Nanostructured photocatalytic TiO2 films were prepared by sol–gel methods.
The addition of PEG to the TiO2 film changes the surface morphology and roughness parameters.
The addition of PEG to the initial sols increases photocatalytic properties of TiO2.
LGB water solution could be decolourised within 2 h.
The influence of photolysis and adsorption on the LGB removal from the solution is negligible.