Reduced graphene oxide (RGO) and Ag nanoparticles were incorporated simultaneously with two-step anodic TiO 2 nanotube through anodization process, and their photocatalytic activity was investigated in the degradation of 2,4-dichlorophenol (2,4-DCP). Furthermore, the optical properties and photocatalytic degradation efficiency were examined as a function of Ag NPs concentration in Ag/RGO-TiO 2 nanotube. Morphological characterization showed that Ag NPs and RGO sheets were well-doped inside and outside the TiO 2 nanotubes' walls. Meanwhile, X-ray diffraction and EDX analysis confirmed the existence of both Ag NPs and RGO. The optical investigation revealed that the incorporation of Ag NPs and RGO with TiO 2 nanotubes improved the light absorbance and the narrowing of TNT bandgap energy (from 2.85 to 2.35 eV). Therefore, among the various samples, Ag50/RGO-TNTs photocatalyst had the most optimal performance, degrading 96% and 66% of 2,4-DCP under UV and visible light irradiation, respectively. The kinetic study confirmed that degradation reactions over all photocatalysts followed zero-order kinetics. Finally, the recovery test of the optimum sample (Ag50/RGO-TNT) showed 6% reduction following 5-cycle photocatalytic degradation of 2,4-DCP under UV irradiation. Keywords Anodic nanotube • Ag nanoparticles • RGO • Photocatalytic degradation List of symbols UV Ultra-violet radiation v Anodization voltage (V) D Mean crystalline size of TiO 2 V Cell volume of TiO 2 d Interplanar spacing E g Energy of band gap h Planck's constant K Scherrer constant C Concentration of pollutant (ppm) C 0 Initial concentration of pollutant (ppm) t Photocatalytic degradation time (min) k abs Apparent rate constant (ppm/min) R 2 Correlation coefficient Greek symbols α Absorption coefficient ϑ Frequency of vibration Subscripts h, k, l Miller coordinates * Neda Gilani