A hydrothermal method was used to synthesize a porous NiCoP@rGO nanocomposite by hybridizing reduced graphene oxide (rGO) with nickel cobalt phosphide (NiCoP). XRD, Raman, FE-SEM, HRTEM, UV-VIS, and XPS analyses confirmed the structure, morphology, functional groups, and oxidation states of the material, showing that NiCoP nanoparticles adhered to the rGO surface. The photocatalyst was used to degrade Orange G and Eosin Yellow under UV irradiation. Key parameters such as pH, catalyst dosage, dye concentration, and electrolytes were optimized. NiCoP@rGO demonstrated superior photocatalytic efficiency compared to pristine NiCoP and maintained high performance after three reuse cycles. A Z-scheme mechanism enabled efficient electron–hole separation. The material shows significant potential for degradation of organic industrial pollutants. © 2025 Elsevier B.V., All rights reserved.