TiO2 AND TiO2/ACTIVE CARBON PHOTOCATALYSTS IMMOBILIZED ON TITANIUM PLATES

Abstract

Study of TiO₂ and TiO₂ active carbon photocatalyst was done. Immobilization was carried out by sol-gel process using titanium diisopropokside bis-acetylacetonato as titanium precursor. The catalyst was characterized using XRD and SEM. The activity of catalyst was tested using 10 ppm of pentachlorophenol (PCP) as a model of organic waste. The test was done by irradiating PCP solution using UV lamp and varying the catalysts of TiO₂, and TiO₂/C of 8/2 and 5/5. About 5 mL of sample was taken out at interval time of 1, 2, 4, 6, 8 and 10 h iradiation followed by the measurement of PCP residue and chloride ions. From the characterization results it is known that calcined TiO₂ andTiO₂/C of 8/2 and 5/5 have anatase structure and active as a catalyst. The activity results using PCP as an organic waste showed that combination of TiO₂ and active carbon would increase the activity of the catalyst, but at high percentage of active carbon the performance of the photocatalyst decreased.