The physical properties and photoelectrochemical characterization of the spinel ZnFe2O4, elaborated by chemical route, have been investigated for the hydrogen production under visible light. The forbidden band is found to be 1.92 eV and the transition is indirectly allowed. The electrical...

Photocatalytic H2-production has been observed over FeCr2O4, synthesized from Cr(NO3)3 and Fe(NO3)3. The oxide crystallizes in the normal spinel structure and the transport properties exhibit p-type conductivity ascribed to metal deficiency. An optical gap of 1.33 eV is determined from the...

The chloride oxidation is successfully carried out on CuCrO2/WO3 (1/1) dispersed in air-equilibrated KCl solution. The delafossite CuCrO2 is p type semiconductor characterized by an optical gap of 1.28 eV, properly matched to the sun spectrum, and a chemical stability over the whole pH range....

The photocatalytic ability of CuM2O4 (M=Al, Cr, Mn, Fe and Co) crystallizing with spinel-type structure has been evaluated according to the H2-evolution. The oxides are black and displayed a semiconducting behavior where the electronic balance comes from a small over stochiometry (CuCo2O4.016)....