The Photo-Catalytic Mechanism for Formaldehyde by Carbonized TiO₂-Woody Composites

Abstract

The photo-catalytic mechanism of the TiO₂ crystallites was studied for formaldehyde adsorbed in the carbonized TiO₂-woody composites. To do so, the effects of the presence of oxygen and/or water were investigated on photo-catalytic activities of the composites. As a result, it became clear that photo-catalysis of the carbonized TiO₂-woody composites requires water to decompose formaldehyde into CO₂. However, the oxygen is not essential for its decomposition. Based on this requirement, the photo-catalytic mechanism of the TiO₂ crystallites was discussed for adsorbed formaldehyde in the carbonized TiO₂-woody composites.