Vol. 2, Issue 12, Part I (2016)

The photo catalytic reaction of bromo cresol purple on zinc oxide powder was carried out. Photocatalytic bleaching of the dye was observed spectrophotometrically. The effects of the variation of various parameter such as the concentration of bromocresol purple, pH, amount and particle size of semiconductor and light intensity on the rate of photocatalytic bleaching were observed. A tentative mechanism for the reaction has been proposed.