电气石TiO2复合材料的光催化体系研究冯艳文

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[](20060519)StudyonthephotocatalyticsystemoftourmalineTiO2compositematerialFengYanwen,ZhangQing,ZhuHuajing(TianjinProfessionalCollege,Tianjin300402,China)/TiO2,,(,300402)[]/TiO2,、,。,/TiO2,,,8.15mg/L。,/TiO20.1%,2h93.5Hz86.2Hz。,/TiO250nmTiO2,41.8%。[]-;;;[]TQ032[]A[]1005-829X(2009)10-0045-04Abstract:Tourmaline/TiO2compositephotocatalyticmaterialhasbeenpreparedmainlybythesol-geltechnique.Thedissolvedoxygencontent,thestructureofwatermoleculeclusters,etc.inthephotocatalyticreactionsystemhavebeeninvestigated.Themechanismofphotocatalyticreactionisstudiedwithofphotocatalyticdegradationmethylorangetest.Theresultsshowthatthespeedofdissolvedoxygencontentinthereactionsystemincreasesfasterobviouslywiththeincreaseofthemassfractionoftourmaline/TiO2compositephotocatalystsmaterial.Butthesaturationvaluesofdissolvedoxygencontentareverysimilar,allaround8.15mg/L.Whenthemassfractionoftourmaline/TiO2compositephotocatalysticmaterialis0.1%,thepeakvalueofwatersampledropsfrom93.5Hzto86.2Hz,bysettingasidefor2h.Inaddition,thephotocatalyticdegradationmethylorangetestshowsthatthephotocatalyticactivityofthetourmaline/TiO2compositephotocatalysticmaterialisbetterthanthatofnanoTiO2whosegrainsizeis50nm.Thephotocatalyticdegradationratioofmethylorangecanraise41.8%.Keywords:sol-gel;titania;tourmaline;photocatalysts(Tourmaline)Si、Al、Na、Ca、Mg、BFe、。、、、4~14μm、,〔1-3〕。-TiO2,/TiO2,TiO2,TiO2〔4-6〕。TiO2/TiO2,、,/TiO2,。11.1,500nm,()Al2O334.98%、B2O32910200910IndustrialWaterTreatmentVol.29No.10Oct.,200945——2009-10,29(10)10.94%、K2O0.036%、Na2O0.91%、CaO、MgO0.2%、SiO234.6%、Fe2O315.8%。(,),TiO2,3h,650℃。1.2(1)。/TiO2,,(JPB-607),23.7℃,22.5℃。(2)。。,。TiO2。,。,,,。,O16,O178,9,O17。,O17,O17,。,;,,。VAR-IANUNITEPLUS400。(3)。/TiO2TiO210mg/L,100mL115mm、20mm,9.6mm,。(25W,λ253.7nm),90cm,54.8μW/cm2。,60r/min。20min,-,。22.1。/TiO21。1,/TiO2/TiO2。10min,/TiO20.02%、0.04%、0.06%、0.08%、0.10%、0.12%,7.037、7.120、7.200、7.250、7.300、7.350mg/L,/TiO26.900mg/L。,,107V/m〔5〕。,(1):Er=(2/3)E0(a/r)3(1):a———,m;r———,m;Er———r,V/m;E0———,V/m。,107()~104V/m。,OH-(H2O)n,OH-(H2O)nO2O3H-(H2O)n,。,/TiO2。,TiO2/TiO2。,/TiO2,。10min,/TiO2146——2009-10,29(10)0.02%0.12%,0.313mg/L。/TiO2,0.02%0.12%0.086mg/L。2.2/TiO21(/TiO20.1%)。1:/TiO2,93.5Hz,/TiO20.1%1、2、3h,88.0、86.2、86.2Hz。/TiO2,,。2.310mg/L/TiO2TiO2(50nm)0.5%,2。2,,180min,/TiO2TiO299.4%57.6%。/TiO250nmTiO2。。0.5%5%(180min)。/TiO2,,。2.4/TiO2TiO2,。TiO23.2eV3.0eV,,,(e-cb),(h+vb),—。,,O2·-;,TiO2OH-H2OHO·。(e-cb)(h+vb)TiO2,TiO2,(e-cb),(e-cb)。(e-cb)(e-cb)。/TiO2,,(e-cb),O2·-。,,(h+vb)OH-H2OHO·。,,TiO2(e-cb),,,(e-cb)(h+vb),。3(1),/TiO2,。/TiO2,。/TiO2,0.02%0.12%0.086mg/L。/TiO20.1%2h,11h2h3h/Hz93.588.086.286.2-0.110-0.11-0.23:。,:/TiO247——[](1978—),2004,,。:022-60586078,E-mail:fengyanwen@126.com。[]2009-04-15()Photocatalyticdegradationoffurfuralwastewaterwithnano-TiO2TengHonghui1,LiGuichao2,RenBaixiang1,WangXiaochun1(1.CollegeofEnvironmentalEngineering,JilinNormalUniversity,Siping136000,China;2.ThePrimarySchoolofDongliu,Haicheng114200,China)TiO21,2,1,1(1.,136000;2.,114200)[],TiO2。:pH=2~6150mL0.06gTiO23mLClO2H2O2,,65min,COD67%。,:R=1.3912t(t=0~30min)。R=0.4349t+29.342(t=30~75min)。TiO215,TiO2。[];;[]X703.1;TQ032[]A[]1005-829X(2009)10-0048-04Abstract:UsingbutyltitanateasrawmaterialandCODremovingrateasevaluationquota,TiO2whichwaspreparedbysol-gelmethodhasbeenusedfortreatingfurfuralwastewater.TheresearchresultsshowthatwhenpHis2-6,0.06gofTiO2and3mLofClO2orH2O2areaddedinto150mLofwastewater,beingstirredcontinuouslyandilluminatedunderUVfor65min,theCODremovingratecanreach67%.Thephotocatalyticdegradationreactionincludestwostages,andbothofthemaccordwiththefirstgraderuleofreactivedynamics:R=1.3912t(t=0-30min);R=0.4349t+29.342(t=30-75min).Inaddition,afterTiO2catalysthasbeenrepeatedlyusedfor15times,thephotocatalyticefficiencydoesnotchange.ItprovidessupportfortheindustrialapplicationofTiO2photocatalyticdegradationtothetreatmentoffurfuralwastewater.Keywords:furfuralwastewater;nano-TiO2;photocatalyticdegradation,、、、,,〔1〕。、、[]“”(2007160)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!2910200910IndustrialWaterTreatmentVol.29No.10Oct.,200993.5Hz86.2Hz。(2),/TiO250nmTiO2,41.8%。[][1],,,.TiO2[J].,2003,32(6):569-573.[2],,,.[J].,2002,31(5):503-508.[3],,.[J].,2001,20(4):474-484.[4]LiangJinsheng,FengYanwen.Effectofpost-treatmentonthephotocatalystactivityofmesoporousTiO2thinfilms[J].JournalofMaterialScienceLetters,2003,22(21):1503-1509.[5]NakamuraT,KuboT.Thetourmalinegroupcrystalsreactionwithwater[J].J.Ferroelectrics,1992,137(1):13-31.[6],,,.[J].,2007,26(6):1116-1121.48——

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