负载型TiO2光催化剂对有机磷农药废水降解的研究

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()Vol.33No.820058Jour.ofNorthwestSci2TechUniv.ofAgri.andFor.(Nat.Sci.Ed.)Aug.2005TiO2X,(,710062)[]TiO2,(DDVP),,TiO2;,20,30,40cm2TiO2ö,400mL4.5210-4molöL3h39.2%,57.3%81.2%,40cm2TiO2ö20100W,,[]TiO2;;;[]X703.5[]A[]167129387(2005)0820122204,,,,80%[1],,,,,(2040)[2],[3],1976Corey,[4]Ollis[5],,,TiO2,[6],(),()[7]TiO2,[8],TiO2,TiO2,TiO2[9]TiO2,(DDVP),,TiO211.1TiO2TiO299.99%,500W,0.10mm(ICr8N19Ti)99.9%Ar,99.99%O2,,,70mm,1.510-3Pa,,,0.9PaO2Ar=16,TiO2300nm,,(270280),,420X[]2004211224[](GG04072);(SD200303)[](1949-),,,,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.ö,,8cm,1.3TiO2:(CH3O)2POOCHCCl2+9ö2O2hMTiO2PO3-4+2Cl-+4CO2+5H++H2OPO3-4,,,,G=PtP0,,Ptt,P022.1TiO2XRD2TiO2X(XRD)2,TiO2,,TiO2TiO2IATiO2IR,WA=(1+1.25IRIA)-1TiO2TiO2TiO264%,,[10]2.2TiO2ö1,400mL4.5210-4molöL,TiO2ö20,30,40cm2,365nm30W8cmTiO2ö,32TiO2XDRFig.2XRDPatternsofTiO2films3Fig.3DegradationrateofDDVPvsthelightlengthandthefoilarea3,,3TiO2ö3h3218:TiO2©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.ö,TiO2,TiO2(),2.31,TiO2ö20cm2,20,30,40,60,80,100W,8cm,400mL4.5210-4molöL(3h),,44,,,20100W,,,,2.41,TiO2ö20cm2,30W,8cm,0.2310-4,0.5910-4,0.8110-4,1.1310-4,1.3510-4molöL51h,,55,,596.3%,65.8%,52.6%,40.2%,39.6%,,,[11],,TiO2OHO-2,4Fig.4DegradationrateofDDVPvsthelightpower5Fig.5DegradationrateofDDVPvstheinitialconcentration3(1)TiO2(2),,(),;20100W,(3),,,[][1],,.[J].,1995,15(2):115-116.[2],,,.TiO2[J].,2001,10(3):173-175.[3],,.[J].,1999,16(6):354-356.[4],.[J].,2003,24(3):401-407.421()33©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[5]OllisDF,PelizzettiE,SerponeN.Photocatalyzeddestructionofwatercontaminants[J].EnvironMentalScience&Technology,1991,25(9):1522-1529.[6],,,.[J].,2000,18(1):7-11.[7],,,.TiO2[J].,2000,21(2):165-170.[8],,,.[J].,2001,2(2):47-58.[9],,,.TiO2[J].,2003,24(3):465-468.[10],,,.TiO2[J].,2001,22(4):660-662.[11],,,.TiO2[J].,2001,17(10):9-11.PhotocatalyticdegradationoforganophosphoruspesticidesusingTiO2filmssupportedonstainlesssteelYUANSheng-li,ZHANGZong-quan(InstituteofPhysicsandInformationTechnology,ShaanxiNormalUniversity,Xipan,Shaanxi710062,China)Abstract:ThedegradationoforganophosphoruspesticidesDDVPwastewaterwastestedbyusingTiO2filmspreparedbymagnetronsputtering.TheexperimentalresultsshowedthattheTiO2filmsdeposit2edonstainlesssteelhadhigherphotocatalyticactivity.Underthesamecondition,thephotocatalyticdegra2dationrateofDDVPsolutionwere39.2%,57.3%and81.2%respectivelyfordifferentareasofTiO2filmswhenthevolumeofDDVPsolutionwas400ml,initialconcentration4.5210-4molöLandthelightingtime3h.ThephotocatalyticdegradationefficiencywasbestwhentheareaofTiO2filmswas40cm2.Thephotocatalyticdegradationratehadbasicallylinearrelationwithlightintensityat20-100W.Thedegrada2tionratebecamelowerwiththeinitialconcentrationincreased.Keywords:TiO2nanometerthinfilms;photocatalyticdegradation;degradationofpesticidewastewa2ter;DDVP5218:TiO2