TiO2溶胶的制备及其胶凝过程影响因素分析

TiO2,,(,430074)[](Acac),,2TiO2(Acac),[]TiO2,Acac,2,[]TQ031.2[]A[]1001-3660(2004)01-0030-02PreparationofTiO2SolandAnalysisonGelationProcessWENMin,QIGong2tai,SUNJu2mei(CentralChinaUniversityofScienceandTechnology,Wuhan430074,China)[Abstract]Withacetylacetone(Acac)ascomplexationpreparation,Ti(OBu)4asprecusor,TiO2solwaspreparedbysol2gelmethod.ThroughchangingtheamountofAcac,water,solvent,catalystandhydrolysistemperature,thegelationtimewiththeirdifferentfactorswerestudied.[Keywords]TiO2Sol;Acac;Sol2gel;Gelationtime[]2003-09-30[](1979-),,,,0TiO22TiO2[14],(Acac),2TiO2,[510],TiO212TiO21[Ti(OC4H9)4](C2H5OH)(CH3COCH2COCH3)HClTiO2,Acac,,782130min,KQ11810min,,++++Acac30min10min12TiO2222[M(OR)n]2,:M(OR)n+H2OM(OH)(OR)n-1+ROH(1)M(OH)(OR)n-1+H2OM(OH)2(OR)n-2+ROH,M(OH)n-M-OH+HO-M--M-O-M+H2O(2)-M-OR+HO-M--M-O-M+ROH(1)(2)22,22,,Kh=10-3mol/(Ls)[6],,,(Acac):TiO230Ti(OBun)4+mAcacHTi(OBun)4-mAcacm+mBun-OH,,,OH-,,Ti(OBun)4OH-Ti(OBun)4,,2.1,,,,,AcacA,B,BA,,,,,TiO2,2.2Acac,n(C2H5OH)/n[Ti(OBu)4]=10n(HCl)/n[Ti(OBu)4]=0.03,,Acac,TiO22,3n(Acac)/n[Ti(OBu)4]=00.10.3,23,Acac,,,Acacn(Acac)/n[Ti(OBu)4]2[11],[8],n(H2O)/n[Ti(OBu)4]=4,,Acac(n=00.10.3),,,,,,,,n(Acac)/n[Ti(OBu)4],(2),Acac,,n=4,TiO2,(n4),,,TiO2,TiO2,,,2n(Acac)/n[Ti(OBu)4]0.4,22.3n(H2O)/n[Ti(OBu)4]=3n(Acac)/n[Ti(OBu)4]=0.3n(HCl)/n[Ti(OBu)4]=0.03,,33,,,40,,40,,,,,,,,,,,,,2.4n(H2O)/n[Ti(OBu)4]=3n(Acac)/n[Ti(OBu)4]=0.3n(HCl)/n[Ti(OBu)4]=0.03,,n(C2H5OH)/n[Ti(OBu)4],4,,n,H2O,H2O,,TiO2,,,,,,,,45HCl2.5HCln(C2H5OH)/n[Ti(OBu)4]=10n(H2O)/n[Ti(OBu)4]=1n(Acac)/n[Ti(OBu)4]=0,HClpH,,n(HCl)/n[Ti(OBu)4],5,HCl(39)331Vol.33NO.120042SURFACETECHNOLOGYFeb.2004315;75h,,CO2H2S,,,,,[6]:,;,,;,,;,Fe2Al5,3(1)0%1.0%,,,;(2)CO2:0%1.0%,,;1.0%,,2(3)H2S:CO2;1.0%,,3[][1].[J].,1991,18(5):5155.[2].[J].,1997,18(5):4850.[3],.[J].,1998,18(5):13.[4].[J].,1999,20(1):6971.[5],.[J].,1999,17(1):4245.[6],,,.H2S23%NaCl2H2O[J].,2001,34(6):1012.(31)5,,pH,n(HCl)/n[Ti(OBu)4]0.3,pH2,22.62HCl,TiO2[][1],,.TiO2[J].,2002,35(7):45.[2],,,.2[J].,2001,34(12):1213.[3],,,.22SiO2[J].,1994,25(1):82.[4],,.SiO22TiO22ZrO2[J].,2002,35(5):79.[5]C.Legrand2Buscema,C.Malibert,S.Bach.Elaborationandcharacteriza2tionofthinfilmofTiO2preparationbysol2gelprocess[J].ThinSolidFilms,2002,418:7984.[6],.NMPTiO2[J].,2002,19:882885.[7],.Ti(OC4H9)4[J].,2002,2(2):435438.[8],,,.2TiO2[J].,1999,30(4):407409.[9],.2TiO2[J].,2001,25(6):8891.[10]Attia,SM,,.2TiO2[J].,2001,29(10):12091212.[11]PontonA,Barboux2DoeuffS,SanchezC.Rheologyoftitaniumoxidebasedgels:determinationofgelationtimeversustemperature[J].ColloidsandSurface,2000,162:177192.331Vol.33NO.120042SURFACETECHNOLOGYFeb.200439