简介：TheeuropiumionsdopedMMoO_4(M=Sr,Ba)nanophosphorsweresuccessfullysynthesizedviaafacilehydrothermalmethodusingisopropanol.Therelationshipbetweenphosphorcrystallinephase,morphology,photoluminescentpropertiesandhexadecyltrimethylammoniumbromide(CTAB)concentration,pHvalueinprecursorsolutionwasinvestigated.TheresultsindicatedthatthemorphologyandphotoluminescentpropertieswerestronglyinfluencedbyCTABconcentrationandpHvalueinprecursorsolution.InSrMoO_4:Eu~(3+)hosts,thephosphorsurfacetendedtobecomesmootherastheconcentrationofCTABwasincreased;whileparticlestendedtoagglomerateasincreasingpHvalue.TherelativeintensityratioofchargetransferbandtoEu~(3+)characteristicemissionpeaksofMMoO_4:Eu~(3+)(M=Sr,Ba)waschangedasCTABconcentrationandpHvaluechanged.TheemissionspectraofMMoO_4:Eu~(3+)(M=Sr,Ba)couldbeadjustedbyCTABconcentrationandpHvalueduetotheirimpactsonthestructure.ItwasimportantthatthedifferentmorphologiesandphotoluminescentpropertiesofMMoO_4:Eu~(3+)(M=Sr,Ba)couldbeobtainedbythefacilehydrothermalmethodandmodulatedbychangingCTABconcentrationandpHvalue.

简介：PolycrystallineNd3+andLa3+co-dopedyttriananopowderNd3+:Y1.90La0.10O3fortransparentceramicswassynthesizedbyco-precipitationmethodusingoxalateacidastheprecipitantand(NH4)2SO4astheelectricalstabilizerunderultrasonicradiation.Nanopowderscalcinedatdifferenttemperatureswerecharacterizedwiththermalgravimetric-differentialthermalanalysis(TG/DTA),X-raydiffraction(XRD),transmittingelectronmicroscopy(TEM),energydispersivespectrometry(EDS)andspectralanalysistechniques.Th...

简介：Ternarycomplexesofeuropiumandterbiumwithbenzoicacidand1,10-phenanthroline[RE(BA)3phen](BA=benzoatephen=1,10-phenanthroline)wereintroducedintoasilicamatrixbysol-gelmethod.Thethermalstabilityandluminescencebehaviorofthecomplexesinsilicagelswerestudiedincomparisonwiththecorrespondingsolid-statecomplexesbythermaldecomposition,excitationandemissionspectra.Thethermalstabilityofthecomplexesisenhancedinsilicagelmatrixandtheluminescenceremainesunchanged.

简介：Sm0.2Ce0.8O1.9(SDC)electrolytewaspreparedbyamodifiedsolidstatemethodatrelativelylowsinteringtemperatureswithoutanysinteringpromoters.ThephasecompositionandmicrostructureoftheelectrolyteswereinvestigatedbyX-raydiffraction(XRD)andfieldemissionscanningelectronmicroscopy(FESEM)technologies.ArelativedensityofSDCelectrolytesinteredat1300oCreached97.3%andthemeanSDCgrainsizewasabout770nm.Theirionicconductivityandthermalexpansioncoefficientwerealsomeasuredbyelectrochemicalworkstationanddilatometer.Theelectrolyteattainedahighconductivityof5×10–2S/cmat800oCwithanactivationenergyof1.03eVandaproperthermalexpansioncoefficientof12.6×10–6K–1.

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简介：我们在甲烷(POM)的部分氧化上调查了填满的格子氧的锻烧温度，反应温度，和不同数量的效果到把perovskite类型LaFeO3氧化物用作氧施主而不是气体的氧的合成气体，它被大音阶的第五音胶化方法准备，并且氧化物被XRD，TG/DTA，和赌注描绘。结果显示粒子尺寸增加了，锻烧温度增加，当赌注和CH4变换衰退了，锻烧温度当气体的氧不在时作为氧施主用LaFeO3氧化物增加时。在象上面那样的高水平仍然是的公司选择92%，并且当锻烧温度增加了，稍微增加了。到甲烷空气的LaFeO3氧化物的暴露提高了氧迁居在有由于格子氧和氧化说的Fe离子的减小的损失联机的时间的体积同时。高反应温度对从向为有高公司选择的合成气体生产的表面的体积的氧种类的迁居有利。为由顺序的氧化还原作用反应的POM的产品分发和进化被填满的格子氧的数量与气体的氧决定。最佳的过程应该衰退甲烷的全部的氧化，和增加甲烷的部分氧化的选择。

简介：AnovelTb（III）ternarycomplexTb（p-BBA）_3MAAwassynthesizedwith4-benzoylbenzoicacid（p-BBA）andmethacrylicacid（MAA）asligands.ThecomplexwascharacterizedbyIR,UV-visible,thermogravimetricanalysisandfluorescencespectroscopy.Monitoredat544nm,thecomplexdisplayedwideandstrongexcitationbandat300–400nm,whichmatchedwellwiththe365nm-emittingUVchip.Thecomplexexhibitedexcellentgreenemissionat544nm（~5D_4→~7F_5transitionofTb~（3＋））underanexcitationat365nm.Besides,thecomplexshowedhighthermalstability.Itsintramolecularenergytransferprocesswasfurtherdiscussed.Furthermore,thecomplexalsohadhigherfluorescencelifetime（1.38ms）andhigherquantumyield（0.372）.Finally,electroluminescentpropertiesindicatedthatwhenusedtofabricateLEDwith365nmUVchip（powerefficiencyis18.6lm/W）,thecomplexremaineditsfavorableopticalperformance.TheseresultsimpliedthatTb（p-BBA）_3MAAcouldbeusedasagreenphosphorforNUV-basedwhiteLED.

简介：一系列Ni-CeO2催化剂被一起沉淀方法与Na2CO3准备，NaOH，并且混合急躁(Na2CO3:NaOH；1:1比率)同样急躁分别地。催化表演上的precipitants的效果，Ni-CeO2催化剂的物理、化学的性质在X光检查的帮助下被调查衍射(XRD)，Brumauer-Emmett-Teller方法(赌注)，Fourier变换红外线的光谱学(英尺红外)，thermogravimetry(TG)，和H2-TPR描述。Ni-CeO2催化剂为反向的水气体移动反应关于他们的催化表演被检验，并且他们的催化活动是被评价：Ni-CeO2-CP(Na2CO3:NaOH=1:1)>Ni-CeO2-CP(Na2CO3)>Ni-CeO2-CP(NaOH)。相关到特征结果，催化剂由一起沉淀准备了与，这被发现混合急躁(Na2CO3:NaOH；1:1比率)同样急躁氧空缺的大多数数量与高度驱散的Ni粒子伴随了，它做了相应Ni-CeO2-CP(Na2CO3:NaOH=1:1)催化剂展览最高催化的活动。当时Na2CO3或NaOH急躁在Ni-CeO2催化剂导致了更少或没有氧空缺。作为结果，Ni-CeO2-CP(Na2CO3)和Ni-CeO2-CP(NaOH)，催化剂介绍了差的催化性能。

简介：MonophasicCe~(3+)andPr~(3+)co-dopedyttriumaluminumgarnet(YAG:Ce~(3+),Pr~(3+))nanoparticleswithgooddispersityanduniformgrainsizesintherangeof50–80nmwerepreparedbyatwo-steproute,whichconsistedofamodifiedco-precipitationpreparationofmixedmetalhydroxidehydrateintermediatesatlowtemperatureofabout40oCandasubsequentcalcinationconversionofthesynthesizedintermediatestocrystallinenanoparticleproductsatabout1000oC.Theinfluencesofboththelanthanideion(Ce~(3+)andPr~(3+))dopingconcentrationanddifferentdoping(Ce~(3+)/Pr~(3+))ratioonthephotoluminescenceintensityweresystematicallyinvestigated.Thesynthesized(Ce_(0.6)Pr_(0.4))_(0.04)Y_(2.96)Al_5O_(12)nanoparticleswerenearsphericalnanoclusterswithgooddispersityanduniformsizesintherangeof50–80nmforabout85%oftheparticles.Thestrongestphotoluminescenceintensitywasobservedforthe(Ce_(0.6)Pr_(0.4))_(0.04)Y_(2.96)Al_5O_(12)nanoparticleproducts.

简介：四lanthanide协作建筑群，也就是[行(2,3-DClBA)3(5,5-dmebipy)(H2O)]2(Ln=Sm(1),Eu(2)，Dy(3)，惊讶(4))；2,3-DClBA=2,3-dichlorobenzoate；5,5-dmebipy=5,5-dmethylbipyridine)被元素的分析，红外线的光谱学和单个水晶X光检查衍射综合并且描绘。调查结果显示建筑群3是一个dinuclear分子，并且中心Dy3+是八坐标的。每个dinuclear单位能被H债券和卤素卤素相互作用连接。建筑群2的光性质建议了Eu3+离子的典型强烈排出物。热分析证明建筑群在三分解了步：协作水然后第一被失去中立ligand5,5dmebipy被失去，最后，2,3-DClBAligand被失去。

简介：RE-dopedNi-basedcatalystswerepreparedbysol-gelmethod.ThesecatalystswereappliedtothereactionofCO2reformingCH4tosyngas.ThestudiesrevealthatRE-doped(RE=La,Ce,Sm,Yb)Ni-basedcatalystsshowhighercatalyticactivitythanundopedNi-basedcatalyst,andwiththeincreasingofRE-dopedquantity,thecatalyticactivityofcatalystsexhibitsregularchanges.WhenRE-dopedquantityis0.2%(molarratio),thecatalystsshowthebestcatalyticactivity.

简介：AseriesofCe0.5Fe0.30Zr0.20O2catalystswerepreparedbydifferentmethods(co-precipitationsmethod,citricacidsol-gelmethod,impregnationmethod,physicalmixedmethod,andhydrothermalmethod)andcharacterizedbyX-raydiffraction(XRD),Ramanspectroscopy,Brunauer-Emmett-Teller(BET)andH2-TPRmeasurements.Potentialofthecatalystsinthesootoxidationwasevaluatedinatemperature-programmedoxidation(TPO)apparatus.TheresultsshowedthatalltheFe3+andZr4+wereincorporatedintocerialatticetoformapureCe-Fe-Zr-Osolidsolutionfortheco-precipitationsample,buttwokindsofFephasesexistedintheCe-Fe-Zr-Ocatalystspreparedbyothermethods:Fe3+incorporatedintoCeO2latticeanddispersedFe2O3clusters.ThefreeFe2O3clusterscouldimprovetheactivityofcatalystsforsootoxidationcomparingwiththepureCe-Fe-Zr-OsolidsolutionowingtothesynergeticeffectbetweenfreeFe2O3andsurfaceoxygenvacancies.Inaddition,theactivityofcatalystsstronglyreliedonthesurfacereducibilityoffreeFe2O3particles.HoldingbothabundantfreeFe2O3particlesandhighoxygenvacancyconcentration,thehydrothermalCe0.5Fe0.3Zr0.2O2catalystpresentedthelowestTi(251°C,ignitiontemperatureofsootoxidation)andTm(310°C,maximumoxidationratetemperature)forsootcombustion(withtight-contactbetweensootandcatalysts)amongthefivesamples.Evenafteragingat800°Cfor10h,theTiandTmwerestillrelativelylow,at273and361°C,respectively,indicatinghighcatalyticstability.

简介：TwonovelwashcoatsCe0.8Zr0.15La0.05OδandCe0.8Zr0.2O2waspreparedbyanimpregnationmethod,whichactedasahostfortheactivePdcomponenttopreparePd/Ce0.8Zr0.15La0.05Oδ/substrateandPd/Ce0.8Zr0.2O2/substratemonolithiccatalystsfortoluenecombustion.ThewashcoatswascharacterizedbyX-raydiffraction(XRD),Ramanspectroscopy,Brunauner-Emmett-Teller(BET),andH2-temperature-programmedreduction(H2-TPR).Theresultindicatedthatboththewashcoatshadstrongvibration-shockresistanceaccordingtoultrasonictest.DopingLa3+intoCeO2-ZrO2solidsolutioncouldgeneratemoreoxygenvacancies,andcouldinhibitthesinterofCeO2-ZrO2solidsolutionwhencalcinedathightemperatures(800,900and1000°C).ThewashcoatCe0.8Zr0.15La0.05Oδhadmuchbetterredoxproperties.ThereductivetemperatureofCe4+speciesshiftedtolowtemperatureby60°Cwhenthewashcoatscalcinedathightemperatures(800,900and1000°C).ThePd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystcalcinationat500°Chadthebestcatalyticactivityandthe95%tolueneconversionatatemperatureaslowas190°C.Whencalcinedatlowtemperature(500and700°C),thecatalyticactivityhaslittleimprovement,however,whencalcinedathightemperature,thecatalyticactivityofPd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystshadsignificantimprovement.Ascatalystwashcoat,theCe0.8Zr0.15La0.05OδhadbetterthermalstabilitythanthewashcoatCe0.8Zr0.2O2,thedevelopedPd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystinthisworkwaspromisingforeliminatingVolatileorganiccompounds.

简介：LongafterglowphotoluminescentmaterialsSr2MgSi2O7dopedwithEu2+,Dy3+werepreparedbysol-gelmethod.ThesynthesizedsampleswerecharacterizedbyX-raydiffraction.Theexcitationspectrum,emissionspectrumandlongdecaycurveweremeasuredandanalyzed.XRDpatternindicatesthatphosphoriswithSr2MgSi2O7crystalstructure.Thewiderangeofexcitationwavelengthindicatesthatluminescentmaterialcanbeexcitedbylightfromultravioletraytovisiblelight.Themainpeakofemissionspectrumislocatedat466nm.Sampleexcitedbyvisiblelightcanemitbrightbluelight,andtheafterglowtimelastsmorethan8h.

简介：Cr的Nanopowder:Cr的GGG和nanopowder，Nd:有从0.1at.%到1.5at.%的Cr3+的不同集中的GGG被大音阶的第五音胶化方法用醋酸和乙烯乙二醇综合。热gravimetric分析和微分扫描热量测定(TGA-DSC)，X光检查衍射(XRD)和光致发光光谱学被用来描绘粉末。当在1000点对待时，雏晶尺寸是大约58nm?????????????????猯灵?匠?猼'T资???猼灵?????????猯'T??猼灵????￣?????猯'T????猯灵??猼'T?????吗????????????????‵渠????????浮？？

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简介：缩放Nano的氧化钇粒子基于含水的钇硝酸盐和乙二醇经由非水的sol-gelprocess被综合。到雏晶上的钇离子和锻烧温度的乙二醇的臼齿的比率的效果产品缩放我们再学习。为铵perehlorate(AP)的同样准备的氧化钇的催化表演分解被微分扫描调查热量测定(DSC)。结果显示有在平均雏晶尺寸的不到20nm的缩放nano的立方的氧化钇粒子能在70degC在2h倒流以后被获得，在90degC弄干，形成xerogel，并且由为2hxerogel退火列在后面，并且到AP的缩放nano的氧化钇的增加在温度合并AP的二座小发热的山峰，这310~变化350degC并且400-470degC进AP和增加的一座强壮的发热的山峰从515的明显的分解热到超过1110Jcentre点g~(-1)。发热的山峰减少和明显的分解AP加热的AP分解的温度随数量的增加增加缩放ofnano的氧化钇，也是清楚的。到AP的5%缩放nano的氧化钇的增加减少的事实到由114.6degC的减小的337.7degC的AP发热的山峰的温度，并且从515～1240J中心点g~增加明显的分解热(-1),揭示那缩放nano的氧化钇hows为AP的强壮的催化性质热分解。