無機包膜二氧化鈦的研究.pdf

1、天津大學碩士學位論文無機包膜二氧化鈦的研究姓名：於莉莉申請學位級別：碩士專業(yè)：化學工程指導教師：康仕芳2001.1.1墨堡奎蘭堡主堡苧塑蔓AbstractBymeansofliquidphasedeposition(LPD)method，inorganiccoatingOFtruffleTiC2particlesexperimentwasmadeunderdifferentconditions，hence—aftercompositep

2、articleswithaTiOzcoreandasurfacelayerofsilicaandaluminacoatingsonfutilewereobtainedandthenthesurfaceofrutileWasmodifiedTheeffectsofdifferentexperimentalfactorsinacidsolubilitywerestudiedDifferencesofTiC2particlescoatingd

3、ispersionandphotoactivity&beforeandaftercoatingswerestudiedDifferencesofappearanceandmicroslructureofbeforeandaftercoatingTi02particleswerecomparedThemechanismofsurfacemodificationofrutileparticleswasstudiedItWasfoundedt

4、hat，theoptimalcoatingconditionforsilicaonlyonsamplesissolutionpHbelween9and10，heatingtemperature80X3，lowsulfuricacidconcentrationWhensolutionofpHbetween7and9favorsthealuminaprecipitatedontheTi02particlesSilicaonlyonthesu

5、rfaceofTi02paniclesgaverisetogooddispersionstabilityandhighphoto—activityAluminaonlyonthesurfaceofTi02particles，ontheotherhandgavepoorstabilityandlowphotoactivityGooddispersionstabilityandlowphoto—activityWasobservedwith

6、aSi／A1ratiotowerthan2Itwasobservedbytransmissionelectronmicroscope(TEM)toshowtheexistenceofathinlayeronTiC2particlesThesurfaceareasofsilicaandaluminacoatingsonruffleWasprovedtobecompactbythewayoftheadsorptionofnitrogen(B

7、ET)AccordingtothedifferenceofthebindingenergyofTi29electronofthecoatingsdeterminedbyXrayphotoelectronspectroscopy(xps)，itoanbeinferredthatsilicaandaluminainthecoatinglayerarecombinedtoTi02surfacethroughkindchemicalbondKe