Titanium oxide nanotubes (NTs) were synthesised using the electrochemical anodisation approach in a glycerol-based solution containing NH₄F at 10 volts. Pulse electrodeposition (PED) was applied to decorate the NTs with copper. The results reveal that the morphology of the porous nanotubes plays a significant role in the efficiency of photoelectrochemical water splitting. The highest photocurrent density obtained is 5.77 mA cm^-2 at 1.23 V vs. RHE for the annealed pure TiO₂ nanotubes (NTs) illuminated with a solar simulator under visible light (ʎ≥ 385 nm). The Cu doped TiO₂ nanotubes showed lower photocurrent density compared to the pure TiO₂ nanotubes (NTs) despite an increase in the carrier density (ND) concentration after Cu doping. The maximum photon conversion efficiency achieved is 1.1 % at 1.23 vs. RHE, which is the highest conversion efficiency ever reported under such conditions.