Abstract
TiO 2 films were successfully deposited onto hot quartz substrates by airbrush spraying using an aqueous dispersion. The films consisting of cubic or cauliflower-shaped structures expressed higher photodegradation efficiencies of methylene blue than those with prism-, flower- or fan-blade-shaped morphology due to the difference in the optical band gap energy. The photodegradation obeyed the pseudo-first-order Langmuir–Hinshelwood kinetic model with apparent rate constants ranging from 3.95 × 10 − 3 to 19.38 × 10 − 3 min − 1 based on the film surface morphology.
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