| Abstract
| - A TiO2 film was deposited onto alumite using an electrochemical technique, where the initial electrodepositionwas carried out by ac electrolysis in (NH4)2[TiO(C2O4)2] solution, followed by pulse electrolysis in TiCl3.This is a new method to prepare a mesoporous TiO2 photocatalyst film consisting of nanosized particles andto directly fix them onto the alumite substrate (Al/Al2O3). The sizes of the TiO2 particles in the prepared filmwere about 5 nm, and they consisted of mixtures of the anatase, rutile, and amorphous phases. This film hada high catalytic activity for the decomposition of acetaldehyde even under fluorescent lamp illumination.Moreover, the preparation cost is very low compared with other methods. Therefore, the prepared Al/Al2O3/TiO2 plate is very useful for the practical photodecomposition of chemical contaminants in the atmosphere.The mechanisms of the TiO2 deposition and the photocatalysis are discussed.
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