2002 Volume 70 Issue 6 Pages 460-462
SrTiO3 photocatalyst was combined with an energy storage material, WO3, to fabricate a new photocatalysis system, envisaging application to, e.g., protection of metals from corrosion. The SrTiO3-WO3 composite system stores reductive energy under UV irradiation, as does the TiO2-WO3 system. Since SrTiO3 exhibits more negative photopotential (ca. −0.5 V vs Ag | AgCl) than TiO2 (ca. −0.4 V), the SrTiO3-WO3 system can be charged more rapidly. In addition, self-discharging of the SrTiO3-WO3 system on the basis of aerobic re-oxidation of the system is slower than that of the TiO2-WO3 system.
