The FTO glasses were ultrasonically washed by the diluted HCl acid, ammonia, acetone, and ultra-pure water, sequentially.Finally, the washed FTO glasses were subjected to ca. 30 min ozone treatment. The areas of these TiO2 coatings on FTO glasses were 4 mm × 4 mm squares. The coatings were heated at 500◦C for ca.30 min to remove the organic substances.