简介：LuminescencelifetimeofCe（Ⅲ）forCe0.9RE0.1P5O14,whereREdenotesrareearthionsotherthanCe（Ⅲ）,wasmeasuredbymeansofthetime-correlatedsinglephotoncountingtechnique.Ithasbeenfoundthatthelifetimedataarecapableofelucidatingtheenhancementorquenchingofcerium（Ⅲ）luminescencebyalienREions（otherthanCe）indoublydopedceriumpentaphosphatecrystal.

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简介：Inthepasttenyearstheeomplementarytristimulusspeetrophotometryll],eTs,hasseenitsdiverseappli-eations{2一61thoughmostresearehesremaininrelativelysimpesystems,andlessworkhasbeeninvolvinkinetiereaetions.AnattemPthasbeenmadeontheinvestigationofsomecomPlieatedsystemseontainingrareearthsandmeta一acetylchloroPhosPhonaz

简介：ThechemicalstateofgrainboundarycosegregationofCeandPinFe-P-CealloysystemwasstudiedbymeansofAugerElectronSpectroscopy(AES).TheAugerpeaksofCesegregatedatgrainboundariesarefoundwithintherangeof60～180eV.BycomparingwiththeAugerspectraoftheFe-Ce-Pintermetalliccompound,itissupposedthatthereisatwo-dimensionalinterfacialphaseatgrainboundarieswithCeandPcosegregationwhichissimilartothestructureoftheFe-Ce-Pcompound.

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简介：Aseriesofthecoconutactivatedcarbons(CAC)basedabsorbentsmodifiedwithCuandCe(Cu/CAC,Cu/Ce/CAC)werepreparedbyimpregnationtechnologyforcarbondioxidecapture.TheadsocrptionequilibriumsofCO2onCu/CACandCu/Ce/CACweremeasured.TheresultsshowedthattheadsorptioncapacityofCO2ontotheactivatedcarbonmodifiedwithCu/Ceincreasedwiththedecreasingtemperatureinthesamepressure.TheadsorptioncapacityofCO2onCu/CACwashigherthanthatoftheblankCAC,andcomparedwiththeCu/CAC,theadsorptioncapacityofCO2ofCu/Ce/CACwiththemassratioofCu/Ce=30wasimprovedat298and303K.Inaddition,theadsorptionequilibriumdataforCO2atvarioustemperatureswasfittedtoLangmuir,FreundlichandD-Risothermmodels.ItwasfoundthattheD-RequationwasthebestmodelforfittingtheadsorptiondataonCu/Ce/CACatdifferenttemperatures.

简介：SphericalYAG:Ce3+phosphorparticleswithnarrowsizedistributionwerepreparedbyspraypyrolysis.Theeffectsoftheconcentrationofsolution,theflowrateofcarriergasandtheannealingtemperatureonthephosphormorphologywerestudied.Theproductivityofprecursorparticlesshowsatrendofdropafterrisingwiththeincreaseofconcentration.Raisingtheflowrateofnitrogencanimprovetheproductivityoftheprecursorparticles.Phosphorpreparedbyspraypyrolysishasobviouslyhigheremissionintensitythanthatsynthesizedbysolidstatereaction,spraypyrolysismakesCe3+ionswelldistributedinthecrystallatticeastheluminescentcenters,andphosphorparticleshaveregularsphericityandnarrowsizedistribution.

简介：Resinsofcomplexesmadefromagarose-Ce4+(RCA-Ce)andchitosan-Ce4+(RCC-Ce)wereprepared.Hydrolysisratesofmethamidophos,omethoateandchlorpyrifostreatedbyRCA-Cewere32.39%,27.12%and46.62%,respectively,thoseofchlorpyrifosandmethamidophosinmungbeansproutjuice38.28%and35.45%,andthatofchlorpyrifosinteaextract59.76%.HydrolysisratesofproteininteaextracttreatedbyRCA-Ceincreasedby86.46%.RCC-Cecouldbeemployedintheapplejuiceproduction.Thecontentsofmethamidophosandparathion-methylinthejuicetreatedbyRCC-Cedecreased58.76%and71.92%.Furthermore,RCC-Cewasusedtoclarificationforbeerbythewaysofacolumn.RCC-Cecouldhydrolyzesensitiveproteinandincreasecontentsoffreeaminoacidinthebeer.Therefore,thebeertreatedbyRCC-CecouldstayoxidationandagingprocedureduetosomemetalionsbeingabsorbedbyRCC-Ce.

简介：Thesynthesisofprecursorofgreenphosphors,LaPO4:Ce,Tb,bymeansofco-precipitationwithcocurrentflowfeedwasstudied.Theeffectsofthereactiontemperature,thekindandconcentrationoftheacidinthebottomwater,andthechargingrateonthephysicalproperties,suchasparticlesize,wereinvestigated.Itisfoundthattheparticlesizeofthepowderiscontrollablebyadjustingacidityinbottomwaterandchargingrate.Thepowderwithdiametersizeof3to5μmwasobtained.ItsXRDandSEMwereanalyzed.XRDpatternsoftheas-preparedgreenphosphorpowdersdisplaythetypicalpeaksofCePO4.SEMshowsthatthemorphologyofpowdersisball-shaped.

简介：AnovelsolidsolutionCe6MoO15wasachieved.Theirstructureandoxideionicconductivitywerestudied.BasedonCe6MoO15,rareearthelementsubstitutiononceriumsiteshowsthatallresultingoxidesenhancetheconductivityfurther,andhavehighoxide-ionconductivity,whichmaybeakindofpromisingmaterialforSOFCs.

简介：Ceriasphereswithdifferentsizesandsulfurizedproductswithcorrespondingmorphologywerepreparedbyhydrothermalandgas-solidreactionmethodat600–800°CunderCS2atmosphereforashorttime,respectively.Dimensionaleffectinpreparationofγ-Ce2S3wasfirstlyinvestigatedbymeansoftechniquessuchasscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),thermalgravimetricanalysis(TGA)andspectrophotometer.Theresultsshowedthatwhenceriananoparticleswithsmallsizewereusedasprecursors,theγ-Ce2S3couldbepreparedatthelowertemperatureandthebadlysinteredproductswereobtained;whenceriananoparticleswithlargesizewereemployedasprecursors,pureγ-Ce2S3wasdifficultlyobtainedevenifthetemperaturewasupto800°Candtheproductstendedtokeeptheiroriginalsize.Theheat-resistancepropertyoftheγ-Ce2S3withlargesizewasbetterthanthesmallerone,andthepureγ-Ce2S3preparedfromprecursorwithsmallsizehadagoodpigmentaryperformance.

简介：有不同元素dopings的极其细小的基于Ce的氧化物nanoparticles(Zr，Y)被传播micropores的一起沉淀(MDC)的方法作为降水代理人用氨答案综合。为煤烟氧化的催化剂的活动被规划温度的氧化(TPO)评估反应。基于Ce的氧化物在这准备了学习为在在煤烟粒子和催化剂之间的松开的接触的条件下面的煤烟氧化的展出高催化的活动，和为煤烟燃烧的极其细小的Ce0.9Zr0.1O2nanoparticle的催化活动最高，364是其T10，T50和SCO2m，442???‰眠?ㄥ‵瑷吗？

简介：YAG:Ce3+(Yttriumaluminumgarnet)fluorescencepowdersweresuccessfullypreparedbyco-precipitationmethodusingaluminumnitrate,yttriumnitrate,cerousnitrateasthestartingmaterialsandammoniumcarbonateasprecipitant.TheproductswerecharacterizedbyX-raypowderdiffraction,luminescencespectrometer,transmissionelectronmicroscope(TEM).TheXRDresultsshowedthattheobtainedYAG:Ce3+fluorescencepowdershadthecrystallinestructuresofYAGatcalcinationstemperatureof900oCandtheTEMresultsshowedthatthegraindiameterswereabout100nm.TheYAG:Ce3+fluorescencepowders,synthesizedbyco-precipitationmethod,hadthebestluminescencepropertywhentheCedopingamountwasx=0.06inthemolecularformulaofY3-xCexAl5O12,thecalcinationstimewas2handthecalcinationstemperaturewas1000°C.

简介：TheCe-Fe-OmixedoxidewitharatioofCe/Fe=7:3,whichwaspreparedbycoprecipitationmethodandemployedasoxygencarrier,fordirectpartialoxidationofmethanetosyngasintheabsenceofgaseousoxygenwasexplored.ThemixedoxidewascharacterizedbyX-raydiffraction(XRD),X-rayphotoelectronspectroscopy(XPS)andscanningelectronmicroscopy(SEM),andthecatalyticperformanceswerestudiedinafixed-bedquartzreactorandathermogravimetricreactor,respectively.Approximately99.4%H2se...

简介：Fe/Cu/Cemodifiedcoal-basedactivatedcarbon(AC)waspreparedbythesol-gelmethod,andtheeffectofFe/Cu/CeoncatalyticpropertiesofFe/AC,Fe-Cu/ACandFe-Cu-Ce/ACwasinvestigatedinthehydrolysisofcarbonylsulfide(COS)at50°C.Theirsurfacepropertieswereevaluatedbymeansofnitrogenadsorptionandwerecharacterizedbyusingscanningelectronmicroscopy(SEM),X-raydiffracto-metry(XRD)andX-rayphotoelectronspectroscopy(XPS).ThecatalyticactivitiesresultsshowedthatadditionofCuandCe...

简介：InordertoinvestigatetheeffectofCe-dopingonthecatalystsderivedfromhydrotalcite-likeprecursorsforcarbonylsulfide(COS)hydrolysis,aseriesofZn-Ni-Al-Cehydrotalcite-likecompoundswerepreparedbyco-precipitationmethodandthecatalyticactivityoftheirderivedcompositeoxideswerestudiedat50oC.TheeffectonthestructuralpropertiescausedbyCedopingwasstudiedbytheX-raydiffractometer(XRD),scanningelectronmicroscopy(SEM)andenergydispersivespectrometer(EDS).ThecatalyticactivitiesresultsshowedthatadditionofCeenhancedthecatalyticactivitiessignificantly,butexcessiveCe-dopinghadanegativeeffectonCOShydrolysis.XRD,SEMandEDSresultsillustratedthat,comparedwiththeCe-freesample,theparticlesizeofoxidesolidsdecreasedandthedegreeofdispersionincreasedduetoCedoping.

简介：Y3Al5O12:Ce3+isthemostfamousphosphormaterialduetoitsexcellentphotolumincentproperties.Here,throughfirst-principlescalculation,theeffectofcarboninterstitialdefectsonY3Al5O12:Ce3+phosphorwasinvestigated.Itisfoundthatthecarboninterstitialstendtooccupythenext-nearestsitesofCe3+ioninY3Al5O12:Ce3+lattice.Specially,theseinterstitialdefectscanshortentheCe3+-O2-bondlength,leadingtoalargercrystalfieldsplittingof5dorbitaloftheCe3+atomandbigger5dcentroidshift.ThesetwofactorscausetheemissionspectrumofY3Al5O12（C）:Ce3+redshiftcomparedwiththatofY3Al5O12:Ce3+.Moreover,withourcomparisonexperiment,wefindthattheY3Al5O12（C）:Ce3+hasanobviousredshiftcomparedwiththatofY3Al5O12:Ce3+system,whichisinaccordwithourfirstprinciplescalculation.OurworksystematicallyinvestigatestheimpactofthecarboninterstitialdefectonY3Al5O12:Ce3+,andprovidesanewroutetotunetheemissionspectruminY3Al5O12:Ce3+.

简介：将变形AZ31镁合金作为研究对象,研究了将不同含量的元素Gd和Ce加入该合金模型之后形成的AZ31-8Re镁合金的力学性能和铸态组织等特性以及镁合金的金相微观组织和力学性能,系统地比较了不同含量的稀土元素对镁合金力学性能的影响,探讨了稀土元素Gd和Ce对AZ31变形镁合金的金相组织的影响以及对其的时效硬化行为。

简介：TheeffectsofUVAphotoirradiatedCe(Ⅳ)dopedTiO2nanoparticle(CDTP)onratcoloncarcinomacellline(C26)growth,cellcycledistribution,andmorphologywerestudiedbyMTTassay,FlowCytometry,andfluorescentstaining.Theresultsindicatethatabout64.6%cellsarekilledafter24hby180μg·ml-1CDTPwhen8minexposedtoUVA,over90%deadfor30mingroup,relativeto18.7%,41.5%ofTiO2atthesameconditionrespectively.Hoe33258stainingofthefixedcellsrevealstypicalapoptoticstructures(apoptoticbodies),andcellsarearrestedinG0/G1phase.

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