《afacilestrategytofabricatewell-definedmesoporousγ-al2o3microcubeswithgoodadsorptionperformancetowardscr(vi)rem

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1、MaterialsLetters143(2015)294–297ContentslistsavailableatScienceDirectMaterialsLettersjournalhomepage:www.elsevier.com/locate/matletAfacilestrategytofabricatewell-definedmesoporousγ-Al2O3microcubeswithgoodadsorptionperformancetowardsCr(VI)removalnYuguoXia,LiZhang,YanWang,XiulingJiao,Dair

2、ongChenSchoolofChemistry&ChemicalEngineering,NationalEngineeringResearchCenterforColloidalMaterials,ShandongUniversity,Jinan250100,PRChinaarticleinfoabstractArticlehistory:Afacilerouteisinitiatedtofabricatewell-definedmesoporousγ-Al2O3,withathree-dimensionalmicro/Received11October2014na

3、nostructure,usingbasicaluminumsulfate(BAS)microcubesasprecursor.Theas-synthesizedγ-Al2O3Accepted25December2014iscubic-likeinmorphologywithanaveragesizeofca.6μm.Mesoporousγ-Al2O3synthesizedbythisAvailableonline2January2015methodishighlythermalstableandexhibitssuperioradsorptionperforman

4、ce(maximumadsorptionKeywords:capacity9.93mg/g)withgoodrecyclingefficiency(morethan76%ofitsoriginaladsorptioncapacityγ-Al2O3after4cycles)asanadsorbenttoremovetheheavymetalionsCr(VI)asaresultofitsuniquestructure,Microcubeswhichmadeittobeapromisingmaterialforenvironmentalremediation.Porous

5、materials&2015ElsevierB.V.Allrightsreserved.MicrostructureAdsorption1.IntroductionperformancewithgoodrecyclingefficiencyasanadsorbenttoremovetheheavymetalionsCr(VI).Waterpollutionduetothedisposalofindustrialeffluentsenrichedwithtoxicmetallicspecieshasdrawnconsiderableattentionsbecauseofi

6、tsharmfuleffectsonfauna,floraandhumanbeing.Cr2.Experimentalprocedure(VI),asaheavymetalpollutant,isconsideredtobetoxicanditsefficientremovalfromwaterisofgreatimportance[1].Amongall18.0gAlOOHrawnanoparticles(0.1molfromShandongAlumi-techniquesforCr(VI)treatment,mesoporousmaterialexhibitshig

7、hnumCorporation)wereaddedintodeionizedwatertoform100mLremovalefficiencyduetoitsrelativehighsurfacetobulkratioandwell-dispersedsuspensionundervigorousstirringfor0.5h,andgreaternumberofactivesitestointeractwiththepollutantspecies80mmolH2SO4wasthenaddedintothissuspension.Treatedbya[2].As