Photocatalytic degradation of naphthol ASBS dye over TiO2-based catalysts

The photo-assisted degradation of naphthol ASBS dye has been carried out us ing a batch reactor. TiO2, bare and immobilized over ceramic beads, metal i on doped Samples of silver, copper, tin and montmorillonite clay on titaniu m dioxide have been used for the degradation studies. The investigations we re made on the basis of the chemical oxygen demand (COD), total organic car bon (TOC), UV-visible absorption and reflectance spectroscopy measurements. The focus of the study is on the prospects of photocatalytic dye degradati on methods which provide a new approach for the treatment of dye pollutants in waste water.