A Review Study on photocatalytic activity of a series of modified zeolites in removal of dye contamination

A new class of supported photocatalysts is introduced with high activity under UV irradiation for the removal of dye contaminations. The composition comprises silicoaluminates (zeolite) as the support, TiO2 or Ti derivatives as the semiconductor, metal ion or metallocomplexes as the promoter of reaction or photosensitizer was used in the photocatalytic performance. From photocatalyst preparation point of view, the synthesis consists of the impregnation, isomorphous replacement and template synthesis method. The objective is to investigate two classes of the zeolites namely Na–Y and beta zeolite which have emerged as suitable supports for photocatalytic application which functionalized by metal ion or metallcomplexes to improve photocatalytic activity. The efficiency of catalysts was determined based on the amount of degradation of dye contamination. The effect of several parameters was investigated in the removal of dye. The kinetic of degradation suggested being pseudo-first order. Mineralization of wastewater was obtained by using COD analysis. All of catalysts showed a good efficiency in the removal and degradation of pollution.