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The TiO2 nanoparticles were prepared using the sol-gel method, with an average particle size of 18.56 nm, and high uniformity from the common precursors. TiO2 nanotubes have been made from prepared TiO2 nanoparticles by hydrothermal route, which exhibited a high porosity, with an average diameter of 7.56 nm, and a length of approximately of 500 nm. For the characterization of the catalyst properties, the techniques of X-ray Diffraction (DRX), Fourier-Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM) were used. The TiO2 nanotube photocatalysts exhibited better photocatalytic activity than TiO2 nanoparticles in the removal of methylene blue (MB) dye under natural sunlight irradiation as well as filament lamp as the light source in the laboratory condition. The results show that as-prepared TiO2 nanotubes have exhibited the highest photocatalytic activity in the process of photocatalytic degradation of MB dye, and its degradation efficiency is 74.45% when illuminated by sunlight, including UV radiation, after 120 min treatment. These results lay the groundwork for extending the application of TiO2 materials in enhancing the photocatalytic degradation of dyes like Rhodamine B, Crystal Violet, Acid Blue, and other Persistent Organic Pollutants (POPs) when combined with cerium oxide (CeO2) and graphitic carbon nitride (g-C3N4) in future studies.