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简介：ThecharacteristicsofradiationanddryingpropertiesofTiO2bulbinthefixedbedwithinfraredradiationhavebeenstudiedinthispaper,andtheexperimentsondryingdynamicshasbeenanalysedalso.Theoptimizationofheatandmasstransferdatahasbeendetermined,whichcouldprovidethescientificbasisengineeringdesign.

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简介：用常压气相沉积法镀膜制得的二氧化钛薄膜为催化剂，以紫外灯为光源，研究了亚甲基蓝的光催化降解。实验表明：镀膜时基片温度为２００℃；用铜线作为底物，在染料溶液中加Ｈ２Ｏ２，可提高光催化活性。更多还原

简介：以钛酸四丁酯为前驱体，采用溶胶一凝胶一超声波法制备得到了纳米TiO2溶胶，在单面抛光的硅片上采用旋转涂膜法涂上TiO2溶胶，快速烘干，再经烧结得到TiO2薄膜，并利用XRD，XPS与AFM对其结构性能进行表征，结果表明，膜厚度大约可控在3-5nm，膜表面颗粒大小约20nM，膜的组成主要为锐钛矿型TiO2和少量有机碳化物。在制备TiO2薄膜时，发现膜层随着镀膜次数变化显示不同的颜色差异，并有着良好的对应关系。以此现象入手研究不同颜色的TiO2薄膜在同一光催化条件下甲醛的降解分析，实验结果发现呈蓝色光的TiO2薄膜表现良好的光催化效果，其原因可能是蓝色光对光的吸收较好。

简介：Hydrogen,thecleanestandmostpromisingenergyvector,canbeproducedbysolarintochemicalenergyconversion,eitherbythephotocatalyticdirectsplittingofwaterintoH2andO2,or,moreefficiently,inthepresenceofsacrificialreagents,e.g.,intheso-calledphotoreformingoforganics.Efficientphotocatalyticmaterialsshouldnotonlybeabletoexploitsolarradiationtoproduceelectron–holepairs,butalsoensureenoughchargeseparationtoallowelectrontransferreactions,leadingtosolarenergydriventhermodynamicallyup-hillprocesses.RecentachievementsofourresearchgroupinthedevelopmentandtestingofinnovativeTiO2-basedphotocatalyticmaterialsarepresentedhere,togetherwithanoverviewonthemechanisticaspectsofwaterphotosplittingandphotoreformingoforganics.Photocatalyticmaterialswereeither（i）obtainedbysurfacemodificationofcommercialphotocatalysts,orproduced（ii）inpowderformbydifferenttechniques,includingtraditionalsolgelsynthesis,aimingatengineeringtheirelectronicstructure,andflamespraypyrolysisstartingfromorganicsolutionsoftheprecursors,or（iii）inintegratedform,toproducephotoelectrodeswithindevices,byradiofrequencymagnetronsputteringorbyelectrochemicalgrowthofnanotubearchitectures,orphotocatalyticmembranes,bysupersonicclusterbeamdeposition.

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简介：测量了ZnO-TiO2-Bi2O3-CuO-Co2O3,ZnO-TiO2-Bi2O3-CuO-Cr2O3,ZnO-TiO2-Bi2O3-CuO-MnO2和ZnOTiO2-Bi2O3-CuO-MnO2-Co2O3-Cr2O3压敏陶瓷的正电子寿命谱及其电性能参数。研究了MnO2、Co2O3和Cr2O3掺杂对ZnO-TiO2-Bi2O3-CuO压敏陶瓷电子密度和电性能的影响。实验发现：ZnO-TiO2-Bi2O3-CuOCr2O3压敏陶瓷基体和晶界缺陷态的电子密度均最高,其压敏电压最低;ZnO-TiO2-Bi2O3-CuO-MnO2压敏陶瓷晶界缺陷态的电子密度最低,其压敏电压比前者高;ZnO-TiO2-Bi2O3-CuO-Co2O3压敏陶瓷基体（晶粒内）的电子密度最低,其压敏电压较高;而ZnO-TiO2-Bi2O3-CuO-MnO2-Co2O3-Cr2O3压敏陶瓷基体和晶界缺陷态的电子密度均较低,其压敏电压VT和非线性系数ɑ最高,漏电流IL最小。

简介：Formicacidphotodegradationisoneofthemostimportantreactionsinorganicpollutioncontrol,andhelpstoimprovethehydrogengenerationefficiencyintitaniumdioxidecatalyzedwaterphotodecomposition.BasedondensityfunctionaltheoryandReaxFFmoleculardynamics,theadsorption,diffusionandactivationofformicacidonthedifferentanataseTiO2（101）,（001）,（010）surfacesareinvestigated.TheresultshowsthattheadsorptionofCOOHonanataseTiO2surfaceshrinkstheenergygapbetweenthedehydrogenationintermediateCOOHandHCOO.OntheanataseTiO2（101）surface,theformicacidbreakstheO–Hbondatthefirststepwithactivationenergy0.24eV,andtheconsequentbreakofα-Hbecomemucheasierwithactivationenergy0.77eV.Thedissociationofα-HisthedeterminationstepoftheHCOOHdecomposition.

简介：WehaveexploitedagreenapproachtopreparelayeredtitanateNa2-xHxTi2O5·H2OnanosheetarraysonFTOsubstratebyhydrothermalhydrolysisoftitanium(IV)isopropoxide(TTIP)withaidsofNa2EDTAandTEOAasco-coordinationagents,whichwerethentreatedbyHNO3toreplaceNa+byH+,followedbyacalcinationat450℃totopotacticallytransformintoanataseTiO2nanosheetarrays.SEM,TEM,XRD,andRamanspectroscopyhavebeenemployedtocharacterizethenanosheetfilms.TheTiO2nanosheetarrayswerefurtherappliedaselectrontransportmaterialsofCH3NH3PbI3perovskitesolarcells,achievingpowerconversionefficiencyof6.99%.

简介：Thispaperreportsthatsingle-layerandgradedAu-TiO2granularcompositefilmswithAuatomcontent15%-66%werepreparedbyusingreactiveco-sputteringtechnique.Thethird-orderopticalnonlinearityofsingle-layerandgradedcompositefilmswasinvestigatedbyusingsandp-polarizedZ-scansinfemtosecondtimescale.Thenonlinearabsorptioncoefficientβeffofsingle-layerAu-TiO2filmsismeasuredtobe-2.3×1030.76×103cm/GWwithAuatomcontent15%-66%.Theβeffvalueofthe10-layerAu-TiO2gradedfilmisenhancedtobe-2.1×104cm/GWcalculatedfromp-polarizedZ-scans,whichisabouttentimesthemaximumβeffofsingle-layerfilms.Broadenedresponseinthewavelengthregion730-860nmoftheenhancedopticalnonlinearityofgradedAu-TiO2compositefilmswasalsoinvestigated.

简介：用流动反应器、ＸＲＤ、ＩＲ和ＤＴＡ等方法对杂多化合物的组成和结构以及在异丁烯部分氧化中的催化行为进行了研究，发现在ＰＭＯ１２Ａｓ０.６Ｃｕ０.１Ｏｘ中加进适量的Ｋ和Ｖ得到的杂多化合物在异丁烯一步氧化为甲基丙烯酸的过程中显示出良好的催化性能。通过调变催化剂的组成和优化反应条件，甲基丙烯酸和甲基丙烯醛总收率达６７％。Ｖ和Ｋ加入到母体磷铝酸（ＰＭＯ１２）中增强了热稳定性，和母体相比催化剂的分解温度提高了２００℃。

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简介：ThehighlyorderedTiO2nanotubes（NTs）werefabricatedbytheanodicoxidationmethod.Theirmorphology,structureandcrystallinephasewerecharacterizedbyscanningelectronmicroscopy（SEM）andX-raydiffractometer（XRD）.Theeffectsofmorphology,specificsurfacearea,porestructuresandphotocatalyticactivityoftheTiO2NTswereinvestigated.UV–visspectraanalysisshowedthatitslightabsorptionhadbeenextendedtothevisiblelightrange.Thephotocatalyticactivityoftheas-preparedsampleswasevaluatedbyphotocatalyticoxidationofgaseousHCHOandMBaqueoussolution.Thesampleshadbetteradhesionstrengthinthedarkandshowedahigherphotocatalyticactivitythannanoparticles.Especially,withultravioletlightpretreatment,thenanotubesexhibitedmorestableactiveforphotocatalyticdecompositionandthephotodecompositionrateremainedathighlevelafter3cyclesofthephotocatalysisexperiment.Thus,howthenumberofsurfaceactivegroup·OHincreasedandthemechanismforthegreatimprovementforthephotocatalyticactivityarediscussed.

简介：Photocatalyticwatersplittingandcarbondioxidereductionprovideuscleanandsustainableenergyresources.Thecarbondioxidereductionisalsotheredemptionofthegreenhouseeffect.MoS3/TiO2photocatalystsbasedonTiO2nanoplateshavebeensynthesizedviaahydrothermalacidificationrouteforwaterandcarbondioxidereductionreactions.ThisfacileapproachgenerateswelldispersedMoS3withlowcrystallinityonthesurfaceofTiO2nanoplates.Theas-synthesizedMoS3/TiO2photocatalystshowedconsiderableactivityforbothwaterreductionandcarbondioxidereduction.ThethermaltreatmenteffectsofTiO2,theloadingpercentageofMoS3andthecrystallinephaseofTiO2havebeeninvestigatedtowardsthephotocatalyticperformance.TiO2nanoplatesynthesizedthroughhydrothermalreactionwiththepresenceofHFacidisanidealsemiconductormaterialfortheloadingofMoS3forphotocatalyticwaterandcarbondioxidereductionsimultaneouslyinEDTAsacrificialsolution.

简介：Nickelhydroxidewasusedasthepositiveelectrodematerialinrechargeablealkalinebatteries,whichplaysasignificantroleinthefieldofelectricenergystoragedevices.β-nickelhydroxide(β-Ni(OH)_2)waspreparedfromnickelsulphatesolutionusingpotassiumhydroxideasaprecipitatingagent.Pureβ-phaseofnickelhydroxidewasconfirmedfromXRDandFT-IRstudies.TheeffectsofTiO_2additiveontheβ-Ni(OH)_2electrodeperformanceareexamined.ThestructureandpropertyoftheTiO_2addedβ-Ni(OH)_2werecharacterizedbyXRD,TG-DTAandSEManalysis.Apasted–typeelectrodeispreparedusingnickelhydroxidepowderasthemainactivematerialonanickelsheetasacurrentcollector.Cyclicvoltammetryandelectrochemicalimpedancespectroscopystudieswereperformedtoevaluatetheelectrochemicalperformanceoftheβ-Ni(OH)_2andTiO_2addedβ-Ni(OH)_2electrodesin6MKOHelectrolyte.Anodic(Epa)andcathodic(Epc)peakpotentialsarefoundtodecreaseaftertheadditionofTiO2intoβ-Ni(OH)_2electrodematerial.Further,additionofTiO_2isfoundtoenhancethereversibilityoftheelectrodereactionandalsoincreasetheseparationoftheoxidationcurrentpeakoftheactivematerialfromtheoxygenevolutioncurrent.Comparedwithpureβ-Ni(OH)_2lectrode,TiO_2addedβ-Ni(OH)_2electrodeisfoundtoexhibithigherprotondiffusioncoefficient(D)andlowerchargetransferresistance.ThesefindingssuggestthattheTiO_2addedβ-Ni(OH)_2electrodepossessimprovedelectrochemicalpropertiesandthuscanberecognizedasapromisingcandidateforthebatteryelectrodeapplications.

简介：ThispaperstudiesthelightscatteringandadsorptionofnanocrystallineTiO2porousfilmsusedindye-sensitizedsolarcellscomposedofanataseand/orrutileparticlesbyusinganopticalfour-fluxradiativetransfermodel.Theselightpropertiesarediffculttomeasuredirectlyonthefunctioningsolarcellsandtheycannotbecalculatedeasilyfromthefirst-principlecomputationalorquantitativetheoreticalevaluations.Thesesimulationresultsindicatethatthelightscatteringof1-25nmTiO2particlesisnegligible,butitiseffectiveintherangeof80and180nm.Asuitablemixtureofsmallparticles(10nmradius),whichareresultedinalargeeffectivesurface,andoflargerparticles(150nmradius),whichareeffectivelightscatterers,havethepotentialtoenhancesolarabsorptionsignificantly.Therutilecrystalshavealargerrefractiveindexandthusthelightharvestofthemixturesofsuchlargerrutileandrelativelysmallanataseparticlesisimprovedincomparisonwiththatofpureanatasefilms.Thelightabsorptionofthe10μmdouble-layeredfilmsisalsoexamined.Amaximallightabsorptionofdouble-layeredfilmisgottenwhenthethicknessofthefirstlayerof10nm-sizedanataseparticlesiscomparabletothatofthesecondlargerrutilelayer.

简介：利用ＣＯ２程序升温脱附测定了三种氧化铝基催化剂上的表面碱性。结果表明，三种催化剂上表面碱性的类型、强度和数目分布不同。活性氧化铝上负载Ｋ２Ｏ和Ｐｔ可大大改变催化剂表面碱性分布。三种催化剂上弱碱性中心的ＣＯ２脱附表现活化能分别为２５．９７，２７．９２和２９．７７ｋＪ／ｍｏｌ。弱碱性中心是ＣＯＳ水解催化活性中心，而弱的和较强的碱性中心参与ＣＳ２的水解催化反应。更多还原