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：提出了一种可用于微秒脉冲电压下的2MV电容耦合自触发开关模式，该开关具有结构简单、高可靠性等特点。通过电场分布计算及电路计算得到开关关键绝缘参数和电路参数。计算结果表明，设计触发间隙电压为主间隙电压的1.21%，该开关主间隙场不均匀系数为1.64,开关在0.7MPa的SF,;气体中工作电压为2.27MV。

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：利用密度泛函理论（DensityFunctionalTheory）中的B3LYP方法在6-311＋G（d,p）的计算水平上研究了Fe/Fe_2与NO反应的相关微观机理.全参数优化了Fe＋NO和Fe_2＋NO反应体系在不同重态反应势能面上各驻点的几何结构,并用频率分析法以及内禀反应坐标（IntrinsicReactionCoordinate）方法对过渡态进行了验证,得到了相对应的反应的微观反应路径.用＂两态反应＂分析反应机理,计算结果表明2个体系的优先选择路径均为低自旋态进入和高自旋态离开反应.通过对2个体系反应活化能的比较,Fe_2＋NO体系更易进行.

简介：PtRu/SnO2/Ccatalystwaspreparedinapolyolprocess,followedbyreductiontreatmentandalkalineetching.X-raydiffraction,transmissionelectronmicroscopewithenergydispersivespectrometerandXrayphotoelectronspectroscopywereusedtocharacterizethemorphology,structureandcompositionofthecatalysts.COandmethanolelectro-oxidationactivitiesofthecatalystswereevaluatedbyCOstrippingvoltammetry,cyclicvoltammetryandchronoamperometrymeasurements.ReductiontreatmentofthepreparedPtRuSnO2/CcatalystinapolyolprocessinducedtheenrichmentofSnonthesurface,inhibitingmethanoldissolutionandCOadsorptiononPt.AlkalineetchingremovedSnorSnOxandthusexposedPtRuonthesurface,resultinginenhancedactivitiesforCOandmethanolelectro-oxidationduetothesynergyeffectsofPtRuonthesurfaceandSnspeciesbeneath.

简介：

简介：ThegatedielectricthicknessdecreasesdramaticallywiththecontinuousscalingofMOSdevices,whichhasseriousconsequencesontheleakagecurrentandthepowerconsumptionoftheSiO2-basedMOSdevices.Hafniumdioxide(HfO2),asakindofhigh-kmaterial,arerecognizedasalternativestoSiO2forfutureadvancedgatedevicesandspaceapplications[1].Radiation-inducedeffectsonconventionalSiO2dielectricshavebeeninvestigated.Now,anenormousamountofeffortwasrequiredtoadaptthenewhigh-ksystemsforradiationhardapplication.

简介：最近，大努力在任意的弄歪的设备的制造被作了满足便携、小的电子产品的要求。当它是一个很挑战性的工作时，灵活底层上的高水晶的优秀电影的直接生长是最理想的方法与当前的半导体设备由于简单、兼容的准备技术的优点制作灵活设备，并且通常非结晶、多晶或不连续的单个水晶的电影被完成。这里，我们表明高质量的双性人2Te3单身者由修改的热墙取向附生技术的灵活polyimide底层上的水晶的电影。试验性的结果表明邻近的雏晶协调地被联合形成一部连续电影，尽管迷惑的雏晶的数量由于快生长率被产生。由把一个石英过滤器插入到生长试管，迷惑的雏晶的数字密度有效地由于改进螺线相互作用被减少。而且，灵活双性人2Te3光电导体被制作并且在弯曲的不同的度下面展出强壮的在红外线附近的光导的反应，它也证实对电子应用合适的获得的灵活电影。

简介：Inthispaper,themodifiedextendedtanhmethodisusedtoconstructmoregeneralexactsolutionsofa(2+1)-dimensionalnonlinearSchr¨odingerequation.WiththeaidofMapleandMatlabsoftware,weobtainexactexplicitkinkwavesolutions,peakonwavesolutions,periodicwavesolutionsandtheir3Dimages.

简介：TheeffectsofTiO2onsinteringandnonlinearelectricalpropertiesof（98.5-x）ZnO–0.5MnO2–0.5Co2O3-0.5Bi2O3–xTiO2（x=0.3,0.5,0.7,0.9mol%）ceramicvaristorspreparedbytheceramictechniqueareinvestigatedinthiswork.Theoptimumsinteringtemperatureofthepreparedsamplesisdeducedbydeterminingthefiringshrinkageandwaterabsorptionpercentages.Theoptimumsinteringtemperatureisfoundtobe1200℃,atwhicheachofthesamplesshowsamaximumfiringshrinkageandminimumwaterabsorption.Alsominimumwaterabsorptionappearsinasampleofx=0.9mol%.HighersinteringtemperatureandlongersinteringtimegiverisetoareductioninbulkdensityduetotheincreasedamountofporositybetweenthelargegrainsofZnOresultingfromtherapidgraingrowthinducedbytheliquidphasesintering.ThecrystalsizeofZnOdecreaseswithincreasingTiO2doping.TheadditionofTiO2improvesthenonlinearcoefficientandattainsitsmaximumvalueatx=0.7mol%ofTiO2,furtheradditionnegativelyaffectsit.Adecreaseincapacitanceconsequentlyinthedielectricconstantisrecordedwithincreasingthefrequencyinarangeof30kHz–200kHz.ThetemperatureandcompositiondependencesofthedielectricconstantandACconductivityarealsostudied.Theincreaseoftemperatureraisesthedielectricconstantbecauseitincreasesionicresponsetothefieldatanyparticularfrequency.

简介：PhotoelectrochemicalandelectrochemicalreductionofCO2intoorganicchemicalsispromisingfordirectlyorindirectlytransformingsolarenergyintochemicalenergyforfurtherutilization.However,researchontheelectroactivespeciesintheseprocesseshasbeenratherlimited.Inthiswork,weinvestigatedpossibleelectroactivespecies（CO2orHCO3–）involvedintheelectrochemicalreductionofKHCO3atelevatedtemperatureswithoutCO2bubbling.TheresultsshowedthatCO,CH4,andC2H4wereproducedafterelectrochemicalreductionof3.0mol/LKHCO3atelevatedtemperatureonaCuelectrodeevenwithoutCO2bubbling,althoughtheirfaradaicefficiencieswerelow（<6%）.MeasurementsforCO2generationfromthedecompositionofHCO3–showedthatelevatedtemperatureandhighHCO3–concentrationstronglypromotedthisprocess.Theseresultssuggestedthatthein-situproducedCO2fromthedecompositionofHCO3–wasprobablytheelectroactivespeciesintheelectrochemicalreductionofHCO3–withoutCO2bubbling.ChangesoftheGibbsfreeenergy,rateconstant,andactivationenergyofthedecompositionofHCO3–intoCO2werealsoinvestigatedandcalculatedfromtheexperimentaldata.

简介：penta醚混合物被di(trimethylolpropane)的反应作为烷基卤化物作为强壮的底和甲基碘化物与钠氢化物综合。这混合物被NMR，FTIR，和GC技术描绘。MgCl2-supported钛催化剂与作为内部施主改变penta醚化合物的数量被合并，也，没有内部施主的催化剂被综合。综合催化剂和常规Ziegler-Natta催化剂被描绘。钛内容被spectrophotometry决定，由由argentometric滴定的complexometric滴定和氯化物的镁。有准备MgCl2-supportedZiegler-Natta催化剂的丙烯聚合上的新内部施主的效果被调查然后这些结果与用常规diisobutylphthalate-besed-Ziegler-Natta催化剂获得的结果相比。聚丙烯的最高的crystallinity度，融化的温度，和isotacticity与penta-ether/Mg用催化剂被获得臼齿的比率平等者到0.21。

简介：ThisworkismainlytostudytheeffectofheavyionirradiationonthedamageofsinglelayerMoS2.ThenumberoflayersofMoS2preparedbyCVD(chemicalvapordeposition)methodwasdeterminedbyopticalmicroscopyandRamanspectroscopy.ThemonolayerMoS2preparedbyCVDunderhighenergy209BiionirradiationwasanalyzedbyRamananalysisandAFMobservation.AndtheresultsarecomparedandanalyzedbeforeandafterthebeamirradiationofsinglelayerMoS2preparedbymechanicalstrippingmethod.

简介：MacroscopicSiO_2sphereswithahomogeneousaminedistributionweresynthesizedbyaone-stepemulsionbasedsynthesisapproachinaflowcolumnreactor.TheCO_2adsorptioncapacityofthenanostructuredamine-functionalizedsilicasphereswasstudiedinabsenceandpresenceofH_2O.Thestructuralpropertieswereadjustedbyvaryingsolventsandsurfactantsduringthesynthesisand,atconstantamineloadings,werefoundtobethemainfactorforinfluencingtheCO_2sorptioncapacities.Underwater-freeconditionsCO_2isboundtotheaminogroupsviatheformationofcarbamates,whichrequiretwoneighboringaminogroupstoadsorboneCO_2molecule.Atconstantamineconcentrationssorbentswithlowersurfaceareaallowtoestablishahigheraminedensityonthesurface,whichenhancestheCO_2uptakecapacitiesunderdryconditions.InpresenceofH_2OtheCO_2adsorptionchangesto1:1stoichiometryduetostabilizationofcarbamatesbyprotonationofH_2Oandformationoffurtherspeciessuchasbicarbonates,whichshouldinprincipledoubletheadsorptioncapacities.LowconcentrationsofphysisorbedH2O(0.3mmol/g)didnotimpairtheadsorptioncapacityoftheadsorbentsforCO_2,whileathigherwateruptakes(0.6and1.1mmol/g)theCO_2uptakeisreduced,whichcouldbeattributedtocapillarycondensationofH_2Oorformationofbulkyreactionproductsblockinginnerporesandaccesstoactivesites.

简介：Toimprovetheharvestingofvisiblelightandreducetherecombinationofphotogeneratedelectronsandholes,Ti3+self-dopedTiO2nanoparticlesweresynthesizedandassembledintophotoanodeswithhighvisiblelightphotoelectrochemicalproperties.X-raydiffraction,transmissionelectronmicroscopy,X-rayphotoelectronspectra,electronresonancespectroscopyandenergydispersiveX-rayspectrawereusedtocharacterizethestructure,crystallinity,morphologyandotherpropertiesoftheobtainednanoparticles.UV–visiblediffusereflectancespectrashowedthattheTi3+self-dopedTiO2nanoparticleshadastrongabsorptionbetween400and800nm.Moreover,whenhydrothermaltreatmenttimewasprolongedto22h,theheterogeneousjunctionwasformedbetweentheanataseandrutileTiO2,wheretheanataseparticlesexposedhighlyactive{001}facets.Undervisiblelightirradiation,theTi3+self-dopedTiO2electrodeexhibitedanexcellentphotoelectrocatalyticdegradationofrhodamineB（RhB）andwatersplittingperformance.Intriguingly,byselectinganappropriatehydrothermaltime,thehighphotoconversionefficiencyof1.16%wasachieved.

简介：

简介：Inthispaper,weprovetheglobalexistenceoftheweaksolutiontotheviscousquantumNavier-Stokes-Landau-Lifshitz-Maxwellequationsintwo-dimensionforlargedata.ThemaintechniquesaretheFaedo-Galerkinapproximationandweakcompactnesstheory.

简介：RuO_2nanoparticlessupportedonmulti-walledcarbonnanotubes(CNTs)functionalizedwithoxygen(OCNTs)andnitrogen(NCNTs)wereemployedfortheoxygenevolutionreaction(OER)in0.1MKOH.Thecatalystsweresynthesizedbymetal-organicchemicalvapordepositionusingrutheniumcarbonyl(Ru_3(CO)_(12))asRuprecursor.TheobtainedRuO_2/OCNTandRuO_2/NCNTcompositeswerecharacterizedusingTEM,H_2-TPR,XRDandXPSinorderprobestructure–activitycorrelations,particularly,theeffectofthedifferentsurfacefunctionalgroupsontheelectrochemicalOERperformance.TheelectrocatalyticactivityandstabilityofthecatalystswithmeanRuO_2particlesizesof13–14nmwasevaluatedbylinearsweepvoltammetry,cyclicvoltammetry,andchronopotentiometry,showingthatthegenerationofnitrogen-containingfunctionalgroupsonCNTswasbeneficialforbothOERactivityandstability.InthepresenceofRuO_2,carboncorrosionwasfoundtobesignificantlylesssevere.

简介：借助于超几何函数，在广义非中心X2分布级数形式密度函数表达式的基础上列出了两类具体椭球等高分布下的广义非中心X2分布密度函数的精确表达，并给出了详细的证明过程；同时计算了这两类具体椭球等高分布下的广义非中心X2分布对应高阶矩的形式，作为推论验证了非中心X2分布相关的结论．