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TiO2TiO2TiO2TiO2TiO2TiO2TiO2PhotocatalyticOxidationTechnologyandItsApplicationinWaterTreatmentAbstract:PhotocatalysisoxidationreactionmechanismofTiO2andthemethodtoimproveitsefficiencywasintroduced.TheapplicationofTiO2photocatalysisoxidationtechnologyinthetreatmentofdyewastewater,pesticidewastewater,oilywastewater,papermakingwastewater,wastewatercontainingsurfactantanddrinkingwaterwasreviewed.Itscurrentproblemswerebrieflydiscussedanditsapplicationprospectwasanalyzed.Keywords:TiO2;photocatalyticoxidationtechnology;watertreatment1972FujishimaHonda[1]TiO2()pHTiO2[2]1TiO2TiO2N(VB)(CB)TiO23.2eV3.2eV(387.5nm)TiO2(e-)(h+)TiO2TiO2O2[3]TiO2he-h+h+H2OOHH+h+OH-OHO2e-O2O2H+HO22HO2O2H2O2H2O2O2OHOH-O22TiO22.1TiO2OH-TiO2OH-N50nm[4]TiO230nm10nm45%2.2TiO2TiO2TiO2TiO2TiO2[5]TiO2TiO2TiO2PEG4007%TiO2TiO22.3pHTiO2[6]H2O2UV/TiO2UV/H2O2TiO2-Fenton,[7-8]TiO2FentonTiO2Fe3+Fe3+FentonOHFe3+TiO2TiO22.4TiO2TiO2TiO22.5TiO22TiO2[9]TiO233.1TiO2[10]4mg/L100TiO2110mm20Wlh20mm70%TiO23.2TiO2TiO2[11]2h,TiO23.3TiO2TiO2TiO23.4CODTiO2COD250.0mg/L81.0mg/L86.050.0[12]3.5TiO2CO2TiO2(SDBS)[13]8.5nm500w5hCOD913.6[14]TiO2CO2H2O4TiO2TiO2TiO2TiO2[1]FujishimaAElectrochemicalphotolysisofwateratasemiconductorelectrode[J]nature19722383738[2].[M].:,20024[3].TiO2[J]200721(5)5457[4].TiO2J.200318(1)3942[5].TiO2J.200755760[6]CornishBJPALawtonLARobertsonPKJHydrogenperoxideenhancedphotocatalyticoxidationofmicrocystinLRusingtitaniumdioxide[J].AppliedCatalysisBEnvironmental2000255967[7].TiO2FentonJ.200114(11)13[8].TiO2J.200114(2)3335[9]VorontsovAVEvgueniNSClaudeLetalTiO2reactioninphotocatalyticdestructionofgaseousdiethylsulfideinacoilreactorJ.AppliedCatalysisBEnvironmental200244(1)2529[10][J]200618(3)58[11]TiO2[J]20045(6)[12][M]20082132l4[13]TiO2[J]20012(2)1420[14]VidalADiazArEl-hraikiAetalSolarphotocatalysisfordetoxificationanddisinfectionofcontaminatedwaterpilotplantstudies[J]CatalysisToday199954283290