BIOMASS-BASED PHOTOCATALYSIS FOR WASTEWATER TREATMENT

• Main Author: Egiyawati, Candra
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48284
• Institution: Institut Teknologi Bandung

Photocatalytic oxidation is a technology to overcome pollution that can be applied to air and air purification. Among a variety of metal oxide semiconductors, TiO2 is a semiconductor that is often used for applications in the fields of catalysis, photovoltaics, optoelectronics, cleaning glass, and pigments. The basic principle of photocatalysis is the excitation of electrons in the valence band to the conduction band after being illuminated by UV light followed by the formation of very active radicals and as oxidizing pollutants. The TiO2 band gap energy of 3.2 eV was determined as an effective value for photocatalyst applications using UV light in photocatalytic relationships. In this research, materials used to support TiO2 are silica-based materials with high specification and high complexity to increase catalyst activity. One and the source of silica that can be used from bagasse biomass is abundant with high silica content. The composition of SiO2 in bagasse ash based on XRF test was 91.7% -mass. The photocatalytic activity of TiO2 / SiO2 in this study was tested in the degradation reaction of methyl orange, which was irradiated with UV light for 2 hours and obtained the optimal recovery rate constant of 0.0022 M-1 min-1 with a TiO2 / SiO2 catalyst ratio of 1: 3. The results of the photocatalytic performance of TiO2 / SiO2 have been proven to outperform the evonic performance of P25 TiO2.