The dispersion of TiO2 modified by the accumulation of CO2 molecules in water: An effective medium for photocatalytic H2 production

Abstract

The photocatalytic H₂ production from water with TiO₂ can be noticeably enhanced by the presence of both dense phase CO₂ and a surfactant of sodium dodecyl sulfate, being larger by more than one order of magnitude than that from water with TiO₂ alone. The surface of TiO₂ may be modified by the accumulation of CO₂ molecules assisted by the TiO₂- and CO₂-philic surfactant, changing its photocatalytic activity.