简介：Thispaperreportsthatpolarizedfar-infraredreflectivitymeasurementshavebeendoneonLiGaO2singlecrystalalongtwocrystallineaxesatdifferenttemperatures.Thetemperaturedependentfrequenciesofthelongitudinalandtransverseopticalphononhavebeenobtainedfromtherealpartofopticalconductivityandthelossfunctionrespectively.AsmallDrudecomponentisobservedatfrequencybelow300cm-1whichcouldarisefromLiionsoroxygendeficiencies.TheionicityofLiGaO2hasbeenstudiedfromtheanalysisoftheBorneffectivechargeofdifferentions.

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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.

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

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

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简介：TheNd2O3nanoparticleswhichmodifiedbyAOTwaspreparedusingmicrioemulsionmethodinthesystemofwater/xylene.L3edgeXAFSwasusedtodeterminethedifferenceofthelocalstructurearundNd^3+ionandtheelectricalstructurebetweenthenanocystallineNd2O3andthecoarsebulkmicrocrystallineNd2O3.ItwasfoundthatNd-Odistanceincreasedwiththeformofnanocrystalliteandtheintensityofabsorptionedgealsoenhancedatthesametime.

简介：HL-2Adataacquisitionsystem(DAS)wasdevelopedandusedinengineeringtestslastyear.Themainpartsofthesystemincludetheexperimentnetwork,thedataacquisitionandprocessingmechanisms,andthegraphandcharacterdisplayequipments.

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简介：Tungstendisulfide（WS2）isatypeofanisotropic-layeredcompoundandhasbroadbandsaturableabsorptionfeaturesassaturableabsorbers（SAs）.WithWS2-basedSAs,darksolitonsinerbium-dopedfiber（EDF）lasersarefirstobtained.Forthegenerateddarksolitons,thecenterwavelengthismeasuredtobe1530nm,andtherepetitionrateisabout116.5MHz.Aseriesofopticalspectraisexhibited.Theelectricalsignal-to-noiseratioisbetterthan94dB.ResultsinthispaperdemonstratethatWS2-basedSAsarethepromisingSAsforgeneratingdarksolitonsinEDFlasers.

简介：TheCasimireffecthasbeenstudiedforvariousquantumfieldsinbothfiatandcurvedspacetimes.Asafurtherstepalongthisline,weprovideanexplicitderivationofCasimireffectformasslessspin-3/2fieldwithperiodicboundaryconditionimposedinfour-dimensionalMinkowskispacetime.ThecorrespondingresultswithDirichletandNeurnannboundaryconditionsarealsodiscussed.

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简介：TheHL-2ANBIdesignparametersarehydrogenbeamenergy60keY,thepulsedurationof2s,consistoftwobeamlinesandinjectedalongtangentialdirection.Theneutralbeampowerwillarrive4MWinthefuture.Thefirststepisonebeamlineandtwoionsources.Thevacuumvesselconsistsofmajorchamber,minorchamberandionsourcechamberanddriftduct.Weneedavacuumsystem,whichcapacityissufficientandtherelativelylowcostsofit.

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