The degradation experiments were performed with a catalyst loading of 1 g/L. UV-A light was chosen as the irradiation source due to TiO₂'s high efficiency in absorbing UV light. The baseline performance of bare TiO₂ was assessed alongside the tri-doped variants to establish comparative insights. TiO₂, known for its excellent photocatalytic activity under UV light, served as a benchmark due to its nearly 100% degradation efficiency across all studied CIP concentrations.