EFFECT OF CADMIUM-SULFIDE CHARACTERISTICS ON THE PHOTOCATALYTIC OXIDATION OF THIOACETAMIDE

The variation in photocatalytic oxidation rate of thioacetamide was examined by using cadmium sulfide obtained from five sources. These results as well as analogous data obtained by using thiourea, and the effect of pH and temperature suggest that the observed activity variations result from catalyst properties alone. On a mass basis, the most reactive photocatalysts are those with the largest specific surface area. However, on a surface area basis, the purity of the electronic grade compounds is essential for the most efficient reaction. Thermal treatment of the CdS increases photocatalytic activity as long as specific surface area is not detrimentally affected.