy into electrochemical *** BiFeO_(3)(BFO)stands out among a range of piezocatalysts for its distinctive integration of piezoelectric,multiferroic,and optical *** review critically examines piezocatalytic mechanisms,including energy band theory,screening charge effects,and displacement current theory,revealing the intricate roles of internal charges,screening charges,and piezoelectric electrons in driving catalytic ***,the evolution of BFO-based piezocatalysis is systematically reviewed,emphasizing its structural characteristics,representative synthesis methods,performance optimization strategies,and diverse applications,such as organic pollutant degradation,H_(2) production,H_(2)O_(2)generation,CO_(2)reduction,and *** particular,the underestimated ferroelectric polarization effect of BFO on CO_(2)reduction is critically analyzed and *** review identifies critical challenges and outlines future research directions to advance high-efficiency BFO-based piezocatalytic ***,this comprehensive analysis underscores the potential of BFO in piezocatalysis,bridging materials engineering with practical applications and offering insights into future advancements.

关键词： BiFeO_(3)(BFO) piezocatalysis piezoelectric effect environmental remediation energy conversion

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Tailoring V_(2)CT_(x) to form a derivative hybrid by partial oxidation for enhanced lithiation behavior

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Particuology 2023年第3期74卷 1-8页

作者： Ming Lu Yaopeng Zhang Qinhua Gu Wenjuan Han Yujie Qi Xia Zhang Bingsen Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Department of Chemistry College of ScienceNortheastern UniversityShenyang110819China The Joint Laboratory of MXene Materials Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchun130103China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

Utilizing MXene to form the multifunctional derivative is a route to construct high-performance electrode *** address this issue,V_(2)CT_(x) MXene was employed to realize a derivative of VOx/V_(2)CT_(x) MXene via a partial oxidation *** on the annealing in the air atmosphere,the controlled oxidation behavior transformed V_(2)CT_(x) MXene partially to V_(2)O_(5) and formed a derivative hybrid of V_(2)O_(5)/V_(2)CT_(x) *** a result,a package of capacity,rate performance,and cyclability can be *** work explores the derived behavior of MXenes and provides a route for constructing the hybrid with less interface ***,these findings can be extended to other MXene materials.

关键词： V_(2)CT_(x)MXenes Oxidation Lithiation Hybrids

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Thermal Hall effect in a van der Waals triangular magnet FeCl2

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Physical Review B 2023年第6期107卷 L060404-L060404页

作者： Chunqiang Xu Caitlin Carnahan Heda Zhang Milos Sretenovic Pengpeng Zhang Di Xiao Xianglin Ke Department of Physics and Astronomy Michigan State University East Lansing Michigan 48824-2320 USA School of Physical Science and Technology Ningbo University Ningbo 315211 China Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Department of Materials Science and Engineering and Department of Physics University of Washington Seattle Washington 98195 USA

Thermal transport is a pivotal probe for studying low-energy, charge-neutral quasiparticles in insulating magnets. In this Letter, we report an observation of large magnetothermal conductivity and thermal Hall effect (THE) in a van der Waals antiferromagnet FeCl2. The magnetothermal conductivity reaches over ∼700%, indicating strong magnon-phonon coupling. Furthermore, we find an appreciable thermal Hall signal which changes sign concurrently with the spin-flip transition from the antiferromagnetic state to the polarized ferromagnetic state. Our theoretical calculations suggest that, in addition to the Berry curvature induced at the anticrossing points of the hybridized magnon and acoustic phonon modes of FeCl2, other mechanisms are needed to account for the magnitude of the observed THE.

关键词： Magnons Phonons Polarons Thermal Hall effect Thermal conductivity Ferromagnets Holstein-Primakoff method

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Theoretical and experimental study of phase transformation and twinning behavior in metastable high-entropy alloys

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Journal of materials science & Technology 2022年第4期99卷 161-168页

作者： Zhibiao Yang Song Lu Yanzhong Tian Zijian Gu Jian Sun Levente Vitos Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Applied Materials Physics Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholm SE-10044Sweden Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Division of Materials Theory Department of Physics and Materials ScienceUppsala UniversityP.O.Box 516Uppsala SE-75120Sweden Research Institute for Solid State Physics and Optics Wigner Research Center for PhysicsBudapest H-1525P.O.Box 49Hungary

Combined theoretical and experimental efforts are put forward to study the critical factors influencing deformation mode transitions in face-centered cubic *** revisit the empirical relationship between the stacking fault energy(SFE)and the prevalent deformation *** ab initio calculated SFE,we establish the critical boundaries between various deformation modes in the model Cr-Co-Ni solid solution *** agreement between theoretical predictions and experimental observations are *** findings shield light on applying quantum mechanical calculations in designing transformation-induced plasticity and twinning-induced plasticity mechanisms for achieving advanced mechanical properties.

关键词： Metastable alloys Stacking fault energy Twinning Martensitic transformation Co-Cr-Ni alloys

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Investigation of structural, morphological, optical and photoluminescence features of Mg-doped Zn0.96Ni0.04O nanoparticles for optoelectronics applications

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Optical and Quantum Electronics 2024年第11期56卷 1-21页

作者： Veerasubam, R. Muthukumaran, S. Sakthivel, P. Tamil Nadu Madurai625106 India Centre for Materials Science Department of Science and Humanities-Physics Faculty of Engineering Karpagam Academy of Higher Education Tamil Nadu Coimbatore641021 India

Ni and Mg-doped ZnO nanoparticles have been synthesized using a facile sol–gel route. The XRD pattern revealed that the prepared samples have a wurtzite structure. The size of the particles is measured in the range of 13–17 nm, where the maximum size reduction is received for the Mg at. 2%—doped sample and discussed in terms of induced lattice distortion. The blue band absorption at 356 nm exists only in Mg-doped Zn0.96Ni0.04O. The optical band gap is wide-ranging between 3.91 and 3.87 eV, with Mg = 2% -doped Ni:ZnO nanoparticles exhibiting a red shift due to defect concentrations. The FTIR spectra confirmed the existence of Ni and Mg in ZnO structures as well as the presence of molecular vibrations. The PL spectra exposed emissions in UV, blue, and green regions, and changes in their intensities were related to zinc vacancy and oxygen defect sites. The PL spectra exposed emissions in UV, blue, and green regions, and changes in their intensities were related to zinc vacancy and oxygen defect sites. Graphical Abstract: (Figure presented.). © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2024.

关键词： ZnO nanoparticles

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Low-Frequency Raman Study of Large-Area Twisted Bilayers of WS2 Stacked by an Etchant-Free Transfer Method

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ACS Applied materials and Interfaces 2024年第2期16卷 2902-2911页

作者： Boora, Manpreet Lin, Yu-Chuan Chen, Chen Trainor, Nicholas Robinson, Joshua A. Redwing, Joan M. Suh, Jae Yong Department of Physics Michigan Technological University HoughtonMI49931 United States Department of Materials Science and Engineering The Pennsylvania State University University ParkPA16802 United States Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu City300093 Taiwan 2D Crystal Consortium Materials Innovation Platform The Pennsylvania State University University ParkPA16802 United States Department of Chemistry and Department of Physics The Pennsylvania State University University ParkPA16802 United States

Monolayer transition metal dichalcogenides have strong intracovalent bonding. When stacked in multilayers, however, weak van der Waals interactions dominate interlayer mechanical coupling and, thus, influence their lattice vibrations. This study presents the frequency evolution of interlayer phonons in twisted WS2 bilayers, highly subject to the twist angle. The twist angle between the layers is controlled to modulate the spacing between the layers, which, in turn, affects the interlayer coupling that is probed by Raman spectroscopy. The shifts of high-frequency E2g1 (Γ) and A1g (Γ) phonon modes and their frequency separations are dependent on the twist angle, reflecting the correlation between the interlayer mechanical coupling and twist angle. In this work, we fabricated large-area, twisted bilayer WS2 with a clean interface with controlled twist angles. Polarized Raman spectroscopy identified new interlayer modes, which were not previously reported, depending on the twist angle. The appearance of breathing modes in Raman phonon spectra provides evidence of strong interlayer coupling in bilayer structures. We confirm that the twist angle can alter the exciton and trion dynamics of bilayers as indicated by the photoluminescence peak shift. These large-area controlled twist angle samples have practical applications in optoelectronic device fabrication and twistronics. © 2024 American Chemical Society

关键词： Tungsten compounds

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Capillary infiltration of liquid silicon in carbon nanotubes:A molecular dynamics simulation

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Journal of materials science & Technology 2023年第13期144卷 219-223页

作者： Kangyu Zhang Rida Zhao Yongqiang Yang Lichang Yin Sufang Tang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Physics and Electronic Information Huaibei Normal UniversityAnhuiHuaibei 235000China

In this work,by simplifying the nanopores of porous C/C preform with single-walled carbon nanotubes(SWCNT)or double-walled carbon nanotubes(DWCNTs),the infiltration of liquid Si in the SWCNTs and DWCNTs was studied by molecular dynamics(MD)*** a result,a quantitative relationship between tube diameter and liquid Si infiltration rate was established,which has been successfully ap-plied to reproduce the available experiment *** obtained relationship indicates that the capillary infiltration of liquid Si at the nanoscale still conforms to the classic Lucas-Washburn law,however,the liquid Si infiltration quickly stops in small tubes with a diameter of less than 3 nm due to an obvious contraction of the tube *** work may provide theoretical guidance for pore structure optimization of porous C/C preform to fabricate high-density C/SiC composites.

关键词： Silicon carbide Molecular dynamics Capillary infiltration,Liquid silicon,Carbon nanotube

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High sound pressure piezoelectric micromachined ultrasonic transducers using sputtered potassium sodium niobate

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Microsystems & Nanoengineering 2024年第6期10卷 311-323页

作者： Fan Xia Yande Peng Wei Yue Mingze Luo Megan Teng Chun-Ming Chen Sedat Pala Xiaoyang Yu Yuanzheng Ma Megha Acharya Ryuichi Arakawa Lane W.Martin Liwei Lin Department of Mechanical Engineering University of CaliforniaBerkeleyCA 94720USA School of Electronic Science and Engineering Southeast UniversityNanjingJiangsu 210096China Bioengineering and Biomedical Engineering Xi’an Jiaotong UniversityXi’anShaanxi 710049China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA Scientific Research Laboratory Div. Niterra Co.LtdNagoya 461-0005Japan Departments of Materials Science and NanoEngineering Chemistryand Physics and Astronomy and the Rice Advanced Materials InstituteRice UniversityHoustonTX 77005USA

This work presents air-coupled piezoelectric micromachined ultrasonic transducers(pMUTs)with high sound pressure level(SPL)under low-driving voltages by utilizing sputtered potassium sodium niobate K0.34Na0.66NbO3(KNN)films.A prototype single KNN pMUT has been tested to show a resonant frequency at 106.3 kHz under 4 Vp-p with outstanding characteristics:(1)a large vibration amplitude of 3.74μm/V,and(2)a high acoustic root mean square(RMS)sound pressure level of 105.5 dB/V at 10 cm,which is 5–10 times higher than those of AlN-based pMUTs at a similar *** are various potential sensing and actuating applications,such as fingerprint sensing,touch point,and gesture *** this work,we present demonstrations in three fields:haptics,loudspeakers,and *** haptics,an array of 15×15 KNN pMUTs is used as a non-contact actuator to provide a focal pressure of around 160.3 dB RMS SPL at a distance of 15 *** represents the highest output pressure achieved by an airborne pMUT for haptic sensation on human *** used as a loudspeaker,a single pMUT element with a resonant frequency close to the audible range at 22.8 kHz is *** is shown to be able to generate a uniform acoustic output with an amplitude modulation *** the rangefinder application,pulse-echo measurements using a single pMUT element demonstrate good transceiving results,capable of detecting objects up to 2.82 m *** such,this new class of high-SPL and low-driving-voltage pMUTs could be further extended to other applications requiring high acoustic pressure and a small form factor.

关键词： potassium piezoelectric sound

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Unlocking iron-based mixed-phosphate cathode for sodium-ion batteries through off-stoichiometry

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Nano Research 2024年第9期17卷 8119-8125页

作者： Zhaolu Liu Yongjie Cao Ning Wang Hui Yang Hao Zhang Xinyue Xu Nan Wang Jie Xu Yao Liu Junxi Zhang Yongyao Xia Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243002China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

The off-stoichiometric iron-based phosphate(Na_(3.12)Fe_(2.44)(P_(2)O_(7))_(2),denoted as Na3.12)as a low cost and high structure stability cathode material has been widely studied for sodium-ion batteries(SIBs).However,the lower theoretical specific capacity(117 mAh·g^(-1))has seriously limited its practical *** this work,we incorporate varying proportion of sodium-iron phosphate(NaFePO_(4))into the Na3.12 to form a series of new high specific capacity mixed-phosphates Na_(3.12+x)Fe_(2.44+x)(P_(2)O_(7))_(2)(PO_(4))x cathode materials for *** optimizing the introduction amount of NaFePO_(4)into Na_(3.12),the practical reversible of Na_(3.12+x)Fe_(2.44+x)(P_(2)O_(7))_(2)(PO_(4))_(x) increased from 92 to 125.2 mAh·g^(-1).The nano-size Na5.12Fe4.44(P_(2)O_(7))_(2)(PO_(4))_(2) cathode material shows a reversible specific capacity of 125.2 mAh·g^(-1)at 0.1 C in *** at 60 C,it still exhibits a reversible specific capacity of 93.3 mAh·g^(-1)and keeps a capacity retention ratio of 87%after 3000 cycles at 20 ***,we present a novel approach to design a series of off-stoichiometric mixed-phosphates cathode materials for SIBs.

关键词： sodium-ion batteries cathode material iron-based mixed-phosphates off-stoichiometric

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Role of oxygen in laser-induced contamination at diamond-vacuum interfaces

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Physical Review Applied 2024年第2期22卷 024067页

作者： Shreyas Parthasarathy Maxime Joos Lillian B. Hughes Simon A. Meynell Taylor A. Morrison J.D. Risner-Jamtgaard David M. Weld Kunal Mukherjee Ania C. Bleszynski Jayich Department of Physics Materials Department Stanford Nano Shared Facilities Department of Materials Science and Engineering

Many modern-day quantum science experiments rely on high-fidelity measurement of fluorescent signals emitted by the quantum system under study. A pernicious issue encountered when such experiments are conducted near a material interface in vacuum is “laser-induced contamination” (LIC): the gradual accretion of fluorescent contaminants on the surface where a laser is focused. Fluorescence from these contaminants can entirely drown out any signal from, e.g., optically probed color centers in the solid state. Crucially, while LIC appears often in this context, it has not been systematically studied. In this work, we probe the onset and growth rate of LIC for a diamond nitrogen-vacancy center experiment in vacuum, and we correlate the contamination-induced fluorescence intensities to micron-scale physical buildup of contaminant on the diamond surface. Drawing upon similar phenomena previously studied in the space optics community, we use photocatalyzed oxidation of contaminants as a mitigation strategy. We vary the residual oxygen pressure over 9 orders of magnitude and find that LIC growth is inhibited at near-atmospheric oxygen partial pressures, but the growth rate at lower oxygen pressure is nonmonotonic. Finally, we discuss a model for the observed dependence of LIC growth rate on oxygen content and propose methods to extend in situ mitigation of LIC to a wider range of operating pressures.

关键词： Adsorption Chemical reactions Color centers Laser applications Optical interactions with surfaces Optics & lasers Photoinduced effect Quantum optics

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