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氢氧化钠改性氧化石墨烯吸附性能的研究.docx

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氢氧化钠改性氧化石墨烯吸附性能的研究 Title:InvestigationontheAdsorptionPerformanceofSodiumHydroxideModifiedGrapheneOxide Introduction: Grapheneoxide(GO)hasattractedsignificantattentionduetoitsuniquephysicochemicalproperties,suchasalargesurfacearea,abundantfunctionalgroups,andexcellentmechanicalstrength.However,theagglomerationandpoordispersionstabilityofGOinaqueoussystemslimititspracticalapplications.Toovercomethesechallenges,varioustechniqueshavebeendevelopedtomodifyGO,enhancingitsadsorptionperformance.Amongthem,sodiumhydroxide(NaOH)modificationhasshownpromisingresults.ThisstudyaimstoinvestigatetheeffectofNaOHmodificationontheadsorptionperformanceofgrapheneoxide. ExperimentalMethod: 1.PreparationofNaOHmodifiedgrapheneoxide: a.GrapheneoxidesynthesisusingthemodifiedHummersmethod. b.NaOHmodificationprocessbydispersingGOinaNaOHsolutionfollowedbysonicationandfiltration. c.ThoroughwashingofNaOHmodifiedGOtoremoveanyresidualimpurities. d.DryingandcharacterizationofNaOHmodifiedGOusingtechniquessuchasSEM,TEM,FTIR,andRamanspectroscopy. 2.Adsorptionperformanceevaluation: a.Batchadsorptionexperimentsusingvariousconcentrationsoftargetpollutants(e.g.,heavymetals,organiccompounds). b.DeterminationoftheadsorptioncapacityandefficiencyofNaOHmodifiedGObyanalyzingtheconcentrationofpollutantsbeforeandafteradsorptionusingappropriateanalyticaltechniques. c.InvestigationoftheadsorptionkineticsandequilibriumisothermsofNaOHmodifiedGOtounderstandtheadsorptionmechanism. d.ComparisonswithpristineGOandothermodifiedGOmaterialstohighlighttheadvantagesofNaOHmodification. ResultsandDiscussion: 1.Morphologyandstructurecharacterization: a.SEMandTEManalysisshowingthemorphologyandstructuralchangesofGObeforeandafterNaOHmodification. b.FTIRandRamanspectroscopyresultsindicatingthesuccessfulintroductionoffunctionalgroupsontheGOsurface. 2.Adsorptioncapacityandefficiency: a.EvaluationoftheadsorptionperformanceofNaOHmodifiedGOforvariouspollutants. b.ComparisonoftheadsorptioncapacityandefficiencywithpristineGOandothermodifiedGOm