Photocatalyst TiO2 Loaded on an Activated Carbon Installed in Air Cleaner for Air Purification

TiO2 immobilized on glass fiber filter (TiO2 filter) and activated carbon filter (TiO2/AC) filter was installed in a commercial air cleaner and tested inside an environmental chamber. Common indoor air pollutants such as NOx and toluene were selected as target pollutant. Results showed that the air cleaner without the installation of TiO2 filter or TiO2/AC filter removed only very little target pollutants. Compared to the TiO2 filter, TiO2/AC filter not only achieved a higher NO removal but also significantly suppressed the intermediate NO2 generated from the photodegradation of NO. Likewise, the concentration of the target pollutant reached a photo-steady-state faster using the TiO2/AC filter than the TiO2 filter. The higher removal efficiency of using TiO2/AC is owing to the synergistic effect between the TiO2 and the activated carbon. The a

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