Abstract
CdS-based photocatalysts supported on MgO and γ-Al 2O 3 have been prepared, characterized and tested for dihydrogen evolution from a sulphide/sulphite substrate using a halogen lamp source. The effect of precursor salt for CdS preparation, the optimum loading of CdS on the support and the concentration of the catalyst in 50 ml of solution have been investigated. The effect of adding to CdS a semiconductor ZnS-Ag 2S and catalytic materials like Pt and RuO 2 have also been studied. The results obtained from the basic nature of MgO support are compared with the acidic nature of Al 2O 3 support. The importance of the acid-base properties of the support is substantiated by modifying the Al 2O 3 support with base materials like CaO BaO . Thus, the effect of the acid-base properties of the supports is highlighted.
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