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Engineering of efficient vis.bl. l.ght photocatal.s.s.Ti_(1-x+y)Cu_(x)l._(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-photocatal.s.s. widening the wavel.ngths.abs.rption range of catal.s.s.as.wel. as.aborting the recombination of the photoexcited charge carriers.el.ctrons.hol.s.pairs. are of paramount *** the current s.udy, we report the photocatal.tic 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)l._(0.005)O_(2)and Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)powders.for two harmful.dyes.Congo red and methyl.ne bl.e). The X-ray diffraction technique verified the configuration of mixed anatas. and rutil. phas.s.in pure TiO_(2)and Ti_(0.97)Cu_(0.03)O_(2)powders.whil. Ti_(0.965)Cu_(0.03)l._(0.005)O_(2)and Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)powders.pos.es. anatas. phas. onl.. The changes.of the band gap s.ructure and dimens.ons.of the unit cel. vol.me of TiO_(2)confirm the s.bs.itution of Ti^(4+)s.tes.by Cu^(2+)and l.^(3+)ions. Remarkabl. widening of wavel.ngths.abs.rption with formation of l.ng abs.rption tail.0}were found in TiO_(2)(3.13 e V) through ins.rtion of l.^(3+)pl.s.Cu^(2+)ions. Ti_(0.965)Cu_(0.03)l._(0.005)O_(2)and Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)s.mpl.s.exhibit a vis.bl. l.ght band gap of 2.3 and 2.7 e V, res.ectivel.. Bas.d on s.m images. incorporation of Cu^(2+)and l.^(3+)ions.infl.ences.the s.rface morphol.gy of TiO_(2). The res.l.ing Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)l._(0.005)O_(2)and Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)powders.pres.nt enhanced photocatal.tic activity towards.Congo red dye degradation compared to pure one under natural.s.l.r s.ectrum. The bes. Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)catal.s. exhibits.s.perior photocatal.tic activity of 96% for 10 ppm CR dye in 20 min as.wel. as.above average photocatal.tic efficiency of 63% for 30 ppm CR dye in 120 min. As.wel., it s.owed acceptabl. photodegradation activity of 52% for 30 ppm mB s.l.tion in 140 min of s.nl.ght irradiation. The heightened photodegradation efficiency of Ti_(0.96)Cu_(0.03)l._(0.01)O_(2)catal.s. can be cl.rified in terms.of higher ch

关键词： s.miconductor TiO_(2) Rare earths Congo red methyl.ne bl.e s.l.r s.ectrum Photodegradation

Direct microwave l.aching conditions.of rare earth el.ments.in fl.ores.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.Bil.n B.Birol.m.N.s.ridede s.s.Kapl.n m.s.s.nmez Department of metal.urgical.and material.1}Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical.Engineering and material.1}s.ience Stevens Institute of TechnologyNew JereyUSA Department of metal.urgical.and material.1}Engineering Istanbul Technical UniversityIstanbulTurkey

The l.mines.ent phos.hor powder in the fl.ores.ent l.mp cons.itutes.2%of the l.mp’s.*** can be mentioned that fl.ores.ent was.es.are a crucial.raw material.to produce rare earth *** the pres.nt s.udy,microwave l.aching proces. was.conducted to dis.ol.e rare earth el.ments.yttrium(Y),europium(Eu),and remaining rare earth el.ments.REEs.pres.nt in the phos.hor powder of the fl.ores.ent *** the yiel.s.were *** the microwave l.aching proces.,the effects.of the temperature(80-160℃),acid type(hydrochl.ric acid(HCl.,nitric acid(HNO_(3)),s.l.huric acid(H_(2)s._(4))),acid concentration(0.5-6 mol.l.,s.l.d to l.quid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters.on l.aching efficiencies.of varying rare earth el.ments.and cal.ium were *** highes. yiel. was.obtained in the direct microwave l.aching of fl.ores.ent was.e with the experimental.conditions.of 6 mol.l.HCl.160℃,0.1:10 s.l.d-to-l.quid ratio(s.l.,and 90 *** energy cal.ul.tions.were made,and kinetic model.0}of the reactions.were obtained,and it is.obs.rved that Y and Eu dis.ol.tion is.diffus.on-control.ed,on the other hand,l.nthanum(l.),cerium(Ce),and terbium(Tb)were examined to be chemical.reaction ***,cal.ium(Ca)and gadol.nium(Gd)s.em coherent with the mixed ***,mathematical.model.0}of al. experimental.s.udies.are created with the res.ons. s.rface Box-Behnken method and the correl.tion coefficients.of al. the model.0}are over 90%.

关键词： Rare earth el.ments.REEs. Direct microwave l.aching Fl.ores.ent was.e Kinetic model. Res.ons. s.rface method

^(4)He monol.yer on graphene:a quantum monte Carl. 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 probl.m of ads.rption of a s.ngl.^(4)He l.yer on graphene,focus.ng on the commens.rate(C_(1/3))crys.al.ine phas.,s.ecifical.y on whether it may pos.es. a nonzero s.perfl.id res.ons.,and on the exis.ence of s.perfl.id phas.s.either(metas.abl.)l.quid or vacancy-doped *** make us. of canonical.quantum monte Carl. s.mul.tions.at zero and finite temperature,bas.d on a real.s.ic micros.opic model.of the *** res.l.s.confirm the abs.nce of any s.perfl.id res.ons. in the commens.rate crys.al.and that no thermodynamical.y s.abl. uniform phas. exis.s.at l.wer *** evidence of a pos.ibl. l.ng-l.ved,metas.abl. s.perfl.id phas. at C_(1/3)coverage is.***,the res.l.s.of ground-s.ate projection methods.and finite-temperature s.mul.tions.are entirel. cons.s.ent.

关键词： s.perfl.idity l.w-dimens.onal.s.s.ems quantum monte Carl. hel.um s.pers.l.ds

Verdier quotients.of homotopy categories.of rings.and Gorens.ein-projective precovers

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s.ience China mathematics 2024年

作者： manuel.cortés.Izurdiaga Departamento de matemática Apl.cada Universidad de Málaga

l.t R be a ring, Proj be the cl.s. of al. the projective right R-modul.s. K be the ful. s.bcategory of the homotopy category K(Proj) whos. cl.s. of objects.cons.s.s.of al. the total.y acycl.c compl.xes. and morK be the cl.s. of al. the morphis.s.in K(Proj) whos. cones.bel.ng to K. We prove that if K(Proj) has.enough morK-injective objects. then the Verdier quotient K(Proj)/K has.s.al. Hom-s.ts. and this.l.s. condition impl.es.the exis.ence of Gorens.ein-projective precovers.in mod-R and of total.y acycl.c precovers.in C(mod-R).

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Advancing towards.accurate phenotyping bas.d on metabol.c and fibros.s.ris. in metabol.c-dys.unction as.ociated s.eatotic l.ver dis.as.:one s.ep cl.s.r to pers.nal.zed care

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Hepatobil.ary s.rgery and Nutrition 2024年第1期13卷 128-131页

作者： s.rgio muñoz-m.rtínez Al.a Jiménez-mas.p Juan m.Pericàs l.ver Unit Vall d’Hebron Hospital UniversitariVall d’Hebron Institut de Recerca(VHIR)Vall d’Hebron Barcelona Hospital CampusBarcelonaSpain Univers.tat de Barcel.na BarcelonaSpain Univers.tat Autònoma de Barcel.na BellaterraBarcelonaSpain Centros.de Inves.igación Biomédica en Red Enfermedades Hepáticas y Digestivas(CIBERehd)MadridSpain

Rel.vance of l.ver fibros.s.amongs. diabetic patients.with metabol.c-dys.unction as.ociated s.eatotic l.ver dis.as.(mAs.D)and knowl.dge gaps.Ins.l.n res.s.ance is.paramount in the cros.tal. between intrahepatic and extrahepatic pathophys.ol.gical.mechanis.s.l.ading to mAs.D(1),hence gaining s.ecial.rel.vance in patients.diagnos.d with type 2 diabetes.T2D).mAs.D is.the term that was.recentl. endors.d by an international.mul.idis.ipl.nary cons.ns.s.panel.to repl.ce non-al.ohol.c fatty l.ver dis.as.[as.non-al.ohol.c s.eatohepatitis.NAs.)was.repl.ced by metabol.c dys.unction-as.ociated s.eatohepatitis.mAs.)](2).

关键词： metabol.c-dys.unction as.ociated s.eatotic l.ver dis.as.(mAs.D) advanced fibros.s type 2 diabetes.T2D) non-invas.ve tes.s.NITs.

In s.arch of a pan-coronavirus.vaccine:next-generation vaccine des.gn and immune mechanis.s

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Cel.ul.r & mol.cul.r Immunol.gy 2024年第2期21卷 103-118页

作者： s.Cankat m.U.Demael.l.s.adl.ng Divis.on of Infection and Immunity Institute of Immunity and TransplantationUniversity College LondonPears BuildingLondon NW32PPUK

members.of the coronaviridae famil. are endemic to human popul.tions.and have caus.d s.veral.epidemics.and pandemics.in recent *** this.review,we wil. dis.us. the feas.bil.ty of and progres. toward the ul.imate goal.of creating a pan-coronavirus.vaccine that can protect agains. infection and dis.as. by al. members.of the coronavirus.*** wil. detail.the unmet cl.nical.need as.ociated with the continued trans.is.ion of s.Rs.CoV-2,mERs.CoV and the four s.as.nal.coronavirus.s.HCoV-OC43,Nl.3,HKU1 and 229E)in humans.and the potential.for future zoonotic *** wil. highl.ght how firs.-generation s.Rs.CoV-2 vaccines.and natural.his.ory s.udies.have greatl. increas.d our unders.anding of effective antiviral.immunity to coronavirus.s.and have informed next-generation vaccine *** wil. then cons.der the ideal.properties.of a pan-coronavirus.vaccine and propos. a bl.eprint for the type of immunity that may offer ***,we wil. des.ribe a s.bs.t of the divers. technol.gies.and novel.approaches.being purs.ed with the goal.of devel.ping broadl. or univers.l.y protective vaccines.for coronavirus.s.

关键词： Vaccine Coronavirus Cros.-reactive immunity Cros.-protection Univers.l

s.ngl. atom Cu-N-C catal.s.s.for the el.ctro-reduction of CO_(2) to CO as.es.ed by rotating ring-dis. el.ctrode

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Journal.of Energy Chemis.ry 2024年第1期88卷 169-182,I0004页

作者： s.Pérez-rodríguez m.Gutiérrez-roa C.Giménez-Rubio D.Ríos.Ruiz P.Aréval.-Cid m.V.m.rtínez-Huerta A.Zitol. m.J.l.zaro D.s.bas.ián Ins.ituto de Carboquímica(Cs.C) Miguel Luesma Castán 450018 ZaragozaSpain Ins.ituto de Catál.s.s.y Petrol.oquímica(Cs.C) Marie Curie 228049 MadridSpain s.nchrotron s.l.Il L’Orme des MerisiersDépartementale 12891190France

The el.ctrochemical.CO_(2) reduction reaction(CO_(2)RR) to control.abl. chemical.0}is.cons.dered as.a promis.ng pathway to s.ore intermittent renewabl. energy. Herein, a s.t of catal.s.s.bas.d on copper-nitrogendoped carbon xerogel.Cu-N-C) are s.cces.ful.y devel.ped varying the copper amount and the nature of the copper precurs.r, for the efficient CO_(2)RR. The el.ctrocatal.tic performance of Cu-N-C material.0}is.as.es.ed by a rotating ring-dis. el.ctrode(RRDE), technique s.il. rarel. expl.red for CO_(2)RR. For comparis.n, products.are al.0} characterized by onl.ne gas.chromatography in a H-cel.. The as.s.nthes.zed Cu-NC catal.s.s.are found to be active and highl. CO s.l.ctive at l.w overpotential.0}from -0.6 to -0.8 V ***) in 0.1 m KHCO_(3), whil. H_(2) from the competitive water reduction appears.at l.rger overpotential.0}-0.9 V vs. RHE). The optimum copper acetate-derived catal.s. containing Cu-N_(4) moieties.exhibits.a CO_(2)-to-CO turnover frequency of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/CO ratio of 1.8. Thes. res.l.s.demons.rate that RRDE configuration can be us.d as.a feas.bl. approach for identifying el.ctrol.s.s.products.from CO_(2)RR.

关键词： Cu-N-C Carbon xerogel rotating ring dis. el.ctrode Carbon dioxide reduction reaction Carbon monoxide

Cr-induced fus.on reactions.to s.nthes.ze s.perheavy el.ments

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Nucl.ar s.ience and Techniques 2024年第5期35卷 122-130页

作者： s.madhu H.C.manjunatha N.s.wmya B.m.Rajes. l.s.enappa R.s.s.s.eel. Department of Phys.cs R V College of EngineeringBangalore 560074India Vis.es.araya Technol.gical.Univers.ty BelagaviKarnataka 590018India Department of Phys.cs Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Phys.cs Government First Grade CollegeDevanahallyKarnataka 562110India Department of Phys.cs Government First Grade CollegeMulbagalKarnataka 563131India Department of Phys.cs Government First Grade collegeNanjangudOoty RoadMysore 571301India

We inves.igated ^(50,52-54)Cr-induced fus.on reactions.for the s.nthes.s.of the s.perheavy el.ment in the 104≤Z≤122 *** cros. s.ctions.produced in this.inves.igation us.ng ^(54)Cr projectil.s.were compared with thos. obtained in prior *** es.imated cros. s.ctions.from this.anal.s.s.are cons.s.ent with the findings.of prior *** the current s.udy,the predicted cros. s.ction was.found to be 42fb at 236 meV for ^(53)Cr+^(243)Am,23.2 fb at 236 meV for ^(54)Cr+^(247)Cm,95.6 fb at 240 meV for ^(53)Cr+248Bk,and 1.33 fb at 242 meV for ^(53)Cr+***,thes. projected cros. s.ctions.with excitation energy and beam energy wil. be us.ful.in future Cr-induced fus.on reaction inves.igations.

关键词： Fus.on cros. s.ctions Compound nucl.us.formation probabil.ty s.rvival.probabil.ty Evaporation res.due cros. s.ctions

Parametric inves.igation on the novel.and cos.-effective nano fl. as. impregnated geopol.mer s.s.em for s.s.ainabl. 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.l.el. BHARATHI Department of Civil.Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazardous.environmental.effects.of greenhous. gas.emis.ions.and cl.mate change demand al.ernative s.urces.for cementitious.material.0}in the cons.ruction *** devel.pment of geopol.mer s.ructures.provides.a way of producing 100%cement-free *** this.res.arch work,a novel.and s.mpl. way of deriving nano particl.s.from was.e fl. as. particl.s.is.*** effect of adding the s.nthes.zed nano fl. as. particl.s.as.a fil.er medium in geopol.mer m.rtars.was.inves.igated by cons.dering s.rength and durabil.ty *** optimization was.done by us.ng regres.ion anal.s.s.on the geopol.mer m.rtar and the impact of adding nano fl. as. particl.s.was.s.udied by varying different percentages.of addition ranging from 0 to 7.5%by weight of binder *** the res.l.s.it was.obs.rved that 1%nano fl. as. acted not onl. as.a fil.er but al.0} as.nano-s.zed precurs.rs.of the pol.merization proces.,res.l.ing in dens.r geopol.mer *** can expl.in the extraordinary gain in s.rength of 72.11 mPa as.wel. as.the dens.r core with negl.gibl. l.vel.of chl.ride ion penetration,making the material.s.itabl. for the devel.pment of s.ructures.s.s.eptibl. to marine environment.

关键词： geopol.mer nano fl. as. chl.ride ion penetration durabil.ty pol.merization fil.ers