Study on Degradation Conditions of Methylene Blue by La-TiO2/Hβ

The composite photocatalyst La-TiO2/H beta was prepared by coprecipitation method, the methylene blue (MB) was used as the target pollutant and the influence factors of degradating MB by La-TiO2/H beta were discussed. The results showed that the optimum conditions were that the initial mass concentration of MB was 20mg/L, the illumination time was 30 min, the dosage of oxidant H2O2 was 2.0mL, the catalyst dosage was 2.4g/L. Under these conditions, the degradation rate of MB by La-TiO2/H beta was up to 98.2%, the catalytic activity of the catalyst was unchanged after using three times.