Abstract
Adsorption and photocatalytic decomposition of dimethyl sulfide (DMS) by a new type silica bead coated with TiO2 (TiO2/SiO2 bead) were investigated. It was found that titanium existed as TiO2 (anatase form) on the surface of the silica bead. Specific surface area of the bead was 391 m2·g-1 and adsorption efficiency of the bead was superier to commercial TiO2 grain for gaseous DMS. Photocatalytic decomposition by the bead was 65% for 33.5 h-1 of space velocity (SV).Reaction products detected after photocatalytic decomposition of DMS by the TiO2/SiO2 bead under ultraviolet light were dimethyl disulfide, SO2, SO42- ion and acetic acid. Thus, it is recognized that oxidative decomposition mainly proceed in the photocatalytic reaction.
