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Role of Coprecipitated NiS-ZnS in Photocatalytic Degradation of Alizarin Red S

Vijaya Sharma, Neelam Gandhi, Ankur Khant and R. C. Khandelwal

NiS-ZnS in molar ratio 1 : 2 was prepared using coprecipitation method. It photocatalytic activity was evaluated using alizarin red S as a model dye. The dependence of the rate of degradation on the amount of catalyst, pH, concentration of dye and light intensity has been studied. A comparative study on the photocatalytic activities of NiS-ZnS with pure ZnS was also made. A tentative mechanism for the photocatalytic degradation of alizarin red S has also been proposed.