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3、11!』!1·』·4刪蚪磐鞘Y1940977黑龍江大學(xué)碩士學(xué)位論文AbstractNano—sizedTi02photocatalytictechnologyhasdevelopedtobeakindofhi出efficientandenvironmentalpollutioncontroltechnologies.Thecurrentresearchfocusesontheenhancementofphotocatalyticactivityandtheefficiencyofutilizingvisible—li
4、ght.BasedonthecurrentresearchofphotocatalystdopingTi02homeandabroad,tri—dopedTi02nRno-particlesweresynthetizedinthispaper.Thestructuresandphysicalandchemicalpropertiesoftheas··preparedsampleswerecharacterizedbyX--raydiffraction㈣),nitrogenadsorption/desorptionmeasurements(BET),Raman
5、spectroscopy(Raman),X—rayphotoelectronspectroscopy(xPs),F(xiàn)ouriertransitioninfraredspectrafFT-rR),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),UV-Visdiffusereflectancespectroscopy(DRS)andsurfacephoto-voltagespectroscopy(SPS).Thephotocatalyticactivitiesofthetri-
6、dopedTi02photocatalystswereevaluated缸ou曲mede伊ad撕0nofRjlBandphen01uIldervisible·119htPirradiation,whichwerecomparedwiththebehaviorsofthehome-madepureTi02andcommercialDegussaP25Ti02.Inaddition,themechanismsoftheenhancementofvisible—lightphotocatalyticactivityofthetri-dopedTi02nano-pa
7、rticleswereanalyzedindetailed.(1)Fe-N—S-tridopedTi02photocatalystwaspreparedviaasol-gelprocessbyusingammoniumferroussulfateasdopant.Theeffectsofthedopingdosageandcalciningtemperatureonthestructureandphotocatalyticactivityofthetri—dopedTi02photocatalystswereinvestigated.Theresultssh
8、owedthattheextensionoflightabsorptionedgeintherangeofvisible—lightWasupto670nm.ThemodifiedTi02calcinedat350℃with1.0m01%ammoniunlferroussulfatecontentexhibitedthebestphotocatalyticperformance.Underthevisible—lightirradiation、析m120min,theremovalrateforRhBcouldachieve91.5%..1I.喻Abstra
9、ct(2)C-N—S-tridopedTi02photocatalystwaspreparedthroughasol-gelprocessbyusingcystineasdopant.111eeffectsofthedopingdosageandcalciningtemperatureonthestructureandphotocatalyticactivityofthetri—dopedZi02photocatalystswerealsoinvestigated.Theresultsshowedthattheextensionoflightabsorpti
10、onedgeintherangeofvisible-