Modification of photocatalytic activity of antimony(III) sulphide in presence of sodium bicarbonate/ carbonate

A comparative study of photocatalytic bleaching of azure-B over Sb 2 S 3 powder was carried out in the presence and absence of sodium bicarbonate/carbonate. The photocatalytic bleaching was observed to be more efficient inthe presence of bicarbonate/carbonate ions. The effect of various parameters has been studied and a tentative mechanism for the photocatalytic bleaching has been proposed.