简介：

简介：Themixedmatrixmembranes(MMMs)weredevelopedbyincorporatinggraphiteoxide(GO)flakesfunctionalizedwithironoxide(Fe3O4)intoPebaxmatrix.ThePebax/Fe3O4-GOMMMswereusedtoseparateCO2/CH4andCO2/N2gasmixture.TheresultsshowedthattheMMMswithmagneticalignmentpresentedthebettergasseparationperformancethanthatofrandomarrangementofPebax/Fe3O4-GOmixedmatrixmembranes.ThereasonwasthattheFe3O4-GOflakesarrangedmagneticallyinthemembraneplayedamultipleroleinimprovingtheperformanceofMMMs.Firstly,undertheactionofthemagneticfield,themagneticalignmentofFe3O4-GOflakesinPebaxmatrixconstructedtheshortertransferpathforgasmolecule,increasingtheCO2permeability.Secondly,thehydroxylgroupsinGOflakesandthepresenceofFe3O4havestrongerbindingforceforwater,improvingtheCO2solubilityselectivity.Thirdly,thebetterinteractionbetweenthemagneticalignmentofGOcompositesandpolymermatrix,reducedtheinterfacedefects.Especially,theoptimumgasseparationperformsneewasobtainedattheFe3O4-GOflakescontentof3wt%inPebaxmatrixatverticalarrangementwithselectiv让yof47and75forCO2/CH4andCO2/N2,respectively,andCO2permeabilityof538Barrerat0.2MPaandroomtemperature.

简介：Compositesofcarbonaerogelandgraphiteoxide(GO)weresynthesizedusingaself-assemblymethodbasedondispersiveforces.Theirsurfacewasmodifiedbytreatmentinhydrogensulfideat650and800℃.Thesamplesobtainedwerecharacterizedbyadsorptionofnitrogen,TA-MS,XPS,potentiometrictitration,andHRTEMandtestedascatalystsforoxygenreductionreactions(ORR)inanalkalinemedium.Thesynergisticeffectofthecomposite(electricalconductivity,porosityandsurfacechemistry)leadstoagoodORRcatalyticactivity.Theonsetpotentialforthecompositeofcarbonaerogelheatedat800℃isshiftedtoamorepositivevalueandthenumberofelectrontransferwas2e-atthepotential0.68VversusRHEanditincreasedto4e-withanincreaseinthenegativevaluesofthepotential.Anexcellenttolerancetomethanolcrossoverwasalsorecorded.

简介：ThefutureGSIOnline-Offline-Object-OrientedanalysisframeworkGo4basedonROOT[CERN,R.Brunetal]providesamechanismtomonitorandcontrolananaluysisatanytime.ThisisachievedbyrunningtheGUIandtheanalysisindifferenttasks.Tocontrolthesetasksbyonenon-lbockingGUI,theGo4TaskHandlerpackagewasdeveloped.Itoffersanasynchronousintertaskcommunicationviaindependentchannelsforcommands,data,andstatusinformation,Eachchannelisprocessedbyadedicatedthreadandhasabufferqueueasinterfacetotheworkingthread.ThethreadsarecontrolledbytheGo4ThreadMAanagerpackage,basedontheROOTTThreadpackage,InparalleltotheGUIactions,theanalysistaskscandisplayobjectslikehistogramsintheGUI.AtestGUIwasimplementedusingtheQtwidgetlibrary(TrolltechInc.).AQttoROOTinterfacehasbeendeveloped.TheGo4packagesmaybeutilizedforanyROOTapplicationthatrequirestocontrolindependentdataprocessingormonitoringtasksfromanon-blockingGUI.