TiO2 thin films with varying Mn and Fe dopant levels (0.01-5.00 mol% metal basis; single cation doping and codoping) were deposited on soda-lime-silica glass substrates by spin coating, followed by annealing in air at 450 degrees C for 2 h. The mineralogical, morphological, optical, and photocatalytic properties of the thin films were determined. The fabricated films were similar to 250 nm thick and they were comprised of grains of similar to 20-30 nm size. Anatase (or amorphous titania) was the only phase in essentially all the films, with the dopants' being soluble in anatase. All of the films were transparent (similar to 80%) in the visible region and the optical indirect band gaps were similar to 3.4 eV. Photocatalytic testing (<= 24 h) showed that the extent of photodegradation decreased with increasing dopant levels. The 0.01 mol% Fe-doped sample showed the best photoacdvity since, at this doping level, the negative effects of electron/hole recombination and lattice distortion probably were minimal. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.