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MXeneCOF复合膜的制备和分离性能研究.docx

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MXeneCOF复合膜的制备和分离性能研究 Title:PreparationandSeparationPerformanceStudyofMXeneCOFCompositeMembrane Abstract: Inrecentyears,MXeneCOFcompositemembraneshaveemergedaspromisingmaterialsforvariousseparationapplicationsduetotheiruniqueproperties.ThispaperaimstoexplorethepreparationmethodsandevaluatetheseparationperformanceofMXeneCOFcompositemembranes.Thediscussionprovidesinsightsintothedevelopmentofnovelmembranematerialsforadvancedseparations. 1.Introduction: Membrane-basedseparationprocesseshavegainedsignificantattentionduetotheirenergyefficiency,simplicity,andenvironmentalfriendliness.MXeneCOFcompositemembranes,whichcombinethemechanicalstrengthandflexibilityofMXenenanosheetswiththehighselectivityandporosityofcovalentorganicframeworks(COFs),haveshowngreatpotentialingasseparation,watertreatment,andmolecularsievingapplications.ThispaperpresentsacomprehensivereviewofthepreparationtechniquesandseparationperformancestudyofMXeneCOFcompositemembranes. 2.PreparationMethodsofMXeneCOFCompositeMembranes: 2.1SynthesisofMXeneNanosheets: MXenesareaclassoftwo-dimensional(2D)materialscomposedoftransitionmetalcarbides,carbonitrides,ornitrides.ThesynthesisofMXenenanosheetsinvolvestheetchingoftheMAXphaseprecursor.Variousetchingmethodshavebeenexplored,includingthehydrofluoricacid(HF)etchingmethodandtheintercalation-etchingmethod.ThepreparedMXenenanosheetscanprovidehighmechanicalstrengthandelectricalconductivitytothecompositemembrane. 2.2SynthesisofCOFs: COFsarehighlycrystalline,porousmaterialswithtunablestructuresandproperties.ThesynthesisofCOFsinvolvesthecondensationoforganicbuildingunits,suchasaromaticaldehydesandamines,toformextendedframeworks.ThechoiceofbuildingblocksandreactionconditionscandeterminetheporosityandselectivityoftheCOF.Varioussyntheticstrategies,includingsolvothermalmethodsandroomtemperaturereactions,havebeenemployedtoprepareCOFs. 2.3PreparationofMXeneCOFCompositeMembranes: TheincorporationofMXenenanosheetsintoCOFframeworkscanbeachievedthroughvariousmethods,includinginsitugrow