Abstract: A non-aqueous composition for forming doped TiO2 nanoparticles, comprising: i. a polar solvent comprising an organic compound having one or more oxygen atoms in its chemical structure, ii. a titanium(IV) halide, and iii. a dopant precursor selected from transition metal halides and lanthanide halides.

Abstract: A non-aqueous composition for forming doped TiO2 nanoparticles, comprising: i. a polar solvent comprising an organic compound having one or more oxygen atoms in its chemical structure, ii. a titanium(IV) halide, and iii. a dopant precursor selected from transition metal halides and lanthanide halides.

Abstract: A method for making a solution for forming a titanium oxide sol-gel layer. Is provided. The method comprises the steps of: mixing an acid with water thereby obtaining a first mixture, mixing the first mixture with a water miscible alcohol, thereby obtaining a second mixture, mixing an amine compound, e.g., ethanolamine, to the second mixture, thereby obtaining a third mixture, waiting enough time for the third mixture to reach room temperature, e.g. from 10 to 15 minutes, and adding a titanium oxide precursor to the third mixture, thereby obtaining the solution.