Electropolymerization as a new route to g-C₃N₄ coatings on TiO₂ nanotubes for solar applications

Continuous coatings of graphitic carbon nitride (g-C₃N₄) are obtained on 3D conductive substrates, such as TiO₂ nanotubes, by a new and simple process consisting of melamine electropolymerization followed by heat treatment. According to TEM observations, coatings with a thickness of 2-3 nm are uniformly distributed on the surface of the TiO₂ nanotubes. The chemical nature of the films is identified by X-ray diffraction and a variety of spectroscopic methods. The properties of the coatings indicate possible solar applications.