Influences of H2O2 on Degradation of Methyl Orange on TiO2 and Mixture of TiO2 and HZSM-5

Abstract

The effects of H2O2 addition to degradation efficiencies of TiO2 and the mixture of TiO2 and HZSM-5 were investigated. When H2O2 concentration increased from 2 mmol/l to 8 mmol/l, methyl orange decoloration rates increased from 41% up to 90%. TiO2 concentration was 100 mg/l and decoloration rates varied with increasing H2O2 concentration. Decoloration of methyl orange increased from 45.3% to 90.3% when H2O2 concentration increased from 2 mmol/l to 8 mmol/l. Total decoloration of the dye mainly came from oxidation of methyl orange by either oxidation of H2O2 and photocatalytic oxidation process. There was a maximum H2O2 concentration in methyl orange degradation when using mixture of TiO2 and HZSM-5.