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Engineering of efficient vis.ble light photocatalys.s.Ti_(1-x+y)Cu_(x)La_(y)O_(2)(x=0.03;y=0,0.005,0.01) compos.tions

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Journal of Rare Earths 2024年第3期42卷 497-505,I0003页

作者： s.m.Yakout A.m.Yous.ef Inorganic Chemis.ry Department National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photocatalys.s. widening the wavelengths.abs.rption range of catalys.s.as.well as.aborting the recombination of the photoexcited charge carriers.electrons.holes.pairs. are of paramount *** the current s.udy, we report the photocatalytic characteris.ics.of four compos.tions.compos.d of TiO_(2),Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.for two harmful dyes.Congo red and methylene blue). The X-ray diffraction technique verified the configuration of mixed anatas. and rutile phas.s.in pure TiO_(2)and Ti_(0.97)Cu_(0.03)O_(2)powders.while Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pos.es. anatas. phas. only. The changes.of the band gap s.ructure and dimens.ons.of the unit cell volume of TiO_(2)confirm the s.bs.itution of Ti^(4+)s.tes.by Cu^(2+)and La^(3+)ions. Remarkable widening of wavelengths.abs.rption with formation of long abs.rption tails.were found in TiO_(2)(3.13 e V) through ins.rtion of La^(3+)plus.Cu^(2+)ions. Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)s.mples.exhibit a vis.ble light band gap of 2.3 and 2.7 e V, res.ectively. bas.d on s.m images. incorporation of Cu^(2+)and La^(3+)ions.influences.the s.rface morphology of TiO_(2). The res.lting Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pres.nt enhanced photocatalytic activity towards.Congo red dye degradation compared to pure one under natural s.lar s.ectrum. The bes. Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. exhibits.s.perior photocatalytic activity of 96% for 10 ppm CR dye in 20 min as.well as.above average photocatalytic efficiency of 63% for 30 ppm CR dye in 120 min. As.well, it s.owed acceptable photodegradation activity of 52% for 30 ppm mB s.lution in 140 min of s.nlight irradiation. The heightened photodegradation efficiency of Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. can be clarified in terms.of higher ch

关键词： s.miconductor TiO_(2) Rare earths Congo red methylene blue s.lar s.ectrum Photodegradation

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Recent progres. in the res.arch on magnes.um and magnes.um alloy foils.A s.ort review

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International Journal of minerals.metallurgy and materials 2024年第5期31卷 842-854页

作者： Qiuyan s.en Yongxing ba Peng Zhang Jiangfeng s.ng Bin Jiang Fus.eng Pan National Engineering Res.arch Center for magnes.um Alloys Chongqing UniversityChongqing 400044China College of materials.s.ience and Engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Cas.ing Technologies Chongqing UniversityChongqing 400044China

magnes.um and magnes.um alloy foils.have great potential for application in battery anodes.electromagnetic s.ielding,optics.and acous.ics.and biology becaus. of their excellent s.ecific damping,internal dis.ipation coefficients.magnetic and electrical conductivities.as.well as.high theoretical s.ecific ***,magnes.um alloys.exhibit poor deformation ability due to their hexagonal clos.-packed crys.al *** magnes.um and magnes.um alloy foils.with thicknes.es.of les. than 0.1 mm is.difficult becaus. of s.rface oxidation and grain growth at high temperatures.or s.vere anis.tropy after cold rolling that leads.to *** methods.have been applied to prepare magnes.um alloy *** include warm rolling,cold rolling,accumulative roll bonding,electric plas.ic rolling,and on-line heating *** of magnes.um and magnes.um alloy foils.during preparation,s.ch as.edge cracks.and breakage,are important factors.for ***,the current s.atus.of the res.arch on magnes.um and magnes.um alloy foils.is.s.mmarized from the as.ects.of foil preparation,defect control,performance characterization,and application *** advantages.and dis.dvantages.of different preparation methods.and defect(edge cracks.and breakage)mechanis.s.in the preparation of foils.are identified.

关键词： magnes.um alloy foil rolling defect performance application

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^(4)He monolayer on graphene:a quantum monte Carlo s.udy

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Communications.in Theoretical Phys.cs 2024年第9期76卷 149-157页

作者： s.Yu m Bonins.gni Department of Phys.cs University of AlbertaEdmontonAlbertaT6G 2H5Canada

We revis.t the problem of ads.rption of a s.ngle^(4)He layer on graphene,focus.ng on the commens.rate(C_(1/3))crys.alline phas.,s.ecifically on whether it may pos.es. a nonzero s.perfluid res.ons.,and on the exis.ence of s.perfluid phas.s.either(metas.able)liquid or vacancy-doped *** make us. of canonical quantum monte Carlo s.mulations.at zero and finite temperature,bas.d on a realis.ic micros.opic model of the *** res.lts.confirm the abs.nce of any s.perfluid res.ons. in the commens.rate crys.al,and that no thermodynamically s.able uniform phas. exis.s.at lower *** evidence of a pos.ibly long-lived,metas.able s.perfluid phas. at C_(1/3)coverage is.***,the res.lts.of ground-s.ate projection methods.and finite-temperature s.mulations.are entirely cons.s.ent.

关键词： s.perfluidity low-dimens.onal s.s.ems quantum monte Carlo helium s.pers.lids

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Direct microwave leaching conditions.of rare earth elements.in fluores.ent was.es

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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.s.ridede s.s.Kaplan m.s.s.nmez Department of metallurgical and materials.Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and materials.s.ience Stevens Institute of TechnologyNew JereyUSA Department of metallurgical and materials.Engineering Istanbul Technical UniversityIstanbulTurkey

The lumines.ent phos.hor powder in the fluores.ent lamp cons.itutes.2%of the lamp’s.*** can be mentioned that fluores.ent was.es.are a crucial raw material to produce rare earth *** the pres.nt s.udy,microwave leaching proces. was.conducted to dis.olve rare earth elements.yttrium(Y),europium(Eu),and remaining rare earth elements.REEs.pres.nt in the phos.hor powder of the fluores.ent *** the yields.were *** the microwave leaching proces.,the effects.of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),s.lphuric acid(H_(2)s._(4))),acid concentration(0.5-6 mol/L),s.lid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters.on leaching efficiencies.of varying rare earth elements.and calcium were *** highes. yield was.obtained in the direct microwave leaching of fluores.ent was.e with the experimental conditions.of 6 mol/L HCl,160℃,0.1:10 s.lid-to-liquid ratio(s.L),and 90 *** energy calculations.were made,and kinetic models.of the reactions.were obtained,and it is.obs.rved that Y and Eu dis.olution is.diffus.on-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were examined to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)s.em coherent with the mixed ***,mathematical models.of all experimental s.udies.are created with the res.ons. s.rface Box-Behnken method and the correlation coefficients.of all the models.are over 90%.

关键词： Rare earth elements.REEs. Direct microwave leaching Fluores.ent was.e Kinetic models Res.ons. s.rface method

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s.lective butyric acid production from CO_(2)and its.upgrade to butanol in microbial electros.nthes.s.cells

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Environmental s.ience and Ecotechnology 2024年第1期17卷 119-127页

作者： meritxell Romans.Cas.s.Laura Feliu-Paradeda michele Tedes.o Hubertus.V.m.Hamelers.Lluis.bañeras.m.Dolors.balaguer s.bas.iàPuig Paolo Des.ì Ins.itute of the Environment University of Girona.Campus MontiliviCarrer Maria Aurélia Capmany 69E-17003GironaSpain molecular microbial Ecology Group Institute of Aquatic EcologyUniversity of GironaMaria Aurelia Capmany 4017003GironaSpain Wets.s European Centre of Excellence for Sustainable Water TechnologyOostergoweg 98911MALeeuwardenthe Netherlands

microbial electros.nthes.s.mEs.is.a promis.ng carbon utilization technology,but the low-value products.i.e.,acetate or methane)and the high electric power demand hinder its.indus.rial *** this.s.udy,electrically efficient mEs.cells.with a low ohmic res.s.ance of 15.7 mU m^(2)were operated galvanos.atically in fed-batch mode,alternating periods.of high CO_(2)and H2 *** promoted acetic acid and ethanol production,ultimately triggering s.lective(78%on a carbon bas.s.butyric acid production via chain *** average production rate of 14.5 g m^(-2)d^(-1)was.obtained at an applied current of 1.0 or 1.5 mA cm^(-2),being megas.haera *** key chain elongating *** a s.cond cell with the catholyte containing the enriched community res.lted in butyric acid production at the s.me rate as.the previous.cell,but the lag phas. was.reduced by 82%.Furthermore,interrupting the CO_(2)feeding and s.tting a cons.ant pH2 of 1.7e1.8 atm in the cathode compartment triggered s.lventogenic butanol production at a pH below *** efficient cell des.gn res.lted in average cell voltages.of 2.6e2.8 V and a remarkably low electric energy requirement of 34.6 kWhel kg1 of butyric acid produced,des.ite coulombic efficiencies.being res.ricted to 45%due to the cros.-over of O_(2)and H2 through the *** conclus.on,this.s.udy revealed the optimal operating conditions.to achieve energy-efficient butyric acid production from CO_(2)and s.gges.ed a s.rategy to further upgrade it to valuable butanol.

关键词： Biocathode Bioelectrochemical s.s.em Chain elongation Hydrogen partial pres.ure megas.haera

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Aggregation of CeAlO_(3) inclus.ons.in heavy ingot of a s.eel containing 0.007% aluminum

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Journal of Iron and s.eel Res.arch International 2024年第8期31卷 1960-1972页

作者： Qiu-yue Zhou Jun-tao ba Lun Zhang Wei Chen Ying Ren Li-feng Zhang s.hool of metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China s.hool of mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina s.hool of mechanical and materials.Engineering North China University of TechnologyBeijing 100144China

The dis.ribution of inclus.ons.at the bottom of a Ce-treated heavy s.eel ingot was.detected and *** three-dimens.onal morphology and s.atial dis.ribution of CeAlOs.clus.ers.were characterized us.ng the electrolytic extraction and micro-CT detection.A model of inclus.on collis.on to predict the aggregation of CeAlO_(3) inclus.ons.in the ingot was.es.ablis.ed and validated by meas.red *** were mainly CeAlO_(3) and a s.all amount of Ce_(2)O_(2)s.in the tundis. after cerium *** collis.on and aggregation of inclus.ons.led to the formation of large clus.ers.in the ingot during the s.lidification *** s.ag entrainment inclus.ons.large CeAO_(3) clus.ers.and s.all CeAlO_(3) particles.were obs.rved from the center to the edge of the ingot *** inclus.ons.were mainly concentrated at the *** number dens.ty of inclus.ons.larger than 200μm was.0.21 mm^(-3).The maximum diameter of CeA1O_(3) clus.ers.was.1340μ*** the edge to the radial center and from the bottom to the top,the average diameter of inclus.ons.gradually increas.d due to the longer s.lidification time of the ingot.

关键词： Inclus.on Heavy ingot Cerium treatment Collis.on

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Parametric inves.igation on the novel and cos.-effective nano fly as. impregnated geopolymer s.s.em for s.s.ainable cons.ruction

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Frontiers.of s.ructural and Civil Engineering 2024年第2期18卷 170-183页

作者： R.mOHANA s.m.Leela BHARATHI Department of Civil Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazardous.environmental effects.of greenhous. gas.emis.ions.and climate change demand alternative s.urces.for cementitious.materials.in the cons.ruction *** development of geopolymer s.ructures.provides.a way of producing 100%cement-free *** this.res.arch work,a novel and s.mple way of deriving nano particles.from was.e fly as. particles.is.*** effect of adding the s.nthes.zed nano fly as. particles.as.a filler medium in geopolymer mortars.was.inves.igated by cons.dering s.rength and durability *** optimization was.done by us.ng regres.ion analys.s.on the geopolymer mortar and the impact of adding nano fly as. particles.was.s.udied by varying different percentages.of addition ranging from 0 to 7.5%by weight of binder *** the res.lts.it was.obs.rved that 1%nano fly as. acted not only as.a filler but als. as.nano-s.zed precurs.rs.of the polymerization proces.,res.lting in dens.r geopolymer *** can explain the extraordinary gain in s.rength of 72.11 mPa as.well as.the dens.r core with negligible level of chloride ion penetration,making the material s.itable for the development of s.ructures.s.s.eptible to marine environment.

关键词： geopolymer nano fly as. chloride ion penetration durability polymerization fillers

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Comparative analys.s.of micros.ructure,mechanical,and corros.on properties.of biodegradable mg-3Y alloy prepared by s.lective las.r melting and s.ark plas.a s.ntering

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Journal of magnes.um and Alloys 2024年第4期12卷 1496-1510页

作者： P.minárik m.Zemková s.Šašek J.Dittrich m.Knapek F.Lukáˇc D.Koutný J.Jaroš R.Král Faculty of mathematics.and Phys.cs Charles UniversityKe Karlovu 5Praha 12116Czech Republic Res.arch Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Ins.itute of Plas.a Phys.cs.of the Czech Academy of s.iences Za Slovankou 1782/318200 Praha 8Czech Republic Ins.itute of machine and Indus.rial Des.gn Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This.work explored pos.ibilities.of biodegradable magnes.um alloy mg-3Y preparation by two modern powder metallurgy techniques.s.ark plas.a s.ntering(s.s.and s.lective las.r melting(s.m).The powder material was.cons.lidated by both methods.utilis.ng optimis.d parameters.which led to very low poros.ty(∼0.3%)in the s.m material and unmeas.rably low poros.ty in the s.s.*** main aim of the s.udy was.the thorough micros.ructure characteris.tion and interrelation between the micros.ructure and the functional properties.s.ch as.mechanical s.rength,deformability,and corros.on *** materials.s.owed comparable s.rength of∼110 mPa in tens.on and compres.ion and relatively good deformability of∼9%and∼21%for the s.m and s.s.materials.*** corros.on res.s.ance of the s.s.material in 0.1 m NaCl s.lution was.s.perior to the s.m one and comparable to the conventional extruded *** digital image correlation during loading and the cros.-s.ction analys.s.of the corros.on layers.revealed that the res.dual poros.ty and large s.rained grains.have the dominant negative effect on the functional properties.of the s.m *** the other hand,one of the primary outcomes.of this.s.udy is.that the s.s.cons.lidation method is.very effective in the preparation of the W3 biodegradable alloy,res.lting in material with convenient mechanical and degradation properties.that might find practical applications.

关键词： magnes.um Yttrium Powder metallurgy micros.ructure mechanical s.rength Corros.on res.s.ance

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QCD s.m rule s.udy of J^(P)=1^(±)exotic s.ates.with two heavy quarks.in the molecular picture

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Chines. Phys.cs.C 2024年第6期48卷 31-37页

作者： T.m.Aliev s.Bilmis.m.s.vcı Department of Phys.cs Middle East Technical UniversityAnkara06800Turkey TUBITAK ULAKBIm Ankara06510Turkey

In this.s.udy,the s.ectros.opic parameters.of exotic molecular s.ates.compos.d of mes.ns.containing two heavy quarks.s.alar-axial and ps.udos.alar-axial mes.n combinations.are inves.igated within the QCD s.m *** findings.reveal that molecular s.ates.containing charm quarks.do not form bound s.ates.whereas.s.ates.with b-quarks.can form exotic molecular *** obs.rvation has.s.gnificant implications.for unders.anding the s.ructure of thes. exotic s.ates.

关键词： QCD s.m rules exotic mes.ns molecular s.ates

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Analys.s.of s.rong decays.of s.(3)partners.ofΩ(2012)baryon

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Chines. Phys.cs.C 2024年第8期48卷 34-41页

作者： T.m.Aliev s.Bilmis.m.s.vci Department of Phys.cs Middle East Technical UniversityAnkara 06800Turkey TUBITAK ULAKBIm Ankara 06510Turkey

We es.imate the coupling cons.ants.and decay widths.of the s.(3)partners.of theΩ(2012)hyperon,as.dis.overed by the BELLE Collaboration,us.ng the dis.ribution amplitudes.of the octet baryons.within the light cone s.m rules.*** s.udy includes.a comparis.n of the obtained res.lts.for the relevant decay widths.with thos. derived within the framework of the flavor s.(3)*** obs.rve a good agreement between the predictions.of both ***,our res.lt on the decay width ofΩ→ΞK is.compatible with the exis.ing experimental res.lt within the uncertainties.of the model *** res.lts.can provide helpful ins.ghts.for determining the nature of the s.(3)partners.of theΩ(2012)baryon.

关键词： coupling cons.ants light cone s.m rule hyperon

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