Electrodeposited Platinum Nanoparticles on Highly Ordered Titanium Dioxide Nanotubes for Photocatalytic Application: Enhancement of Photocatalytic Degradation of Amido Black Dye

A self-organized TiO2 nanotubes were fabricated via anodization on Titanium substrate and loaded with dispersed platinum nanoparticles using electrodeposition method. The effect of electrodeposited Pt NPs (100 s, 200 s, 300 s, 600 s) on TiO2 nanotubes on their photocatalytic activities for amido black (AB) dye degradation was studied. Morphological characterizations showed a highly ordered nanotubular TiO2 structure with 15 μm of length and 100 nm of diameter using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) technics. Optical characterizations such as photoluminescence and diffuse reflectance spectroscopy proved the charges exchange between metal NPs and the semiconductor. The successful depositions of Pt on to the surface of TiO2-NTs contributed for the improved photocatalytic activity compared to the pure sample, due to the greater the work function of platinum nanoparticle, which further anchored the separation of photogenerated electron–hole pairs. It was found that the sample Pt/TiO2-NTs with 200 s of Pt deposition time offered the highest photocatalytic performance, this sample resulted 97