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1、ColloidPolymSci(2013)291:2515–2521DOI10.1007/s00396-013-2996-8ORIGINALCONTRIBUTIONSynthesisofMg2Al-Cllayereddoublehydroxidenanosheetsinasurfactant-freereversemicroemulsionJieXu&LinZhang&DongxiangLi&JikuanZhao&WanguoHouReceived:16March2013/Revised:25April2013/Accepted:26M
2、ay2013/Publishedonline:8June2013#Springer-VerlagBerlinHeidelberg2013IIIIIx+n−x−IIAbstractThesynthesisofMg2Al-Cllayereddoubleformula[M1−xMx(OH)2][Ax/n]·mH2O,whereMandIIIn−hydroxide(LDH)nanosheetsinasurfactant-freereverseMaredi-andtrivalentmetalcations,respectively,Aisanmi
3、croemulsionisdescribed.Themicroemulsionwasinterlayeranion(orgalleyanion)ofchargen,xisthemolarIIIIIIIIcomposedoftoluene,isopropanol,andanaqueousso-ratioofM/(M+M),andmisthemolaramountoflutionasthedispersedphase.AnaqueousLDHnanosheetcointercalatedwater.ThechemistryofLDHshas
4、beenwidelydispersionwasobtainedbyadouble-microemulsiontech-studiedbecauseoftheiruniquestructuralpropertiesandexten-nique.LDHnanosheetswerecharacterizedbyX-raypowdersiveapplications[1–3].diffraction,transmissionelectronmicroscopy,scanningelec-Thesynthesisoftwo-dimensional
5、(2D)LDHnanosheetstronmicroscopy,atomicforcemicroscopy,Fouriertransformhasreceivedconsiderablerecentattention[4–20].Thean-infraredspectroscopy,andthermogravimetricandelementalisotropyofLDHultrathinsheets,withathicknessofca.1nmanalyses.TheLDHnanosheetsconsistedofasinglebru
6、citeandalateralsizeofca.0.1–1μm,allowstheiruseasanideallayerwithoutanyloadingoforganicmolecules.Tothebestof2Dquantumsystemforstudyingfundamentalphysicsorasaourknowledge,thisisthefirstreportofanakedLDHmono-buildingblockforfunctionalmaterials[1].LDHnanosheetslayeraqueousdi
7、spersionbeingdirectlyobtained.TheLDHaregenerallysynthesizedby“top–down”(LDHdelamina-monolayerscanbeusedasbuildingblocksforLDH-basedtion)and“bottom–up”routes,withtheformerbeingthemostfunctionalmaterials.widelyused[1].However,LDHsaredifficulttoexfoliateintoindividualnanopl
8、ateletsbecauseofthehighintralayerKeywordsLayereddoublehydroxide.Surfactant-freechargedensity[1].Anorgan
