Preparation of a transparent thin-film photocatalyst for elimination of VOC
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A transparent and highly porous thin-film photocatalyst was prepared using the dipcoating method with the thermal decomposition of titanium alkoxide complex. The photocatalyst film obtained was formed with aggregated nano-sized TiO2 single anatase crystals, and this film had a large surface area. Film thickness was 0.2–4.4 μm. A thick film (about 4.4 μm thickness) was also transparent. The average specific surface area of the film was ca. 70 m2/g. The crystalline phase of TiO2 was anatase alone for calcinations over 400°C. The photocatalytic ability of the films was almost equal to the same weight of P25 on coated glass plates. The films decomposed 100 ppm of toluene and p-xylene (using a 1-1 size batch-type photo-reactor).
KeywordsTiO2 transparent thin film photocatalyst VOC photodecomposition
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