PENGARUH KONSENTRASI AWAL DAN PENAMBAHAN H2O2 TERHADAP EFEKTIVITAS DEGRADASI FOTOKATALISIS METHYLENE BLUE PADA FILM TiO2

Abstract

Photocatalytic degradation of methylene blue (MB) in water using TiO₂ film was investigated. TiO₂ film was coated on glass substrate by squeegee printing method. TiO₂ film has an anatase phase with crystallite size of 24.5 nm regarding to X-ray diffraction analysis result. Photocatalysis test was carried out in the static water bath containing Methylene Blue. TiO₂ film on glass substrate placed in water bath with MB dye solution was exposed with UV light source. The Effects of concentration and pH of MB solution and H₂O₂ addition were investigated. Degradation of MB showed an optimal result for MB concentration of 5 mM. Addition of H₂O₂ into water could also increase the photocatalytic degradation of MB up to 84.2% with a degradation rate of 0.01 minute^-1.