納米TiO-,2-的溶劑熱法制備及其在光催化降解氣相苯中的應用.pdf

1、浙江大學碩士學位論文納米TiO的溶劑熱法制備及其在光催化降解氣相苯中的應用姓名：顧卓良申請學位級別：碩士專業(yè)：環(huán)境工程指導教師：吳忠標趙偉榮20070501浙江大學碩士學位論文：納米“noz的溶劑熱法制各及其在光催化降解氣相苯中的應用AbstractRecentlytheproblemofvolatileorganiccompounds(vocs)inworkroomandindoorairhasbeenthefocusofairpol

2、lution皿ereportsaboutitssicknessandsyndromearecommoninoursocietynetraditionaltechnologiessuchasactivitycarbonadsorptionandcatalyticcombustion，havethelimitationofsecondpollutionandpretreatmentofcondensationTherefore，thetec

3、hnologyofphotocatalyticoxidationthatisusedfortheremovalofVOCahasba7omeahotspotsforitscharacterofnotoxicitymildlyreactingconditionandhighlymineralizingInthispapernanosizedTi02particleswithhiighphotocatalyticactivitywerepr

4、eparedbysolvothermalmethod強eamorphoussolidcrystalsizespecificsurfaceandcrystalstructureofproductssynthesizedviadifferentconditions，whichexplainthereasonsofphotocatal、r6cactivityaffectedbysolvothermalconditionwerecharacte

5、rizedbymeansofⅪ【D，TGDSC’TEM。HRTEMBETandUV卻is11lcresultsshowthattakingethanoIasmainsolventandsolvothcrmalsynthesisat200℃for12histhemostoptimalcondition勸ephotocatalyticactivityof骶02preparedbyoptimalsolvothennalmethodis24ti

6、mesashiighasP25ComparingtheTi02preparedbysolvthermalmethodandcalcinedmethodtheTi02withcubicshape，whichpreparedbysolvothermalmethodcontainshighcrystallizationof(101)，thermalstabilityandspecificsurfaceareathalltheTi02withm

7、lelessshapewhichpreparedbycalcinedmethodnephotocatalyticactivityofTi02withsoivothermaltreatmentis37timesashighasTi02withoutsonothermaltreatmentTheresultofcalcinatingTi02whichhadbeentreatcdviasolvothermalmethodshowcalcina

8、tioncannotonlydisimprovethecrystallizationsbutalsodecreasethespeciticsurfacesareaandphotocatalyticactivityFuthermorethetechnologyofloadingcatalysiswasimproved，whichovercomethedefectofunhomogencousdistributionandfallingan

9、ditisaeffectivemethodnegasphasebenzeneunderphotocatalyticoxidationproceededinthecontinuousflowreactorandtheeffectsofinitialconcentrationofbenzene，relativehumidityandconcentrationofoxygenonthephotocatalyticdecompositionra

10、teofbenzenewereinvestigatedneresultsshowthattheoptimumconditionofrelativehumidityis60％AkineticsmodelwithmultifactorswasbuiltbyamendingtheLHmodel，andtheadsorptionmtecoefficientofbenzeneKwater‰andoxygenKowerecalculatedas65

11、xlO。，22x104，and235xl曠m3／mgrespectivelyMoreovertheintermediateproductahexatomicringalcoh01wasdetectedbyFouriertransforminfraredspectroscopywrm)，andthereactionmechanismofgasphasephotocatalyticoxidat／onofbenzeneonTi02Wasspe

12、culatedSolvotherillalmethodcanenhancethephotocatalyticactivity，andpromotetheapplicationofthetechnologyofphotocatalyticoxidationinVOCsdegradationInaword，itisapromisingroutetosynthesizenanosized髓0zKeywords：soivothermalmeth