The photocatalytic technology was applied to reduce formaldehyde. A photocatalytic filter used is made of the porous ceramics, is coated with TiO2 and has a three-dimensional structure. The experiment to reduce formaldehyde in the air was conducted by circulating the air through the filter irradiated with UV light in a 1m3 air chamber. The result showed that the formaldehyde was almost completely oxidized into carbon dioxide when the intensity of UV light is over 2.9mW/cm2. The removal performance of formaldehyde was improved as the intensity of UV light increased or as one more photocatalytic unit or two were set in series.
展开▼
