简介：分散硅石的NiMohydrodesulfurization催化剂被免职降水方法综合。为比较目的，体积NiMo催化剂被一起沉淀获得。分散硅石的NiMo催化剂有高度活跃的金属内容。硅石被采用为活跃部件的完整的利用驱散活跃金属。赌注分析证明分散硅石的NiMo催化剂有一个高表面区域(147.0m2/g)和毛孔体积(0.27mL/g)，而体积NiMo催化剂展出了一个很低的表面区域(87.5m2/g)。传播电子显微镜学结果证明活跃部件在SiO2底层上被驱散。分散硅石的NiMo催化剂和体积NiMo催化剂的X光检查衍射模式被索引到NiMoO4。分散硅石的NiMo催化剂的hydrodesulfurization活动比引用催化剂的高得多并且能直到比那些两次大商业NiMo支持氧化铝的系统每催化剂的克。测试结果的活动也证明分散硅石的NiMo催化剂是有效hydrodesulfurization催化剂。

简介：Dispersedfringesensor(DFS)isanimportantphasingsensorofnext-generationopticalastronomicaltelescopes.ThemeasurementerrorsinducedbythemeasurementnoiseofthreepistonestimationmethodsfortheDFSincludingleastsquaredfitting(LSF)method,frequencypeaklocation(FPL)methodandmainpeakposition(MPP)method,areanalyzedtheoreticallyandvalidatedexperimentallyinthispaper.Theexperimentalresultscoincidewellwiththetheoreticalanalyses.TheMPP,FPL,LSFareusedrespectivelywhentheDFSoperateswithbroadbandlight(centralwavelength:706nm,bandwidth:23nm).Thecorrespondingrootmeansquare(RMS)valueofestimatedpistonerrorcanbeachievedtobe1nm,3nm,26nm,respectively.Additionally,therangeofDFSwiththeFPLcanbemorethan100μmatthesametime.TheFPLmethodcanworkwellbothincoarseandfinephasingstageswithacceptableaccuracy,comparedwithLSFmethodandMPPmethod.

简介：Theslurry-bedhydrocrackingofKaramayVGOwithwater-solubledispersedcatalystwasstudiedandthecatalystafterbeingseparatedfromthereactionproductswasanalyzedbyusingLRS,XRDandXPStoidentifythecrystalstructureofthecatalyst.Inthispaper,thecatalyticfunctionsofmolybdenum,nickelandironwerestudiedrespectivelyduringtheslurry-phasehydrocrackingwhileusingdiphenylmethaneasthemodelcompoundandVGOfromKaramaycrudeasthefeedstock.Thetestresultsshowedthat,duringtheslurry-phasehydrocrackingofheavyoil,themetalsulfidesenteredintochemicalreactionswiththefreeradicalintermediateH·formedonthecatalystsurface.Thefree-radicalintermediateH·formedonthecatalystsurfacecouldreactwiththefree-radicalsofbigmoleculesandcouldsuppresscokedeposition.

简介：Researchonparticulatecharacteristicshasbeenanimportantfrontierinphysicsandchemistryduringthepastdecades.Ithashoweverbeenmostlyfocusedongranularmaterialswithshort-rangeinteractions.Inthiswork,itwasfoundthatthepowerlawofparticlesizedistributionappliedtothelong-rangeinteractingsystemoffloatingdustinair,fromwhichwededucedthatself-organizedcriticalitymightholdforfloatingdustjustasgranularmaterialswithshort-rangeinteractions.Thisfeaturemayrevealunderlyingkineticmechanisms,importantindispersedparticlesystems.Inindustry,powerlawofsizedistributionofdispersedparticlescanbeusedtoinvestigatethechangeofdustsize,andthepowerlawparametercouldbetakenasanimportantindexfordustseparation.

简介：Fourkindsofpalladiumcatalystsdispersedonpoly-N-vinyl-2-pyrrolidonewerepreparedbyusingCH3OH-NaOH,NaBH4,H2OorCH3OH-H2Oasthereducingagentintheprocessofcatalystpreparation.ThecatalystswerecharacterizedbyXPS,TEM,XRDandusedforthehydrogenationofmethylacrylate.Itwasfoundthatthevalencestateofpalladiumanddistributionofpalladiumparticlesaswellasthehydrogenationrateweregreatlyaffectedbythereducingagent.ThebestevenlydispersedpalladiumcatalystshowinghighhydrogenationactivitywaspreparedusingCH3OH-NaOHasthereducingagent.

简介：Theconformationofpolymersatthesolid-liquidinterfacehasbeenthesubjectofconsiderableinterestinthefundamentaltheoryandappliedpractice.Inpaintsandprintinginks,dispersionsofpigmentorfillerpowdersinpolymericbindersolutionshavetobemaintainedinthecolloidalstate.Oneofthestabilizingmechanismsforpaintisthestericstabilization.Ontheotherhand,intheformationreactionofpolymeratthesolid-liquidinterfacetookplacebetweenmonomersolutionsandsolid

简介：克莱矿物质能在土壤和含水土层妨碍各种各样的沾染物的运输，但是泥土矿物质怎么在含水土层影响nanoparticles的运输，没深入地被调查。在这份报纸，表面活化剂的运输在明确的石英沙驱散多围的碳nanotubes(MWCNT)，有改变离子的力量的石英沙和泥土矿物质(kaolinite和montmorillonite)的混合物被学习。钠dodecylbenzenesulfonate(SDBS)和MWCNT暂停能容易通过石英沙移植的octyl-phenol-ethoxylate(TX100)，而是在石英沙罐头的不到2%w/w泥土矿物质的存在显著地妨碍MWCNT暂停的运输，特别在高离子力量(0.6公里CaCl2)。为在多孔的媒介的分散表面活化剂的MWCNT的泥土矿物质的抑制机制是MWCNT的拦截。因为更多的kaolinite能在石英沙被保留，Kaolinite比montmorillonite为MWCNT运输有更强壮的抑制效果。由泥土矿物质的表面活化剂的吸附不显著地影响MWCNT的运输。这发现为对在土壤和含水土层的MWCNT运输风险的环境评价是重要的。

简介：Well-dispersedBaSO4nanoparticlesweresynthesizedinthepresenceofsodiumpolyacrylate（PAAS）byasimpleprecipitationmethod,withBaCl2and（NH4）2SO4asreactants.ThedifferentrolesperformedbyPAASinthesynthesisofBaSO4nanoparticleswereinvestigatedusingX-raydiffractometry,Fouriertransforminfraredspectroscopy,andtransmissionelectronmicroscopy.TheresultsindicatethattheassynthesizedBaSO4nanoparticlesweresphereswithanaveragediameterof30nmandthattheirsurfaceswereaffectedbythePAAS.Underatypicalprocedureemployed,PAASreactedwithBaCl2toyieldanintermediate,servingasacontrolreleasingagentandseparatingthenucleationandcrystalgrowthprocessesoftheBaSO4nuclei.DuringformationoftheBaSO4nanospheres,theintermediateslowlydissolvedandreleasedbariumandpolyacrylateions,inhibitingthegrowthandaggregationofnewlyformedBaSO4seedsandresultinginparticlesofnarrowdiameterdistributionandimproveddispersibility.Moreover,thesepolyacrylateionsfurthermodifiedthesurfacesoftheBaSO4nanoparticles.

简介：Variousenolsof2-acylmethyl-4,4-dimethyl-2-oxazolineswerepreparedinmoderateyieldsviaultrasonicallycatalyzedreactionsof2,4,4-trimethyl-2-oxazolinewitharenecarboxylicestersinthepresenceofUDP-t-BuCl-i-Pr2NHsystem.

简介：Nanostructuredtransitionmetaloxidesarepromisingalternativeanodesforlithiumionbatteries.Li-ionstorageperformanceisexpectedtoimproveifhighpackingdensityenergyparticlesareavailable.Herein,Mn2O3microsphereswithaca.18μmdiameterandatappeddensityof1.33g/cm3weresynthesizedbyafacilesolvothermal-thermalcoversionroute.SphericalMnCO3precursorswereobtainedthroughsolvothermaltreatmentandtheydecomposedandconvertedintoMn2O3microspheresatanannealingtemperatureof700C.TheMn2O3microspheresconsistedofMn2O3nanoparticleswithanaverage40nmdiameter.TheseporousMn2O3microspheresallowgoodelectrolytepenetrationandprovideanionbufferreservoirtoensureaconstantelectrolytesupply.TheMn2O3microsphereshavereversiblecapacitiesof590and320mAh/gat50and400mA/g,respectively.Wethusreportanefficientrouteforthefabricationofenergyparticlesforadvancedenergystorage.

简介：polypropylene/ethylene-propylene随机copolymer/ethylene-propylene的一系列第三的混合分割了其微观结构类似于影响聚丙烯共聚物(欧洲电脑生产厂商)的那些的共聚物(HPP/EPR/EbP)被准备以便系统地在微观结构和欧洲电脑生产厂商的结晶化行为上调查作文的效果。主要阶段形态学的观察表明有核心壳结构的驱散的阶段能在某些作文被重建，过多的EPR在第三的混合导致bicontinuous阶段结构。在包括等温、非等温的结晶化经历一样的静止结晶化以后，这些混合样品展出融化行为的特殊作文依赖者，即，融化的点随EPR内容的增加显著地增加直到它在一个批评内容(大约30wt%)拒绝。结晶化行为主要被归功于到不同成核能力。尽管在EPR和HPP部件之间的相容性随EPR的增加变得更坏，由于增加的界面的区域和EbP的减少的集中满足，这被建议，在混合的更高的EPR内容除了明显的bicontinuous的外观便于到异构的成核阶段结构。

简介：这学习介绍鸡蛋壳的使用利用手掌的废物基于的核壳通过他们的表面的修正激活碳(PKSAC)到提高H的吸附能力2S。反应表面方法论技术被用来优化过程条件，他们被发现是：为H2S起始的集中，在接触时间的540min和为吸附物的1g集中。三安排的影响H2S移动效率和使妊娠的交流产量被调查。两回答IAC收益(IACY，%)并且移动效率(RE，%)被最大化优化IAC准备条件。为IACY和RE的最佳准备条件如下被发现：880的IAC的锻烧温度???ì