简介：在低温度(400°C)，化学蒸汽免职(CVD)被采用使共同做的ZnOnanocantilever数组(NA)像梳子。同样综合的共同做的ZnONA的磁化曲线显示above-room-temperature强磁性(ARTFM)的存在(居里温度，Tc>300K)而未做，ZnONA不做。相应铁磁性的来源机制被讨论，在哪个缺点由于强壮的绿轻排放起一个重要作用。

简介：Wesynthesizedonequaternaryammoniumpolymericionicliquids（PILs）P[VBTHEA]ClandthreeimidazoliumPILsofP[VEIm]Br,P[VEIm]BF4,P[VEIm]PF6byfree-radicalpolymerizationinsolution.ThesePILswerecharacterizedbyFT-IR,1H-NMR,13C-NMR,TGA,XRDandSEM.TheirCO2adsorptioncapacitiesweremeasuredunderdifferentpressuresandtemperaturesbyconstant-volumetechnique.ItwasobservedthatquaternaryammoniumPILsofP[VBTHEA]ClhavehigheradsorptioncapacityforCO2thanthoseimidazoliumPILs,followingP[VBTHEA]Cl>P[VEIm]PF6>P[VEIm]BF4>P[VEIm]Br,whichmaybeascribedtohigherpositivechargedensityonammoniumcationthanthatonimidazoliumcationandthusstrongerinteractionwithCO2,consistentwiththeresultsfromdual-modeadsorptionmodelthatammoniumPILshavemuchhigherCO2bulkabsorptionthanimidazoliumPILs.CO2adsorptioncapacityofP[VBTHEA]Clis9.02mg/gunder295Kand1bar,whichiscomparabletothatofsomeotherPILs,andismuchhigherthanthatofthecorrespondingILsmonomer.ThesePILshavegoodadsorptionselectivityforCO2overN2andregenerationefficiency.

简介：Thomsonscatteringimaging（TSI）isproposedandexperimentallydemonstratedtoobservethefinestructureofthelaserwakefield.ByThomsonscatteringaco-propagatinglaserpulse,weobtainc/earimagesindicatingthatthewakefieldislikeanacalephswimmingbehindthepumplaser.Thewavelengthofthewakefieldobservedatdifferentelectrondensitiesagreeswellwiththetheory.Sincenomathematicstransformationisinvolved,TSIcouldbepotentiallyusedasanonlinemonitorforfuture＇tabletop＇plasmaaccelerators.

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简介：Amine-silicacompositematerialsforpost-combustionCO2capturehaveattractedconsiderableattentionbecauseoftheirhighCO2uptakeatlowCO2concentrations,excellentCO2captureselectivityinthepresenceofmoisture,andlowerenergyrequirementsforsorbentregeneration.Thisreviewdiscussestherecentadvancesinamine-silicacompositesforCO2capture,includingadsorbentpreparationandcharacterization,CO2captureunderdryandmoistureconditionsatdifferentCO2partialpressures,sorbentregeneration,andstabilityaftermanycyclicsorption-desorptionruns.

简介：Co(II)-salenwasencapsulatedinMIL-100(Cr)metalorganicframeworkby"shipinabottle"tosynthesizeanewelectrocatalyst,Cosalen@MIL-100(Cr).ThematerialwascharacterizedbyXRD,FT-IR,UV-VisandN2-adsorption.TheCosalen@MIL-100(Cr)modifiedglassycarbonelectrodeexhibitsawell-definedreductionpeakatthepotentialof–0.21Vtowardtheoxygenreductionreaction(ORR)bycyclicvoltammetry(CV)inpH=6.84phosphatebuffer.Almost400mVpositiveshiftofpotentialatCosalen@MIL-100(Cr)modifiedelectrodeforORRcomparedwiththatatbareglassycarbon,indicatesthatCosalen@MIL-100(Cr)possessesexcellentelectrocatalyticactivity.ThetransferrednumberofelectronsforORRwasdeterminedbychronocoulometry.TheresultsuggeststhattheintroductionofCo(II)-salencomplexintoMOFincreasestheelectrocatalyticactivityviaafour-electronreductionpathway.Furthermore,thiselectrocatalystexhibitsgoodstabilityandreproducibility.

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简介：Inthisstudy,apoly(etherblockamide)(Pebax1657)compositemembraneappliedforCO2capturewaspreparedbycoatingPebax1657solutiononpolyacrylonitrile(PAN)ultrafiltrationmembrane.Ethanol/watermixturewasusedasthesolventofPebaxandtheeffectsofethanol/watermassratiosandPebaxconcentrationonthepermeationpropertiesofcompositemembranewerestudied.Toenhancethecompositemembranepermeance,thegutterlayer,madefromreactiveaminosiliconecrosslinkingwithpolydimethylsiloxane(PDMS),wasdesigned.Theinfluenceofcrosslinkingdegreeofthegutterlayeronmembraneperformancewasinvestigated.Asaresult,aPebax/aminoPDMS/PANmultilayermembranewithhexaneresistancewasdeveloped,showingCO2permeanceof350GPUandCO2/N2selectivityover50.Theblendofpolyethyleneglycoldimethylether(PEG-DME)withPebaxascoatingmaterialwasstudiedtofurtherimprovethemembraneperformance.AfterbeingcombinedwithPEG-DMEadditive,CO2permeanceofthefinalPebax-PEG-DME/amino-PDMS/PANcompositemembranereached400GPUabovewithCO2/N2selectivityover65.

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简介：TheadsorptionofCOonPtgroupmetals,asamostfundamentalelementaryreactionstep,hasbeenwidelystudiedincatalysisandelectrocatalysis.Particularly,thestructuresofCOonPt(111)havebeenextensivelyinvestigated,owingtoitsimportancetobothfundamentalandappliedcatalysis.Yet,muchlessisknownregardingCOadsorptiononaPt(111)surfacemodulatedbysupportedoxidenanostructures,whichisofmorerelevancetotechnicalcatalysis.Wethusinvestigatedthecoverage-dependentadsorptionofCOonaPt(111)surfacepartiallycoveredbyFeOxnanostructures,whichhasbeendemonstratedasaremarkablecatalystforlow-temperatureCOoxidation.Wefoundthat,duetoitsstrongchemisorption,thecoverage-dependentstructureofCOonbarePtisnotinfluencedbythepresenceofFeOx.But,oxygen-terminatedFeOxnanostructurescouldmodulatethediffusivityofCOattheirvicinity,andthusaffecttheformationoforderedCOsuperstructuresatlowtemperatures.Usingscanningtunnelingmicroscopy(STM),weinspectedthediffusivityofCO,followedthephasetransitionsofCOdomains,andresolvedthemoleculardetailsofthecoverage-dependentCOstructures.OurresultsprovideafullpictureforCOadsorptiononaPt(111)surfacemodulatedbyoxidenanostructuresandshedlightsontheinter-adsorbateinteractiononmetalsurfaces.

简介：微孔塑料是一种新型泡沫塑料，相对于传统的泡沫塑料，微孔塑料具有优异的力学性能、热稳定性以及更低的介电常数和热传导性，因而微孔塑料被认为是21世纪的新型材料。

简介：MoleculardynamicssimulationsareperformedtostudythegrowthmechanismofCH4-CO2mixedhydrateinxCO2=75%,xCO2=50%,andxCO2=25%systemsatT=250K,255Kand260K,respectively.OursimulationresultsshowthatthegrowthrateofCH4-CO2mixedhydrateincreasesastheCO2concentrationintheinitialsolutionphaseincreasesandthetemperaturedecreases.Viahydrateformation,thecompositionofCO2inhydratephaseishigherthanthatininitialsolutionphaseandtheencagingcapacityofCO2inhydratesincreaseswiththedecreaseintemperature.ByanalysisofthecageoccupancyratioofCH4moleculesandCO2moleculesinlargecagestosmallcages,wefindthatCO2moleculesarepreferablyencagedintothelargecagesofthehydratecrystalascomparedwithCH4molecules.Interestingly,CH4moleculesandCO2moleculesfrequentlyreplacewitheachotherinsomeparticularcagesitesadjacenttohydrate/solutioninterfaceduringthecrystalgrowthprocess.Thesetwospeciesofguestmoleculeseventuallyacttostabilizethenewlyformedhydrates,withCO2moleculesoccupyinglargecagesandCH4moleculesoccupyingsmallcagesinhydrate.

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简介：Wereportedabifunctionalmaterial,Cr-salenimplantedconjugatedmicroporouspolymer(Cr-CMP),whichisabletocaptureexcellentCO2amountsandhasaremarkablecatalyticactivitytowardsthecycloadditionreactionofCO2toepoxidesformingcycliccarbonatesatmildconditionswithoutadditionalsolvents.ThisheterogeneousCr-CMPcatalysthasasuperiorcatalyticactivitytoitsrelatedhomogeneouscatalystandcanbereusedmorethantentimeswithoutasignificantdecreaseincatalyticactivity.

简介：TheeffectofthecoadsorptionofCOandO2ontheZiff-Gulari-BarshadsurfacecatalyticreactionsysteminstudiedbyMonteCarlosimulation.ThecoadsorptionofbothspeciesaddsanextrareactionsteptotheclassicalZiff-Gulari-Barshadmodel.Itisshownthatthesecond-orderphasetransitionfromthereactivestatetotheO-passivatedstateintheZiff-Gulari-Barshadmodeliseliminated,andtheproductionrateofCO2increaseslinearlyalongthefractionycoofCOingasphasewhenitislow,inagreementwithexperimentalresults.WealsofindthattheincreaseoftheprobabilityofthecoadsorptionleadstothedecreaseofthecriticalvalueofycoofthediscontinuousphasetransitiontotheCO-passivatedstate.

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简介：Bimetalliccobalt-rutheniumnanocatalystssupportedoncarbonnanotubes(CNTs)arepreparedusingmicroemultiontechniquewithwater-to-surfactantratiosof0.5—1.5.ThenanocatalystswereextensivelycharacterizedbydifferentmethodsandtheiractivityandselectivityinFischer-Tropschsynthesis(FTS)havebeenassessedinafixed-bedmicroreactor.Thephysicochemicalpropertiesandperformanceofthenanocatalystswerecomparedwiththecatalystpreparedbyimpregnationmethod.Verynarrowparticlesizedistributionhasbeenproducedbythemicroemulsiontechniqueatrelativelyhighloadingsofactivemetals(15wt%Coand1wt%Ru).AccordingtoTEMimages,smallCoparticles(2—7nm)weremostlyconfinedinsidetheCNTs.Comparingwiththecatalystpreparedbyimpregnation,theuseofmicroemulsiontechniquewithwatertosurfactantratioof0.5decreasedtheaveragecobaltoxideparticlesizeto4.8nm,thedispersionwasalmostdoubledandthereductionincreasedby28%.Activityandselectivitywerefoundtobedependentonthecatalystpreparationmethodandwater-to-surfactantratio(aswellascobaltparticlesizes).COconversionincreasedfrom59.1%to75.1%andtheFTSrateincreasedfrom0.291to0.372gHC/(gcath).C5+liquidhydrocarbonsselectivitydecreasedfrom92.4%to87.6%.

简介：Recentadvancesontheuseofnanocarbon-basedelectrodesfortheelectrocatalyticconversionofgaseousstreamsofCO2toliquidfuelsarediscussedinthisperspectivepaper.Anovelgas-phaseelectrocatalyticcell,differentfromthetypicalelectrochemicalsystemsworkinginliquidphase,wasdeveloped.Thereareseveraladvantagestoworkingasphase,e.g.noneedtorecovertheproductsfromaliquidphaseandnoproblemsofCO2solubility,etc.Operatingundertheseconditionsandusingelectrodesbasedonmetalnanoparticlessupportedovercarbonnanotube(CNT)typematerials,longC-chainproducts(inparticularisopropanolunderoptimizedconditions,butalsohydrocarbonsuptoC8-C9)wereobtainedfromthereductionofCO2.Pt-CNTaremorestableandgiveinsomecasesahigherproductivity,butFe-CNT,particularusingN-dopedcarbonnanotubes,giveexcellentpropertiesandarepreferabletonoble-metal-basedelectrocatalystsforthelowercost.ThecontrolofthelocalizationofmetalparticlesattheinneroroutersurfaceofCNTisanimportactfactorfortheproductdistribution.ThenatureofthenanocarbonsubstratealsoplaysarelevantroleinenhancingtheproductivityandtuningtheselectivitytowardslongC-chainproducts.TheelectrodesfortheelectrocatalyticconversionofCO2arepartofaphotoelectrocatalytic(PEC)solarcellconcept,aimedtodevelopknowledgeforthenewgenerationartificialleaf-typesolarcellswhichcanusesunlightandwatertoconvertCO2tofuelsandchemicals.TheCO2reductiontoliquidfuelsbysolarenergyisagoodattempttointroducerenewablesintotheexistingenergyandchemicalinfrastructures,havingahigherenergydensityandeasiertransport/storagethanothercompetingsolutions(i.e.H2).