With the aim of creating a stable and homogeneous coating, many different parameters were investigated until the final coating method was found. Firstly, different dispersion types and dispersion times were tested for the best possible mixing of the coating suspension containing the photocatalyst material. Then, for dip coating different drawing speeds were considered. finally, different titanium dioxide concentrations were used. For the characterization of the materials and coatings, different methods were used, such as Raman and UV-Vis spectroscopy. The results of these preliminary tests can be found in the supporting information.