NOVELTY - Preparing titania nanorods for dye-sensitized or quantum dot nanoparticle-sensitized solar cells comprises preparing aqueous titanium oxychloride solution from titanium tetrachloride; preparing titanium oxyhydroxide precipitate with controlled particle size and shape via pH adjustment, control of reaction rate and heat treatment; and adding hydrogen peroxide and water to titanium oxyhydroxide and heating the mixture.    USE - Process for preparing titania nanorods for dye-sensitized or quantum dot nanoparticle-sensitized solar cells (claimed).    ADVANTAGE - The process prepares titania nanorods of anatase structure having rod-shape with longer dimension in one direction by using pure hydrogen peroxide without adding surfactant or templates. The titania nanorods have less intergranular defection as compared to photoelectrodes achieved by connection of ball-type particles, so that the nanorods have excellent property of transferring photoelectric current generated by dye or quantum dot nanoparticles.    DETAILED DESCRIPTION - Preparing titania nanorods for dye-sensitized or quantum dot nanoparticle-sensitized solar cells comprises    (A) slowly dropwise adding chilled distilled water to titanium tetrachloride (TiCl4) to prepare solution of titanium oxychloride (TiOCl2);    (B) adding basic solution to maintain pH of the titanium oxychloride solution within 3.5-4 to provide a suspension of titanium oxyhydroxide (TiO(OH)2) precipitate;    (C) adding basic solution to adjust the suspension to be weakly basic and heating and stirring the mixture at 80-100 degrees C;    (D) isolating and collecting titanium oxyhydroxide from the heated and stirred suspension and washing with weakly basic aqueous solution; and    (E) adding distilled water and 20-500 folds hydrogen peroxide based on 1 mole tetravalent titanium (Ti4+) in titanium oxyhydroxide to the washed titanium oxyhydroxide and heat-treating the mixture at 90-100 degrees C for 1-7 days to prepare titania nanorods having mean length of 100-300 nm.