Performance of Aluminum Materials as a Photocatalyst Support for Air Purification

抄録

To explore the possibility of aluminum (Al) materials as a support, titanium dioxide (TiO₂) was immobilized on aluminum Al foil sheets and tubes and acetaldehyde (AA) and toluene were photocatalytically decomposed. The photocatalyst immobilized on the Al foil sheet provided the highest activity at a drying temperature of 400 °C. This is mainly due to a fact that organic compounds accumulated in an electric dryer hardly adsorb on a TiO₂ film in the drying process. Both the photocatalysts immobilized on the Al foil sheet and tube quickly decomposed AA and toluene to below the measurement limits of a gas chromatograph (30 and 40 ppb, respectively). Moreover, simulations on the photocatalytic decomposition of AA indicated that in the 40 m³-room under a constant release of AA from the wall, the steady-state concentration of AA certainly becomes less than the indoor-air guideline of AA if twelve reaction tubes are used. In conclusion, the Al materials can effectively be used as a support of TiO₂.