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《介孔材料（mesoporous material）》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、介孔材料（Mesoporousmaterial）classificationAccordingtotheclassificationofchemicalcomposition,mesoporousmaterialscangenerallybedividedintotwomajorcategories:siliconandnonsilicon.1.siliconbasedmesoporousmaterialshavenarrowporesizedistribution,regularporestructureandmaturetechnology.Siliconmaterialsare
2、availableforcatalysis,separationandpurification,drugencapsulation,slowrelease,gassensingandotherfields.Siliconbasedmaterialscanbedividedintotwogroupsaccordingtopuresiliconandotherelements.Theclassificationcanbecarriedoutaccordingtothekindsofdopedelementsandthenumberofdifferentelements.Heteroato
3、mdopingcanberegardedasheteroatominsteadofsiliconatoms,introducingdifferentheteroatomswillbringmanynewpropertiestothematerial,suchasstability,changesofhydrophilichydrophobicpropertiesandthechangeofcatalyticactivitychangeandsoon.2.nonsiliconmesoporousmaterialsmainlyincludetransitionmetaloxides,ph
4、osphatesandsulfides.Becauseoftheirexistenceofvariablevalencestates,itispossibletoopennewapplicationfieldsformesoporousmaterialsanddemonstratethepotentialapplicationsofsilicon-basedmesoporousmaterials.Forexample:aluminumphosphatemolecularsievePmaterialshavebeenreplacedbySiaftertheformationofsili
5、conaluminiumphosphate(silicon-aluminophosphate,SAPOs),aluminumphosphateintroducedtwovalentmetalinthearchitecture(metal-substitutedAIPOsMAPOs)hasbeenwidelyusedinadsorption,catalyst,acidcatalysis,oxidationcatalysts(suchasmethanolOlefinationofhydrocarbonsoxidation)etc..Activatedcarbonwithlargesurf
6、aceareaandhighporevolumehasbecomethemainindustrialadsorbentbecauseofitshighadsorptioncapacityandtheadsorptionofdifferenttypesofcompoundsfromthegasandliquid.Inaddition,thechargestoragecapacityofthedoublelayercapacitormaterialmadeofmesoporouscarbonishigherthanthatofthemetaloxideparticle,andthecap
7、acitanceismuchhigherthanthatofthecommercialmetaloxidedoublelayercapacitor.Titaniabasedmesoporousmaterialshavemanyadvantagessuchashighphotocatalyticactivityandhighcatalyticcapacity.Manystudieshavebeendoneontheirstructure,properties
