共掺杂型tio2可见光催化剂的制备 表征及其性能分析

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3、11!』!1·』·4删蚪磐鞘Y1940977黑龙江大学硕士学位论文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)，FouriertransitioninfraredspectrafFT-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-