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当前位置:首页 > 商业/管理/HR > 公司方案 > 多种光源下氮掺杂TiO2光催化降解染料废水的研究石建稳
InvestigationonthephotocatalyticdegradationofdyeingwastewaterbyusingN-dopedtitaniaundervariousilluminantsShiJianwen,ChenShaohua,WangShumei,YeZhilong(KeyLaboratoryofUrbanEnvironmentandHealth,InstituteofUrbanEnvironment,ChineseAcademyofSciences,Xiamen361021,China)TiO2,,,(,361021)[],-TiO2,,、,TiO2。:TiO2;TiO2,n(N)∶n(Ti)10%500℃TiO2;,TiO2TiO2。[];;;[]X703.1[]A[]1005-829X(2010)09-0050-04Abstract:AseriesofN-dopedtitaniapowdershavebeenpreparedbysol-gelmethodusingureaasnitrogensource.ThephotocatalyticdegradationcapacityofdyeingwastewaterwithN-dopedtitaniapowdersisinvestigatedundervisi-blelight,simulatedsunraysandultravioletlight,respectively.TheresultsshowedthatN-dopingcanimprovethephotocatalyticactivityoftitaniaundervisiblelight.Nitrogencontentandcalcinationtemperaturecanremarkablyin-fluencethephotocatalyticactivityoftitania.Whenpercentageofn(N)∶n(Ti)is10%andtheN-dopedtitaniathatiscalcinedat500℃possess,itsphotocatalyticactivitiesunderbothvisiblelightandsimulatedsunlightareoptimal.However,thephotocatalyticactivityofN-dopedtitaniaislowerthanthatofun-dopedtitaniaunderultravioletlight.Keywords:N-doping;titania(TiO2);photocatalytic;dyeingwastewater[](2009H4006);(0714171B10)。,、、、、,。、、,〔1-2〕。TiO2(HO·),、,、,TiO2〔3〕。TiO2(3.2eV),,〔4〕。2001R.Asahi〔5〕TiO2,,TiO2。TiO2,、-。,-TiO2,,、,()TiO2。11.1TiO2,、,30920109IndustrialWaterTreatmentVol.30No.9Sep.,201050——2010-09,30(9),;17mL,;,,,;,80℃,;,2h,TiO2。,TiO2()。,TiO2TiO2TiN(X)YTiY,Xn(N)∶n(Ti),Y。1.2XPA-7()。500W(365nm),11000W,(1000W)420nm。50mL,20mg/L,,。,30min,,。,,SpectraMaxM5465nm。0~45mg/L,〔6-7〕,,,:Ct/C0=At/A0(Ct、Att,C0、A0)。22.1TiO2TiO21,,。1,,,;TiO2,TiO2P25;TiO2,,,,〔8〕,n(Ni)∶n(Ti)10%,。2.2TiO2n(N)∶n(Ti)10%TiO22,,TiO2P25。2,TiO2,TiO2,500℃TiO2,,,700℃,TiO2TiO2P25。,,TiO2,TiO2,、,TiO2〔9〕。2.3TiO2TiO2TiO2n(N)∶n(Ti)10%TiO2,3。,:TiO251——2010-09,30(9)3,TiO2P25,TiO2,TiN(10)500。2.4TiO2TiO2TiO2n(N)∶n(Ti)10%TiO24。4,,,30min,TiO2TiO2,Ti600。2.5TiN(10)500、、,TiN(10)500,TiN(10)50035。5,TiO2,,365nm,,20min;,TiN(10)500,40min;420nm,,300min,76.04%,TiO2〔9〕,TiN(10)500TiO2P25(2)。3(1),-TiO2,,。(2)TiO2,n(N)∶n(Ti)10%500℃TiO2,,TiO2TiO2。(3)n(N)∶n(Ti)10%500℃TiO2,20min;,40min;,TiO2P25。[][1],,.[J].,2001,21(12):1-4.[2],,,.Fe2O3/Al2O3[J].,2009,29(4):27-30.[3],.[J].,2006,26(6):1-4.[4],,,.TiO2[J].,2009,29(4):50-52.[5]AsahiR,MorikawaT,OhwakiT,etal.Visible-lightphotocatalysisinnitrogen-dopedtitaniumoxides[J].Science,2001,293(5528):52——Synthesisofdicyandiamide-glyoxalpolycondensatedecolorizingflocculantanditsapplicationZengXiaojun,LuZhongpei,WuRuixiang,WangChunguang(SchoolofChemistryandMaterialsEngineering,ChangshuInstituteofTechnology,Changshu215500,China)-,,,(,215500)[],-(DG)。、、-。,33.6g,62g,21.6g,65℃,3h-,≥93%,CODCr≥66%。,PAC+DG,,、,,:CODCr<60mg/L,<30。[]-;;[]TQ314.412;X703.1[]A[]1005-829X(2010)09-0053-04Abstract:Dicyandiamide-glyoxalpolycondensatedecolorizingflocculantshasbeensynthesizedbyusingdicyandi-amideandglyoxalasrawmaterials,andammoniumchlorideascatalyst.Theeffectsofsomefactors,suchastheamountofglyoxalandammoniumchloride,reactiontemperature,reactiontimeonthesynthesisofthedicyandiamide-glyoxalpolycondensatedecolorizingflocculantsarestudiedbyorthogonalexperiment.Theresultsshowthatthebestconditionsareasfollows:dicyandiamide33.6g,glyoxal62g,ammoniumchloride21.6g,reactiontemperature65℃andreactiontime3h,thedecolorizingefficiencyoftheflocculantisthebest,≥93%,theremovalefficiencyofCODCris≥66%.ThepracticeresultsshowthattheflocculantproducedbyPAC+DGisbigandcompact,itsdegrada-tionvelocityfast,sludgeproducedless,dosageusedless.ThebesteffluentCODCris<60mg/Landchroma<30times.Keywords:dicyandiamide-glyoxalpolycondensate;flocculants;printinganddyeingwastewater269-271.[6],,.[J].,1998,19(1):1-4.[7],,,.TiO2[J].,1999,45(4):389-392.[8]IrieH,WatanabeY,HashimotoK.Nitrogen-concentrationdepen-denceonphotocatalyticactivityofTiO2-XNXpowders[J].JournalofPhysicalChemistryB,2003,107(23):5483-5486.[9],,,.[J].:,2006,34(12):78-81.[](1976—),2007(),,,。:0592-6190528,E-mail:shijnwn@163.com。[]2010-05-13()[]([2008]34)-,,。,,、,,,、、pH≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥30920109IndustrialWaterTreatmentVol.30No.9Sep.,201053——
本文标题:多种光源下氮掺杂TiO2光催化降解染料废水的研究石建稳
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