Abstract
Photocatalytic production of solar hydrogen using CdS suspensions in aqueous solution containing Na 2 S-Na 2 SO 3 has been studied. CdS prepared from different sources show different photocatalytic activity towards generation of hydrogen. CdS alone as well as modified by doping materials such as Pt, Ag 2 S and Si and mixing with ZnS has been investigated. When unmodified CdS is mixed with ZnS, the photocatalytic efficiency of CdS is enhanced and becomes maximum at a particular composition. When CdS is doped, the efficiency increases and in each case the best result is obtained at different particular composition.
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