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Molybdophosphoric acid encapsulated into dealuminated zeolite Y (DAZY) was prepared by template synthesis method. Incorporation of TiO2 into nanocage of DAZY was performed by impregnation method. The obtained photo catalyst (HPA/TiO2/DAZY) was characterized by FT-IR, UV–Vis, FESEM, XRD, EDS and ICP technique. This catalytic system was investigated in the photodegradation of methyl orange. The obtained results reveal that the photo catalyst performance depends to photo catalyst loading and TiO2/(HPA/HY) ratio. The photocatalytic activity of molybdophosphoric acid encapsulated into zeolite cage enhanced with impregnation of TiO2 into nanocage of dealuminated Y zeolite so that complete removal of methyl orange was occurred.