In TiO2 suspension photocatalytic reaction system with UV lamp radiation
characteristics of photocatalytic decolorization for dyes is investigated as model pollutions using reactive blue 4
acid red G and malachite green.The research results demonstrated that:(1) dyes absorption on TiO2 surface is one of the preconditions for the process of photocatalytic reaction
then dyes absorption efficiency is directly determined to photocatalytic reaction efficiency.(2)OHg is mainly provided by ions reaction of TiO2 surface cavity
dissolve O2 restrains mostly combination of electron cavity pairs
dyes are mainly photo-degradation by TiO2 surface cavity or OHg producing by cavity.