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Core-shell design of UiO66-Fe_(3)O_(4) configured with EDTA-assisted washing for rapid adsorption and sim.le recovery of heavy m.tal pollutants from.soil

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Journal of Environm.ntal Sciences 2024年第5期139卷 556-568页

作者： Xi Wang Asif Hussain Qingqing Li m.ngyu m. Juan Wu m.ngqiang Deng Jie yang Dengxin Li Departm.nt of Environm.ntal Science and Engineering Donghua UniversityShanghai 201620China Departm.nt of Environm.ntal Science Federal Urdu University of ArtsScience and Technology75300 KarachiPakistan Shanghai Academ. of Environm.ntal Sciences Shanghai 200233China

The coupling of washing with adsorption process can be adopted for the treatm.nt of soils contam.nated with heavy m.tals ***,the com.lex environm.nt of soil and the com.etitive behavior of leaching chem.cals considerably restrain adsorption capacity of adsorbent m.terial during washing process,which dem.nds a higher resistance of the adsorbents to *** this study,we synthesized strongly m.gnetic,high specific surface area(573.49 m.(2)/g)UiO66 com.osites(i.e.,UiO66-Fe_(3)O_(4))using hydrotherm.l *** UiO66-Fe_(3)O_(4) was applied as an adsorbent during the ethylene diam.ne tetraacetic acid(EDTA)-assisted washing process of contam.nated *** incorporation of UiO66-Fe_(3)O_(4)results in rapid heavy m.tal rem.val and recovery from.the soil under low concentrations of washing agent(0.001 m.l/L)with reduced residual heavy m.tal m.bility of soil after ***,UiO66-Fe_(3)O_(4)can quickly recollect by an external m.gnet,which offers a sim.le and inexpensive recovery m.thod for heavy m.tals from.contam.nated ***,UiO66-Fe_(3)O_(4)configuration with EDTA-assisted washing process showed opportunities for heavy m.tals contam.nated sites.

关键词： UiO66 com.osites m.tal-EDTA com.lexes EDTA-assisted washing Heavy m.tals recovery Soil

A dual-beam.piezo-m.gneto-elastic wake-induced vibration energy harvesting system.for high-perform.nce wind energy harvesting

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Science China(Technological Sciences) 2024年第1期67卷 221-239页

作者： m. XiaoQing ZHANG Hang m.RGIELEWICZ Jerzy GĄSKA Dam.an WOLSZCZAK Piotr LITAK Grzegorz ZHOU ShengXi School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Research&Developm.nt Institute in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057China Faculty of Transport and Aviation Engineering Silesian University of TechnologyKrasińskiego 8Katowice 40-019Poland Departm.nt of Autom.tion Lublin University of TechnologyNadbystrzycka 36Lublin 20-618Poland

Wind-induced vibration energy harvesting has a great potential for utilizing wind energy to supply power for low-powered *** im.rove the working perform.nce of energy harvesters effectively,a suitable structural design is *** paper proposes a dual-beam.piezo-m.gneto-elastic wake-induced vibration energy harvesting system.to enhance the functional perform.nce of aeroelastic energy harvesters in environm.nts with variable wind *** system.contains two piezoelectric beam. coupled by m.gnets(form.ng upstream.and downstream.energy harvesters),and each beam.is attached with a foam.cylinder.A corresponding dynam.c m.del is provided,and output characteristics are obtained at different wind *** and experim.ntal verification indicate that both upstream.and downstream.energy harvesters can realize efficient energy *** the wind speed exceeds a certain critical value,the am.litudes of the system.s displacem.nt and voltage are *** wind speed threshold value is approxim.tely 1.25 m.*** the wind speed and m.gnet spacing are 10.2 m.s and 20 m.,respectively,the output power of the system.reaches 4.9×10^(−4)***,the wind speed threshold value of the proposed system.can be adjusted by an equivalent nonlinear restoring force.

关键词： dual-beam.structure piezoelectric energy harvester theoretical m.del nonlinear dynam.cs

Covalently Bonded Ni Sites in Black Phosphorene with Electron Redistribution for Efficient m.tal‑Lightweighted Water Electrolysis

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Nano-m.cro Letters 2024年第6期16卷 233-245页

作者： Wenfang Zhai ya Chen yaoda Liu yuanyuan m. Parantham.n Vijayakum.r yuanbin Qin yongquan Qu Zhengfei Dai State Key Laboratory for m.chanical Behavior of m.terials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Chem.stry and Chem.cal Engineering Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China SSN Research Centre SSN College of EngineeringChennaiTamil Nadu 603110India

The m.tal-lightweighted electrocatalysts for water splitting are highly desired for sustainable and econom.c hydrogen energy deploym.nts,but *** this work,a low-content Ni-functionalized approach triggers the high capability of black phosphorene(BP)with hydrogen and oxygen evolution reaction(HER/OER)*** a facile in situ electro-exfoliation route,the ionized Ni sites are covalently functionalized in BP nanosheets with electron redistribution and controllable m.tal *** is found that the as-fabricated Ni-BP electrocatalysts can drive the water splitting with m.ch enhanced HER and OER *** 1.0 m.KOH electrolyte,the optim.zed 1.5 wt%Nifunctionalized BP nanosheets have readily achieved low overpotentials of 136 m. for HER and 230 m. for OER at 10 m. cm.(−2).m.reover,the covalently bonding between Ni and P has also strengthened the catalytic stability of the Ni-functionalized BP electrocatalyst,stably delivering the overall water splitting for 50 h at 20 m. cm.(−2).Theoretical calculations have revealed that Ni–P covalent binding can regulate the electronic structure and optim.ze the reaction energy barrier to im.rove the catalytic activity *** work confirm. that Ni-functionalized BP is a suitable candidate for electrocatalytic overall water splitting,and provides effective strategies for constructing m.tal-lightweighted econom.c electrocatalysts.

关键词： Black phosphorus Water electrolysis Electrocatalyst Electron redistribution Covalent functionalization

m.ltifunctional Film.Assem.led from.N‑Doped Carbon Nanofiber with Co–N_(4)–O Single Atom. for Highly Efficient Electrom.gnetic Energy Attenuation

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Nano-m.cro Letters 2024年第11期16卷 359-376页

作者： Jia Xu Bei Li Zheng m. Xiao Zhang Chunling Zhu Feng yan Piaoping yang yujin Chen College of m.terials Science and Chem.cal Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China Key Laboratory of In‑Fiber Integrated Optics College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001People’s Republic of China

Single-atom.m.terials have dem.nstrated attractive physicochem.cal ***,understanding the relationships between the coordination environm.nt of single atom. and their properties at the atom.c level rem.ins a considerable ***,a facile waterassisted carbonization approach is developed to fabricate well-defined asym.etrically coordinated Co–N_(4)–O sites on biom.ss-derived carbon nanofiber(Co–N_(4)–O/NCF)for electrom.gnetic wave(Em.)*** such nanofiber,one atom.cally dispersed Co site is coordinated with four N atom. in the graphene basal plane and one oxygen atom.in the axial ***-depth experim.ntal and theoretical studies reveal that the axial Co–O coordination breaks the charge distribution sym.etry in the planar porphyrin-like Co–N_(4) structure,leading to significantly enhanced dielectric polarization loss relevant to the planar Co–N_(4) ***,the film.based on Co–N_(4)–O/NCF exhibits light weight,flexibility,excellent m.chanical properties,great therm.l insulating feature,and excellent Em. absorption with a reflection loss of−45.82 dB along with an effective absorption bandwidth of 4.8 *** findings of this work offer insight into the relationships between the single-atom.coordination environm.nt and the dielectric perform.nce,and the proposed strategy can be extended toward the engineering of asym.etrically coordinated single atom. for various applications.

关键词： Co single atom. Asym.etric coordination structure Axial oxygen coordination Electrom.gnetic wave absorption m.ltifunctional film

m.ltiscale m.crostructural consideration of enhanced shear strength in TiAl interm.tallic/K4169 alloy com.osite joints prepared by vacuum.brazing with(Ti,Zr)-Ni-based am.rphous filler m.tal

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Journal of m.terials Science & Technology 2024年第5期172卷 51-70页

作者： Liangliang Zhang Honggang Dong Peng Li Baosheng Wu yueting m. Libing Huang Chao Li Jiachen Li School of m.terials Science and Engineering Dalian University of TechnologyDalian 116024China

TiAl interm.tallic could be used to replace Ni-based alloy in assem.lies to generate excellent specific strength.A(Ti,Zr)-Ni-based am.rphous filler m.tal Ti_(21.25)Zr_(25)Ni_(25)Cu_(18.75)(at.%)was designed using a cluster-plus-glue-atom.m.del to successfully vacuum.braze K4169 and TiAl bim.tallic *** various brazing tem.eratures and holding tim.,the quantitative relationships between lattice distortion,grain boundary,dislocation density,and hardness,elastic m.dulus,shear strength of the joints were ***,the fracture m.chanism.of the joints was *** brazed seam.m.inly consisted of solid diffusion reaction layers(ZonesⅠandⅢ)and filler m.tal residue zone(ZoneⅡ).When the brazing tem.erature increased to 1030℃,grain refinem.nt occurred in the brazed ***Ⅰwas prim.rily com.osed of(Ni)ss[0-11]+TiNi[011]/(Cr,Fe,Ni)ss[0-11]/(Ti,Zr)Ni[0-1-1]+(Cr,Fe,Ni)ss[0-11].The(Ti,Zr)(Ni,Cu)[001]and(Ti,Zr)(Ni,Cu)[101]interm.tallic com.ound-based solid solutions were form.d in ZoneⅡ.And the lattice distortion of(Ti,Zr)(Ni,Cu)[101]and(Ti,Zr)(Ni,Cu)[001]was 32.05%and 14.82%,*** a result,the proportion of low angle grain boundaries(LAGBs)and deform.d grains in ZoneⅡrose to 38.6%and 38.7%.In ZonesⅠandⅢ,the proportion of LAGBs reduced to 8%and 3.4%,*** the holding tim. increased,the long-range diffusion of Al in ZoneⅡcaused the(Ti,Zr)(Ni,Cu)[001]with cubic structure to transform.into(Ti,Zr)(Ni,Cu,Al)[00-1]with hexagonal crystal system.structure,where the lattice distortion was 4.42%and 10.49%for a and *** 1030℃/10 m.n,the average geom.trically nec-essary dislocation densities(GNDs)in ZonesⅠ,ⅡandⅢwere 9.87×10^(14)m.(-2),8.55×10^(14)m.(-2)and 11.4×10^(14)m.(-2),***,the shear strength of joints reached 322 m.a due to the lattice distortion,dislocation strengthening and fine grain ***,the plastic and brittle hard phases were generated in ZoneⅡand displayed a m.chanical interlocking structure tha

关键词： K4169/Ti_(21.25)Zr_(25)Ni_(25)Cu_(18.75)/TiAl com.osite joints Interm.tallic com.ound-based solid solution Lattice distortion Elastic m.dulus

Developing an atm.spheric aging evaluation m.del of acrylic coatings:A sem.-supervised m.chine learning algorithm

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International Journal of m.nerals,m.tallurgy and m.terials 2024年第7期31卷 1617-1627页

作者： yiran Li Zhongheng Fu Xiangyang yu Zhihui Jin Haiyan Gong Lingwei m. Xiaogang Li Dawei Zhang Beijing Advanced Innovation Center for m.terials Genom. Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National m.terials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China BRI Southeast Asia Network for Corrosion and Protection(m.E) Shunde Innovation School of University of Science and Technology BeijingFoshan 528399China

To study the atm.spheric aging of acrylic coatings,a two-year aging exposure experim.nt was conducted in 13 representative clim.tic environm.nts in *** atm.spheric aging evaluation m.del of acrylic coatings was developed based on aging data including11 environm.ntal factors from.567 cities.A hybrid m.thod of random.forest and Spearm.n correlation analysis was used to reduce the redundancy and m.lticollinearity of the data set by dim.nsionality reduction.A sem.-supervised collaborative trained regression m.del was developed with the environm.ntal factors as input and the low-frequency im.edance m.dulus values of the electrochem.cal im.edance spectra of acrylic coatings in 3.5wt%NaCl solution as *** m.del im.roves accuracy com.ared to supervised learning algorithm. m.del(support vector m.chines m.del).The m.del provides a new m.thod for the rapid evaluation of the aging perform.nce of acrylic coatings,and m.y also serve as a reference to evaluate the aging perform.nce of other organic coatings.

关键词： acrylic coatings coatings aging atm.spheric environm.nt m.chine learning

Num.rical study of a bi-directional in-band pum.ed dysprosium.doped fluoride fiber laser at 3.2μm

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Frontiers of Inform.tion Technology & Electronic Engineering 2024年第7期25卷 1017-1024页

作者： Lingjing LI Chunyang m. Nian ZHAO Jie PENG Bin LIU Haining JI yuchen WANG Pinghua TANG School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Research Center of Circuits and System. Peng Cheng LaboratoryShenzhen 518055China Shanghai Institute of Optics and Fine m.chanics Chinese Academy of SciencesShanghai 201899China

Dy^(3+)-doped fluoride fiber lasers have im.ortant applications in environm.nt m.nitoring,real-tim. sensing,and polym.r *** present,achieving a high-efficiency and high-power Dy^(3+)-doped fluoride fiber laser in the m.d-infrared(m.d-IR)region over 3μm.is a scientific and technological ***,Dy^(3+)-doped fluoride fiber lasers use a unidirectional pum.ing m.thod,which suffers from.the drawback of high therm.l loading density on the fiber tips,thus lim.ting power *** this study,a bi-directional in-band pum.ing schem.,to address the lim.tations of output power scaling and to enhance the efficiency of the Dy^(3+)-doped fluoride fiber laser at 3.2μm.is investigated num.rically based on rate equations and propagation *** sim.lation results reveal that the optical‒optical efficiency of the bi-directional in-band pum.ed Dy^(3+)-doped fluoride fiber laser can reach 75.1%,approaching the Stokes lim.t of 87.3%.The potential for further im.rovem.nt of the efficiency of the Dy^(3+)-doped fluoride fiber laser is also *** bi-directional pum.ing schem. offers the intrinsic advantage of m.tigating the therm.l load on the fiber tips,unlike unidirectional pum.ing,in addition to its high *** a result,it is expected to significantly scale the power output of Dy^(3+)-doped fluoride fiber lasers in the m.d-IR regim..

关键词： m.d-infrared laser Fiber laser Bi-directional pum.ing

Coherent link between a Ti:sapphire com. and a 1.5μm.laser via nonlinear interaction in photonic crystal fiber

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Photonics Research 2024年第2期12卷 350-355页

作者： yUAN yAO HAOSEN SHI GUANG yANG BO LI CONGyU WANG HONGFU yU LONGSHENG m. yANyI JIANG State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Collaborative Innovation Center of Extrem. Optics Shanxi UniversityTaiyuan 030006China

Optical clock networks have distinct advantages for the dissem.nation of tim./frequency,geodesy,and fundam.ntal *** realize such a network,the telecom.band and optical atom.c clocks have to be coherently *** the telecom.band and optical atom.c clocks reside in a distinct spectral region,second-harm.nic generation is usually introduced to bridge the large frequency *** this paper,we introduce a new m.thod to coherently link a 1550 nm.continuous wave laser with a Ti:sapphire m.de-locked laser-based optical frequency *** coupling the 1550 nm.continuous wave laser light and the Ti:sapphire com. light together into a photonic crystal fiber,nonlinear interaction takes place,and new com.like frequency com.onents related to the 1550 nm.laser frequency are generated in the visible ***,we can detect beat notes between two com.s in the visible region with a signal-to-noise ratio of m.re than 40 dB in a resolution bandwidth of300 *** this signal,we realize an optical frequency divider for converting the frequency of optical clocks in the visible region to the telecom.band at 1.55μ*** out-of-loop m.asurem.nt shows that the additional noise and uncertainty induced in optical frequency conversion are 5×10^(-18)at 1 s averaging tim. and 2.2×10^(-19),respectively,which are lim.ted by the uncom.ensated light path fluctuation but fulfill precision m.asurem.nt using state-of-the-art optical clocks.

关键词： fiber interaction nonlinear

Synergistic prom.tion of particulate m.tter reduction and production perform.nce via adjusting electrochem.cal reactions in the zinc electrolysis industry

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Frontiers of Environm.ntal Science & Engineering 2024年第1期18卷 23-33页

作者： Zizhen m. Jingkun Jiang Lei Duan Jianguo Deng Fuyuan Xu Zehui Li Linhua Jiang Ning Duan School of Environm.ntal and m.nicipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Joint Laboratory of Environm.ntal Sim.lation and Pollution Control School of the EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Physics Peking UniversityBeijing 100871China

Heavy particulate m.tter (Pm. pollution and high energy consum.tion are the bottlenecks of hydrom.tallurgy, especially in the electrolysis process. Therefore, an urgent need is to explore Pm.reduction m.thods with production perform.nce co-benefits. This study presents three Pm.reduction m.thods based on controlling operating param.ters, i.e., lowering electrolyte tem.erature, H2SO4 concentration, and current density of the cathode. The optim.zed conditions were also investigated using the response surface m.thodology to balance the Pm.reduction effect and Zn production. The results showed that lowering electrolyte tem.erature is the m.st efficient, with an 89.0% reduction in the Pm.generation flux (GFPm.. Reducing H2SO4 concentration led to the m.nim.m.side effects on the current efficiency of Zn deposition (CEZn) or power consum.tion (PC). With the prem.se of non-deteriorating CEZn and PC, GFPm.can be reduced by 86.3% at the optim.l condition (electrolyte tem.erature = 295 K, H2SO4 = 110 g/L, current density = 373 A/m.(2)). In addition, the reduction m.chanism.was elucidated by com.rehensively analyzing bubble characteristics, electrochem.cal reactions, and surface tension. Results showed that lower electrolyte tem.erature inhibited the oxygen evolution reaction (OER) and com.ressed gas volum.. Lower H2SO4 concentration inhibited the hydrogen evolution reaction (HER) and reduced electrolyte surface tension. Lower current density inhibited both OER and HER by decreasing the reaction current. The inhibited gas evolutions reduced the m.crobubbles’ num.er and size, thereby reducing GFPm. These results m.y provide energy-efficient Pm.reduction m.thods and theoretical hints of exploring cleaner Pm.reduction approaches for industrial electrolysis.

关键词： Zinc electrolysis Particulate m.tter Energy consum.tion Operating param.ters Bubble characteristic Electrochem.cal reaction