 This study investigates the potential of old dopedes, a TiO3 photocatalyst, loaded with IHCR203 and COOH-cocatalysts for the degradation of Congo red dye under UV and visible light irradiation. The results show that the prepared samples exhibit excellent photocatalytic activity and stability, which can be attributed to the presence of the cocatalysts. Furthermore, the photodegradation process involves the formation of hydroxyl radicals, which is further supported by the use of radical scavengers. This article was authored by M. Abdelkadiz, Ahmed M. El-Kawaga, Mawa Mohamed Abu Alayla, and others.