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Journal of Energy Chemistry 2023年第4期79卷 118-134页

作者： v.M.leal J.s.Ribeiro E.l.D.Coelho M.B.J.G.Freitas Federal University of Espírito santo Department of ChemistryLaboratory of Electrochemistry and ElectrochemistryAv.Fernando Ferrari514VitóriaES 29075-910Brazil

lithium-ion batteries(liBs)containing graphite as anode material and liCoO_(2),liMn_(2)O_(4),and liNi_(x)Mn_(y)Co_(z)O_(2) as cathode materials are the most used worldwide because of their high energy density,capacitance,durability,and ***,such widespread use implies the generation of large amounts of electronic *** is estimated that more than 11 million ton of liBs waste will have been generated by *** recycling can contribute to minimizing environmental contamination and reducing production costs through the recovery of high-value raw materials such as lithium,cobalt,and *** most common processes used to recycle spent liBs are pyrometallurgical,biometallurgical,and *** the current scenario,it is necessary to develop environmentally friendly methods to recycle batteries and synthesize materials with multiple technological *** study presents a review of industrial and laboratory processes for recycling spent liBs and producing materials that can be used in new batteries,energy storage devices,electrochemical sensors,and photocatalytic reactions.

关键词： li-ion batteries Recycling Cathode Battery Hydrometallurgical Pyrometallurgical

linking sedimentary provenance,climate and tectonics in the Neoproterozoic seridóBelt,Borborema Province(NE Brazil)

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Geoscience Frontiers 2023年第6期14卷 414-431页

作者： Carlos.v.A.Ribeiro Marcos C.C.sales Armando l.s.de Oliveira Ricardo sallet Programa de Pós-graduação em Geologia Instituto de GeociênciasUniversidade de Brasília(UnB)CEP 70910-900 BrasíliaDFBrazil Programa de Pós-Graduação em Geociências Universidade Federal de PernambucoDepartamento de GeologiaCentro de Tecnologia e GeociênciasAv.da ArquiteturaCEP 50740-530 RecifePEBrazil Departamento de Geologia Universidade Federal do Rio Grande do NorteCEP 59078-970 NatalRNBrazil

The seridóBelt,at the extreme northeast of Brazil,is one of the s.v.ral Neoproterozoic mobile belts related to the Brasiliano/Pan-African Orogeny in Western *** lithostratigraphy of the seridóBelt comprises basal quartzites and metaconglomerates(Equador Formation)overlain by hornblende-bearing paragneisses,calc-silicate rocks and marbles(Jucurutu Formation)and biotiteschists(seridóFormation).We investigated the sedimentary provenance of these rocks based on an integration of compiled whole-rock geochemistry,sm-Nd isotopes,U-Pb detrital zircon ages and a new set of whole-rock trace elements *** Formation quartzites have major and trace elements patterns that resemble cratonic sandstones,with a typical felsic provenance consistent with the isotopic composition of plutonic Archean to Paleoproterozoic basement *** proxies suggest that these rocks were deposited in fresh waters under anoxic conditions and moderate to intense weathering conditions(CiA=58–79).A shift in provenance led to an increase in intermediate-mafic sources during the deposition of the Jucurutu and seridó*** elements from rock types in these units are nearly identical,yet they differ on the contents of some high field-strength elements(e.g.,sc,v and Ni),which are higher in the seridóFormation than average *** proxies show similar depositional environments,with brackish to marine conditions for the Jucurutu and seridóformations under anoxic to euxinic *** conditions are consistently lower in the Jucurutu Formation(CiA=58–66)in comparison with the seridóFormation(CiA=60–88).Compiled U-Pb data suggest maximum depositional ages of 633±11 Ma and 633±6 Ma for Jucurutu and seridóformations,respectively,suggesting deposition following the ca.645–635 Ma Marinoan *** compared the geochemistry of the seridóFormation schists with currently exposed basement rocks and showed a strong affinity with Neoproterozoic arc-related

关键词： Whole-rock geochemistry Marinoan Glaciation U-Pb detrital zircon Brasiliano Orogeny

Bending sensor based on flexible spin valve

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Chinese Physics B 2023年第5期32卷 655-661页

作者： l i Naumova R s Zavornitsyn M A Milyaev N G Bebenin A Y Pavlova M v Makarova i K Maksimova v v Proglyado A A Zakharov v v Ustinov M.N.Miheev institute of Metal Physics Ural BranchRussian Academy of SciencesS.Kovalevskoi Street 18Ekaterinburg 620990Russia

Flexible spin valves were prepared by magnetron sputtering on polyimide substrates. The buffer layer that reduces significantly the effect of the polymer substrate on the spin valve microstructure and magnetoresistive properties was revealed. Bending deformation was applied to the microobjects based on the flexible spin valves in parallel to anisotropy axes. it was revealed that during the bend the magnetoresistance changes due to the joint impact of both the change of the magnetic field projection on the film plane and the change of the magnetic properties of the ferromagnetic layers. The obtained dependences have been used in construction of bending sensor, in which the flexible spin valve microstripes were united into the Wheatstone bridge.

关键词： spin valve polymer substrate magnetostriction magnetic anisotropy

A high-pinning-Type-Ⅱsuperconducting maglev for iCF target delivery:main principles,material options and demonstration models

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High Power laser science and Engineering 2022年第2期10卷 20-34页

作者： i.v.Aleksandrova E.R.Koresheva E.l.Koshelev P.N.lebedev Physical institute Russian Academy of SciencesMoscow 119991Russia

Nowadays,inertial confinement fusion(iCF)research related to noncontact positioning and transport of free-standing cryogenic targets is playing an increasingly important role in this *** operational principle behind these technologies is the magnetic acceleration of the levitating target carrier(or sabot)made from Type-Ⅱ,high-temperature superconductors(HTsCs).The physics of interaction among levitation,guidance and propulsion systems is based on a quantum levitation of high-pinning HTsCs in the mutually normal magnetic *** paper discusses current target delivery strategies and future perspectives to create different permanent magnet guideway(PMG)systems for iCF target transport with *** particular,s.v.ral PMG building options for optimizing both suspension and levitation of iCF targets using an HTsC-sabot will be *** solutions have been demonstrated for both linear and round PMGs,including the ones with a cyclotron acceleration process to realize high-running velocities of the HTsCsabot for a limited magnetic *** on physics,we describe in detail the main aspects of the PMG building and the results obtained from computations and proof of principle ***-pinning HTsC magnetic levitation promises a stable and self-controlled levitation to accelerate the iCF targets placed in the HTsC-sabots up to the required injection velocities of 200 m/s and beyond.

关键词： high-temperature superconductor-sabot inertial confinement fusion permanent magnet guideway system stability target delivery with levitation:Type-Ⅱsuperconductivity

A New Proof for Congruent Number’s Problem via Pythagorician Divisors

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Advances in Pure Mathematics 2024年第4期14卷 283-302页

作者： léopold Dèkpassi Keuméan François Emmanuel Tanoé UFR Mathematics and Computer science F&#233lix Houphou&#235t Boigny University Abidjan Cote d&#8217Ivoire

Considering Pythagorician divisors theory which leads to a new parameterization, for Pythagorician triplets ( a,b,c )∈ ℕ 3∗ , we give a new proof of the well-known problem of these particular squareless numbers n∈ ℕ ∗ , called congruent numbers, characterized by the fact that there exists a right-angled triangle with rational sides: ( A α ) 2 + ( B β ) 2 = ( C γ ) 2 , such that its area Δ= 1 2 A α B β =n;or in an equivalent way, to that of the existence of numbers U 2 , v 2 , W 2 ∈ ℚ 2∗ that are in an arithmetic progression of reason n;Problem equivalent to the existence of: ( a,b,c )∈ ℕ 3∗ prime in pairs, and f∈ ℕ ∗ , such that: ( a−b 2f ) 2 , ( c 2f ) 2 , ( a+b 2f ) 2 are in an arithmetic progression of reason n;And this problem is also equivalent to that of the existence of a non-trivial primitive integer right-angled triangle: a 2 + b 2 = c 2 , such that its area Δ= 1 2 ab=n f 2 , where f∈ ℕ ∗ , and this last equation can be written as follows, when using Pythagorician divisors: (1) Δ= 1 2 ab= 2 s−1 d e ¯ ( d+ 2 s−1 e ¯ )( d+ 2 s e ¯ )=n f 2;Where ( d, e ¯ )∈ ( 2ℕ+1 ) 2 such that gcd( d, e ¯ )=1 and s∈ ℕ ∗ , where 2 s−1 , d, e ¯ , d+ 2 s−1 e ¯ , d+ 2 s e ¯ , are pairwise prime quantities (these parameters are coming from Pythagorician divisors). When n=1 , it is the case of the famous impossible problem of the integer right-angled triangle area to be a square, solved by Fermat at his time, by his famous method of infinite descent. We propose in this article a new direct proof for the numbers n=1 (resp. n=2 ) to be non-congruent numbers, based on an particular induction method of resolution of Equation (1) (note that this method is efficient too for general case of prime numbers n=p≡a ( ( mod8 ) , gcd( a,8 )=1 ). To prove it, we use a classical proof by induction on k , that shows the non-solvability property of any of the following systems ( t=0 , corresponding to case n=1 (resp. t=1 , corresponding to case n=2 )): ( Ξ t,k ){ X 2 + 2 t ( 2 k Y ) 2 = Z 2 X 2 + 2

关键词： Prime Numbers-Diophantine Equations of Degree 2 & 4 Factorization Greater Common Divisor Pythagoras Equation Pythagorician Triplets Congruent Numbers inductive Demonstration Method infinite Descent BsD Conjecture

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水铁矿对土壤溶解性有机质的吸附固持作用

农业环境科学学报 2024年第3期43卷 627-635页

作者：麦富生李晓雯吕睿沈倩杨健赵好轩 vAHATAlO Anssi v. 肖宜华青岛理工大学环境与市政工程学院山东青岛266000

基于水解法将氯化铁和氢氧化钠合成了一种水铁矿,通过不同浓度水铁矿与土壤溶解性有机质(DOM)的混合避光培养实验,研究了水铁矿对土壤DOM的吸附固持作用。结果表明:在水铁矿浓度为10~30 g·l^(-1)范围内,水铁矿对土壤DOM的吸附能力与其... 详细信息

基于水解法将氯化铁和氢氧化钠合成了一种水铁矿,通过不同浓度水铁矿与土壤溶解性有机质(DOM)的混合避光培养实验,研究了水铁矿对土壤DOM的吸附固持作用。结果表明:在水铁矿浓度为10~30 g·l^(-1)范围内,水铁矿对土壤DOM的吸附能力与其浓度呈正相关。随着培养时间的延长,DOM的光谱斜率(s_(275-295))显著降低,表明水铁矿优先吸附土壤DOM中的大分子芳香族化合物。三维荧光光谱耦合平行因子模型(EEM-PARAFAC)分析表明,土壤DOM包含类腐殖质组分(C1)(Ex/Em=240/410)、类色氨酸组分(C2)[Ex/Em=290(240)/350]及类酪氨酸组分(C3)(Ex/Em=270/300)3种荧光组分。3种组分荧光强度均随着培养时间延长呈现明显降低趋势,且类腐殖质组分的下降最为明显。被水铁矿吸附后,土壤DOM的腐殖化指数(HiX)显著降低且生物源指数(BiX)明显升高,表明随着吸附作用的进行,土壤DOM的腐殖质组分相对占比下降,而自生源组分相对占比上升。研究表明,水铁矿对土壤DOM有显著的吸附固持作用,且对大分子腐殖质物质吸附作用强于对小分子类蛋白组分,水铁矿对土壤DOM分子的固持作用能够提高土壤有机质的生物可利用度,改善土壤环境。

关键词：水铁矿溶解性有机质土壤紫外-可见吸收光谱平行因子分析

Optical Emission spectroscopic study During the Evaporation of Aluminium in the Thermal Plasma Reactor

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Plasma science and Technology 2010年第1期12卷 27-30页

作者： i.BANERJEE N.v.KUlKARNi s.KARMAKER v.l.MATHE s.v.BHORAsKAR A.K.DAs Applied Physics Department Birla Institute of Technology Department of Physics University of Pune Department Bhabha Atomic Research Center

The oxidation of aluminium was studied using optical emission spectroscopy （OEs） during the evaporation of aluminium in traces of oxygen in a thermal plasma reactor. The ratio of the measured line intensities of Al-O with that of Al follows the exact trend as of that obtained from the corresponding line intensities in X-ray diffraction spectra of the synthesized samples. in this paper the inherent capacity of emission spectroscopy in evaluating the growth processes under plasma induced reactions is presented.

关键词： thermal plasma reactor aluminium oxidation optical emission spectroscopy,X-ray diffraction

in situ formation of lDH-based nanocontainers on the surface of AZ91 magnesium alloy and detailed investigation of their crystal structure

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Journal of Magnesium and Alloys 2022年第5期10卷 1268-1285页

作者： Tatsiana shulha M.serdechnova M.H.iuzviuk i.A.Zobkalo P.Karlova N.scharnagl D.C.F.Wieland s.v.lamaka A.A.Yaremchenko C.Blawert M.l.Zheludkevich Helmholtz-Zentrum Hereon Institute of Surface ScienceMax-Planck-Straβe 1Geesthacht 21502Germany Condensed Matter Department Petersburg Nuclear Physics Institute Named by B.P.Konstantinov of National Research Center“Kurchatov Institute”MKR Orlova roshcha 1Gatchina 188300Russian Federation Helmholtz-Zentrum Hereon Institute of Metallic BiomaterialsMax-Planck Straβe 1Geesthacht 21502Germany Department of Materials and Ceramic Engineering CICECO–Aveiro Institute of MaterialsUniversity of AveiroAveiro 3810-193Portugal Faculty of Engineering University of KielKaiserstraβe 2Kiel 24143Germany

in the presented work, the possibility of direct synthesis of lDH(layered double hydroxide) on the AZ91 surface in the presence of a chelating agent(diethylenetriaminepentaacetic acid-DTPA) is reported. Conversion layer of lDH nanocontainers were formed under ambient pressure conditions without carbonate addition in the electrolyte. The obtained lDH was characterized using experimental(sEM,XRD, TGA, XPs, Raman, etc.) and computational methods(thermodynamic calculation, modeling of possible lDH crystal structures). A comparison of three possible lDHs(lDH-OH,-NO_(3) and-CO_(3)) was performed. Based on the experimental results and crystal simulation approach, it was confirmed, that the mixed lDH-OH/CO_(3) is grown on the surface in the presence of DTPA pentasodium salt.

关键词： layered double hydroxides Magnesium alloy Chelating agent Functional coating

The state of gold in phases of the Cu-Fe-s system:in situ X-ray absorption spectroscopy study

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Geoscience Frontiers 2023年第3期14卷 103-116页

作者： Boris R.Tagirov Olga N.Filimonova Alexander l.Trigub ilya v.vikentyev Elena v.Kovalchuk Maximilian s.Nickolsky Andrey A.shiryaev vladimir l.Reukov Dmitry A.Chareev institute of Geology of Ore Deposits(iGEM RAs) 35Staromonetnyi per119017 MoscowRussia National Research Centre‘Kurchatov institute’ 1Akademika Kurchatova pl123182 MoscowRussia institute of Physical Chemistry and Electrochemistry(iPCE RAs) 31Leninsky Prospect119071 MoscowRussia institute of Experimental Mineralogy(iEM RAs) 142432 ChernogolovkaMoscow RegionRussia

Chalcopyrite and bornite are the main Au-bearing minerals at Cu porphyry deposits.v.lcanogenic mass.v. sulfide(vMs)deposits,Cu-Ni deposits of the mafic magmatic complexes,and ores of submarine sulfide *** and intermediate solid solutions with wide compositional variations(bnss and iss–high-temperature chalcopyrite,correspondingly),which can scavenge economic concentrations of Au,appear in the Cu-Fe-s system at ore-forming ***,the state of Au in bnss and iss is yet *** solve this conundrum,we synthesized samples with net chemical composition of bnss and iss,studied them by in situ X–ray absorption spectroscopy(XAs),and used the experimental data to explain the Au distribution among natural ore-forming *** sulfide samples were obtained at 495–700℃ in Au-saturated system by means of salt flux *** bnss contained1.2–1.6 log units more Au than iss:up to 18 wt.%Au in bnss.v. 0.4 wt.%Au in iss at 700*** increase of temperature resulted in the sharp increase of Au concentration in both phases,1 log unit per 100℃ at f(s2)close to s_((l)) *** of Au l_(3)-edge spectra recorded at 25–675℃ revealed that at 25℃ Au exists mainly in the metallic *** t>500℃ the spectral features of Audisappear,and “chemically bound”Au *** Au form of occurrence in the iss field is interpreted as Au-bearing clusters with a stromeyerite-like(CuAgs)*** Cu_(2–x)s and bnss contain Au in a mixture of stromeyeritelike and petrovskaite-like(Au_(0.8)Ag_(1.2)s)*** chemical composition of both forms is close to CuAus,where the nearest Au neighbors are two s atoms at R_(Au-s)=2.34–2.36Å.Results of the present study allow to determine the state of Au and its concentration in the main Cu-bearing minerals of sulfide ores as a function of the T-f(s_(2))-compositional *** to the sharp increase of the CuAus clusters stability with increasing temperature,in high-temperature ores formed at t>350℃ A

关键词： “invisible”gold Bornite solid solution intermediate solid solution Digenite Chalcopyrite X-ray absorption spectroscopy

Gradient microstructure,recrystallization and mechanical properties of copper processed by high pressure surface rolling

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Journal of Materials science & Technology 2022年第31期126卷 182-190页

作者： J.Guo Q.Y.He Q.s.Mei X.Huang G.l.Wu O.v.Mishin College of Materials science and Engineering Chongqing UniversityChongqing400045China southwest Technology and Engineering Research institute Chongqing 400039China school of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China Beijing Advanced innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering Technical University of Denmark2800 Kgs.LyngbyDenmark

The microstructure,hardness and tensile properties have been studied in copper processed by high pressure surface rolling(HPsR)both in the as-deformed condition and after subsequent annealing at 150℃.it is found that a gradient structure with significant differences in the scale of microstructural features is formed by *** deformed microstructure varies from nano-and ultrafine-scale structures with a large fraction of high angle boundaries near the surface to lightly deformed grains at depths of 1-3 mm below the *** tests of 1-mm-thick specimens demonstrate that the asdeformed material has a high strength and a low uniform *** at 150℃results in partial recrystallization,which creates new through-thickness *** for the topmost layer and s.v.ral bands in the adjacent layer,recrystallization is more pronounced close to the *** fraction recrystallized is at least 80%at depths of 60-300μm after annealing for 960 *** fraction recrystallized in the subsurface decreases with increasing depth,and the deformed layer at depths greater than 500μm re-mains largely non-recrystallized after *** partially recrystallized condition demonstrates an improved combination of strength and ductility.

关键词： High pressure surface rolling Copper Gradient microstructure Annealing Hardness strength Ductility