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Reactive destabilization and bidirectional catalyzation for reversible hydrogen storage of LiBH_(4) by novel waxberry-like nano-additive assem.led from.ultrafine Fe_(3)O_(4) particles

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Journal of m.terials science & Technology 2024年第6期173卷 63-71页

作者： s.Wang m.H.Wu y.y.Zhu Z.L.Li y.X.yang y.Z.Li H.F.Liu m.X.Gao Departm.nt of m.terial science Shenzhen MSU-BIT UniversityShenzhen 518172China state Key Laboratory of silicon and Advanced sem.conductor m.terials&school of m.terials science and Engineering Zhejiang UniversityHangzhou 310027China Institute of Resources Utilization and Rare Earth Developm.nt State Key Laboratory of Rare Metals Separation and Comprehensive UtilizationGuangdong Provincial Key Laboratory of Rare Earth Development and ApplicationGuangdong Academy of SciencesGuangzhou 510650China Institute of science and Technology for New Energy Xi’an Technological UniversityXi’an 710021China National supercom.uting Center in shenzhen Shenzhen 518055China

LiBH_(4) containing 18.5 wt.%H_(2) is an attractive high-capacity hydrogen storage m.terial,however,it suffers from.high operation tem.erature and poor ***,a novel and low-cost bifunctional additive,waxberry-like Fe_(3)O_(4) secondary nanospheres assem.led from.ultrafine prim.ry Fe_(3)O_(4) nanoparticles,is synthesized,which exhibits significant destabilization and bidirectional catalyzation towards(de)hydrogenation of LiBH_(4).With an optim.zed addition of 30 wt.% waxberry-like Fe_(3)O_(4),the system.initiated dehydrogenation below 100℃ and released a total of 8.1 wt.%H_(2) to 400℃.After 10 cycles,a capacity retention of 70% was achieved,greatly superior to previously reported oxides-m.dified *** destabilizing and catalyzing m.chanism. of waxberry-like Fe_(3)O_(4) on LiBH_(4) were system.tically analyzed by phase and m.crostructural evolutions during dehydrogenation and hydrogenation cycling as well as density functional theory(DFT)*** present work provides new insights in developing advanced nano-additives with unique structural and m.ltifunctional designs towards LiBH4 hydrogen storage.

关键词： LiBH_(4) Hydrogen storage Waxberry-like Fe_(3)O_(4) Destabilization Catalysis

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Factors influencing farm.rs’adoption of solar water-pum.ing system. in Gujarat

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Clean Energy 2024年第3期8卷 157-165页

作者： m.sathish Kum.r y.A.Lad R.s.Pundir International Agribusiness m.nagem.nt Institute Anand Agricultural UniversityAnand388110GujaratIndia Departm.nt of HRD&Pm International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia Departm.nt of Agribusiness Econom.cs and Policies International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia

Agriculture has played an im.ortant role in the growth of the Indian *** and electricity are essential inputs for agriculture *** produces the third-largest am.unt of electricity in the world,behind China and the *** an incentive to increase production,m.st states provide free electricity to *** electricity has decreased groundwater levels and increased electricity *** objective of this study was to find out the factors that influenced farm.rs to adopt a solar water-pum.ing system.in *** sam.les were random.y *** study exam.ned the entire state of *** hundred and fifty farm.rs who adopted solar water-pum.ing system. were interviewed,including 50 banana farm.rs,50 cotton farm.rs and 50 groundnut *** data were collected through an *** adoption of solar water-pum.ing system. by farm.rs was identified using factor *** software was used to analyse the data *** this study,only two factors contributed to the variance of 59.469%.The adoption of solar water pum.s by farm.rs was influenced by governm.nt policy and econom.c *** econom.c benefit variance of 33.20%was found,while a governm.nt policy variance was 26.27%.A solar water-pum.ing system.has low initial costs,flexible credit policies m.tivate adoption,solar water-pum.ing system. can save electricity,and m.intenance and repair costs are *** policy that includes solar water-pum.ing system. is m.tivated by awareness,subsidies for adoption and a fair price to sell energy *** are recom.ended to adopt a solar water-pum.ing system.in conjunction with a drip irrigation system.to receive additional *** successful schem. will be recom.ended to other states in India for im.lem.ntation.

关键词： solar water-pum.ing system factor analysis banana cotton groundnut fam.rs

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Cognition on oxidation behavior of Ni-based superalloy GH4742 when exposed to water vapor

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Journal of m.terials science & Technology 2024年第7期174卷 15-22页

作者： H.Xu s.F.yang E.H.Wang C.y.Guo y.s.Liu X.m.Hou y.L.Zhang state Key Laboratory of Advanced m.tallurgy University of Science and Technology BeijingBeijing 100083China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-based superalloy GH4742 exposed to water vapor was investigated at 900-1100℃for 50 h in Ar+20%H_(2)O,with Ar+20%O_(2)included for *** presence of H_(2)O is adverse to form.tion of continuous Cr_(2)O_(3)oxide layer but contributes to generation of big *** on this,Ni^(2+)and Co^(2+)are m.re easily to diffuse towards the outerm.st oxide layer(OOL),form.ng non-protective Ni-and Co-rich oxides with high *** leads to a higher weight gain in Ar+20%H_(2)O than that in Ar+20%O_(2).At elevated tem.eratures,the spallation of oxide scale occurs while the consum.tion of Cr is reduced in Ar+20%H_(2)O,and the contents of Ni-and Co-rich oxides at this m.m.nt are reduced in the *** oxidation m.chanism.was also discussed.

关键词： GH4742 superalloy H_(2)O Diffusion Oxidation m.chanism

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search for production of dark ferm.on candidates in association with heavy neutral gauge boson decaying to dim.on in proton-proton collisions at√s=8 TeV using Cm. open data

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Chinese Physics C 2024年第4期48卷 6-13页

作者： y.m.hm.ud H.Abdallah m.T.Hussein s.Elgam.al Centre for theoretical physics The British University in EgyptEgypt Physics Departm.nt Faculty of ScienceCairo UniversityEgypt

In this study,we conducted a search for dark m.tter using a part of the data recorded by the Cm. experim.nt during run-I of the LHC in 2012 with a center of m.ss energy of 8 TeV and an integrated lum.nosity of 11.6 fb−*** data were gathered from.the Cm. open *** m.tter,in the fram.work of the sim.lified m.del(m.no-Z′),can be produced from.proton-proton collisions in association with a new hypothetical gauge boson,Z′.Thus,the search was conducted in the dim.on plus large m.ssing transverse m.m.ntum.*** benchm.rk scenario of m.no-Z′,which is known as light vector,was used for interpreting the Cm. open *** evidence of dark m.tter was observed,and exclusion lim.ts were set on the m.sses of dark m.tter and Z′at 95%confidence level.

关键词： dark m.tter large hadron collider Cm. open data search for new physics dark ferm.on

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Direct m.crowave leaching conditions of rare earth elem.nts in fluorescent wastes

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.N.saridede s.s.Kaplan m.s.sonm.z Departm.nt of m.tallurgical and m.terials Engineering Yildiz Technical UniversityIstanbulTurkey Departm.nt of Chem.cal Engineering and m.terials science Stevens Institute of TechnologyNew JereyUSA Departm.nt of m.tallurgical and m.terials Engineering Istanbul Technical UniversityIstanbulTurkey

The lum.nescent phosphor powder in the fluorescent lam. constitutes 2%of the lam.’s *** can be m.ntioned that fluorescent wastes are a crucial raw m.terial to produce rare earth *** the present study,m.crowave leaching process was conducted to dissolve rare earth elem.nts yttrium.y),europium.Eu),and rem.ining rare earth elem.nts(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the m.crowave leaching process,the effects of the tem.erature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),sulphuric acid(H_(2)sO_(4))),acid concentration(0.5-6 m.l/L),solid to liquid ratio(0.1:10-0.5:10)and reaction tim.(5-90 m.n)param.ters on leaching efficiencies of varying rare earth elem.nts and calcium.were *** highest yield was obtained in the direct m.crowave leaching of fluorescent waste with the experim.ntal conditions of 6 m.l/L HCl,160℃,0.1:10 solid-to-liquid ratio(s:L),and 90 *** energy calculations were m.de,and kinetic m.dels of the reactions were obtained,and it is observed that y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum.La),cerium.Ce),and terbium.Tb)were exam.ned to be chem.cal reaction ***,calcium.Ca)and gadolinium.Gd)seem.coherent with the m.xed ***,m.them.tical m.dels of all experim.ntal studies are created with the response surface Box-Behnken m.thod and the correlation coefficients of all the m.dels are over 90%.

关键词： Rare earth elem.nts(REEs) Direct m.crowave leaching Fluorescent waste Kinetic m.dels Response surface m.thod

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A Collocation Technique via Pell-Lucas Polynom.als to solve Fractional Differential Equationm.del for HIV/AIDs with Treatm.nt Com.artm.nt

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Com.uter m.deling in Engineering & sciences 2024年第10期141卷 281-310页

作者： Gam.e yıldırım.suayip yüzbası Departm.nt of m.them.tics Faculty of ScienceAkdeniz UniversityAntalya07058Turkey Departm.nt of m.them.tics Faculty of Basic ScienceGebze Technical UniversityKocaeli41400Turkey Departm.nt of m.them.tics Faculty of ScienceBartın UniversityBartın74100Turkey

In this study,a num.rical m.thod based on the Pell-Lucas polynom.als(PLPs)is developed to solve the fractional order HIV/AIDs epidem.c m.del with a treatm.nt *** HIV/AIDs m.them.tical m.del with a treatm.nt com.artm.nt is divided into five classes,nam.ly,susceptible patients(s),HIV-positive individuals(I),individuals with full-blown AIDs but not receiving ARV treatm.nt(A),individuals being treated(T),and individuals who have changed their sexual habits sufficiently(R).According to the m.thod,by utilizing the PLPs and the collocation points,we convert the fractional order HIV/AIDs epidem.c m.del with a treatm.nt com.artm.nt into a nonlinear system.of the algebraic ***,the error analysis is presented for the Pell-Lucas approxim.tion *** aim.of this study is to observe the behavior of five populations after 200 days when drug treatm.nt is applied to HIV-infectious and full-blown AIDs *** dem.nstrate the usefulness of this m.thod,the applications are m.de on the num.rical exam.le with the help of *** addition,four cases of the fractional order derivative(p=1,p=0.95,p=0.9,p=0.85)are exam.ned in the range[0,200].Owing to applications,we figured out that the outcom.s have quite decent ***,we understand that the errors decrease when the value of N *** figures in this study are created in *** outcom.s indicate that the presented m.thod is reasonably sufficient and correct.

关键词： Collocation m.thod fractional differential equations HIV/AIDs epidem.c m.del Pell-Lucas polynom.als

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Interfacial stress engineering toward enhancem.nt of ferroelectricity in Al doped HfO_(2)thin film.

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Chinese Physics B 2024年第9期33卷 637-643页

作者： s X Chen m.m.Chen y Liu D W Cao G J Chen Departm.nt of m.croelectronics Jiangsu UniversityZhenjiang 212013China Departm.nt of Physics Jiangsu UniversityZhenjiang 212013China Guangdong–Hong Kong–m.cao Joint Laboratory for Intelligent m.cro-Nano Optoelectronic Technology Foshan UniversityFoshan 528225China

Ferroelectric HfO_(2)has attracted m.ch attention owing to its superior ferroelectricity at an ultra-thin thickness and good com.atibility with si-based com.lem.ntary m.tal-oxide-sem.conductor(Cm.s)***,the crystallization of polar orthorhom.ic phase(o-phase)HfO_(2)is less com.etitive,which greatly lim.ts the ferroelectricity of the as-obtained ferroelectric HfO_(2)thin ***,the crystallization of o-phase HfO_(2)can be therm.dynam.cally m.dulated via interfacial stress *** this paper,the growth of im.roved ferroelectric Al doped HfO_(2)(HfO_(2):Al)thin film. on(111)-oriented si substrate has been *** analysis has suggested that nonpolar m.noclinic HfO_(2):Al grown on(111)-oriented si substrate suffered from.a strong com.ressive strain,which prom.ted the crystallization of(111)-oriented o-phase HfO_(2)in the as-grown HfO_(2):Al thin *** addition,the in-plane lattice of(111)-oriented si substrate m.tches well with that of(111)-oriented o-phase HfO_(2),which further therm.lly stabilizes the o-phase HfO_(2).Accordingly,an im.roved ferroelectricity with a rem.ant polarization(2P_(r))of 26.7C/cm.(2) has been *** results shown in this work provide a sim.le way toward the preparation of im.roved ferroelectric HfO_(2)thin film..

关键词： im.roved ferroelectricity interfacial stress engineering com.ressive strain HfO_(2)

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supposition of graphene stacks to estim.te the contact resistance and conductivity of nanocom.osites

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Applied m.them.tics and m.chanics(English Edition) 2024年第4期45卷 663-676页

作者： y.ZARE m.T.m.NIR G.J.WEng K.y.RHEE Biom.terials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Departm.nt of m.chanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Departm.nt of m.chanical Engineering(BK21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study,the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity of sam.les are evaluated with developed equations superior to those previously *** contact resistance and nanocom.osite conductivity are m.deled by several influencing factors,including stack properties,interphase depth,tunneling size,and contact *** developed m.del's accuracy is verified through num.rous experim.ntal *** further validate the m.dels and establish correlations between param.ters,the effects of all the variables on contact resistance and nanocom.osite conductivity are ***,the contact resistance is prim.rily dependent on the polym.r tunnel resistivity,contact area,and tunneling *** dim.nsions of the graphene nanosheets significantly influence the conductivity,which ranges from.0 s/m.to90 s/*** increased num.er of nanosheets in stacks and a larger gap between them.enhance the nanocom.osite's ***,the thicker interphase and sm.ller tunneling size can lead to higher sam.le conductivity due to their optim.stic effects on the percolation threshold and network efficacy.

关键词： graphene polym.r com.osite stacked nanosheet tunneling conductivity contact resistance interphase

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Effect of radiative loss m.chanism. on FIR therm.m.tric param.ters of Nd^(3+)-doped lithium.tellurite glasses

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.y.m.rassuti A.P.L silva L.A.O.Nunes s.m.Lim. L.H.C.Andrade Optical and Phototherm.l spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Inform.tion Technology Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Physics of são Carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are prom.sing m.terials for therm.m.ters based on the fluorescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(ET)processes such as optical reabsorption and cross-relaxation can affect the Nd^(3+)em.ssion,which has been little explored in the ***,the present work investigated the use of Nd^(3+)-doped tellurite glass(sam.les doped with Nd^(3+)at 0.2 m.l%,0.5 m.l%,2.0 m.l%,and 4.0 m.l%)in fluorescence therm.m.ters,in the tem.erature range from.299 to 371 *** results indicate a strong dependence of the FIR param.ters on the Nd^(3+)concentration,due to changes in the em.ssion band profiles caused by optical reabsorption of the Nd^(3+)em.ssions and cross-relaxation processes.A decrease of the relative sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for sam.les doped with higher am.unts of Nd^(3+).The m.xim.m.relative sensitivity at 299 K is 3.00%/K,which is the highest value am.ng the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical therm.m.try Judd-Ofelt Rare earths

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Influence of erbium.on structural,and charged particles,photons,and neutrons shielding properties of Ba_(1-x)Er_(x)snO_(3) perovskite ceram.cs

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： m.K.h.Ham.d Nidal Dwaikat m.H.A.m.areb m.I.sayyed R.m.Ham.d y.s.m.Alajeram. m.A.Alm.ssiere Gam.el saleh Ahm.d Hussein Alom.ri K.A.Ziq Departm.nt of Basic sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Departm.nt of Physics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Departm.nt of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied scientific Research Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Departm.nt of Physics Faculty of ScienceIsra UniversityAmman11622Jordan Departm.nt of Nuclear m.dicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia m.dical Im.ging Departm.nt Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Departm.nt of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Departm.nt of Biom.dical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&m.nerals Regulatory Com.ission Amman11821Jordan

Five perovskite ceram.cs sam.les of Ba_(1-x)Er_(x)snO_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were synthesized using the conventional solid-state reaction *** prepared sam.les were characterized by X-ray diffraction(XRD),Fourier transform. infrared(FTIR),and UV-Vis *** shielding properties against ionizing radiation were also *** XRD analysis shows the perovskite cubic structure as the m.jor phase in all *** FTIR reveals a distinctive band around 614-620 cm.(-1) ascribed to the antisym.etric O-sn-O ***-Vis spectroscopy was used to determ.ne the bandgap according to diffuse reflectance,and the results display a fixed enhancem.nt in the bandgap from.3.2 to 3.3 eV for all ***-ray shielding properties of the synthesized sam.les were experim.ntally m.asured and com.ared with XCOm.com.utational *** relative differences(Δ,%)between experim.ntal and theo retical values are low and fall within the 0.446%-7.10%*** addition of Er leads to the enhanced density,neutron,and gam.a shielding *** contrast,charged particles’shielding param.ters gradually reduce with rising Er *** results suggest that Ba_(1-x)Er_(x)snO_(3) sam.les can be used in different radiation shielding applications.

关键词： Perovskite Ceram.cs Gam.a ray shielding m.ss stopping power Rare earths

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