Photocatalytic degradation of rose Bengal by semiconducting zinc sulphide used as a photocatalyst

Abstract

Various semiconductors have been used as photocatalysts for removal of different dyes from their aqueous solutions. Zinc sulphide semiconductor is used in the present investigation as a photocatalyst for the removal of rose Bengal dye. Effect of different parameters, which affect the rate of reaction; like pH, concentration of dye, amount of semiconductor and light intensity have been studied. A mechanism has also been proposed in which hydroxyl radicals are shown as an active oxidizing species.

Keywords

• semiconductor
• photocatalyst
• Rose Bengal
• zinc sulphide
• hydroxyl radical