No abstract

Ferroelectric lead zirconate titanate (PZT) ceramics with the polarization vector defined perpendicular to surface were employed, with and without Pt deposition, as photocatalysts for water decomposition under conditions in which either the positive or negative polar surface was irradiated with Xe light. The activity of H2 formation was 10-40 times higher for the positive than for the negative polar surface. It was shown that PZT is a useful photocatalyst and the activity differences between the oppositely polarized surfaces are associated with the inherent anomalous photovoltatic effects of the ferroelectrics.

No abstract

No abstract

Size of colloidal CdS particles in aqueous medium was controlled by adding thiols in the procedure of the preparation. The change in optical absorption spectra and the quantum yield of photoinduced electron transfer were measured for these size-controlled CdS colloids.