PHOTOCATALYTIC PROPERTIES OF LAYERED HYDROUS TITANIUM-OXIDE CDS-ZNS NANOCOMPOSITES INCORPORATING CDS-ZNS INTO THE INTERLAYER

H2Ti4O9/Cd0.8Zn0.2S nanocomposites incorporating Cd0.8Zn0.2S particles , less than 1 nm in thickness, were fabricated by the chemical reactio n between a Cd2+-Zn2+ mixture and H2S in the interlayer of H2Ti4O9. H Ti4O9/Cd0.8Zn0.2S nanocomposites were capable of efficient hydrogen ev olution following irradiation with visible light in the presence of Na 2S as a sacrificial donor. The hydrogen production activity of the H2T i4O9/Cd0.8Zn0.2S nanocomposite was superior to those of unsupported Cd 0.8Zn0.2S and the mixture of H2Ti4O9 and Cd0.8Zn0.2S. The hydrogen pro duction was enhanced by doping Pt together with Cd0.8Zn0.2S in the int erlayer, but was depressed by depositing Pt on the outer surface of th e H2Ti4O9/Cd0.8Zn0.2S nanocomposite.