Photocatalytic Degradation of Acetone by Titanium Dioxide and Iron-Doped Titanium Dioxide Nanotubes Photocatalysts

摘要

The effect of key experimental parameters on the removal of acetone under 365 nm irradiation was investigated using a bench-top, photocatalytic flow reactor. Acetone was introduced at concentrations between 250 and 1000 ppm and reacted on titanium dioxide (TiO_2) and iron-doped TiO_2 nanotubes. Two different TiO_2 nanotubes were prepared by dip-coating using a P25 aqueous suspension and using a hydrothermal method that produced thin films of mesoporous anatase. Flow rates in the photoreactor varied between 250 mL min~(-1) and 1000 mL min~(-1), leading to residence times, ?, in the range 1 min< ? < 4 min. It is cleared that the maximum removal of acetone is attained using UV 365 nm, followed by LED 365 and LED visible lights. Experiments were carried out between 4% and 45% relative humidity (RH). Conversion of acetone was as high as 85%, and an optimal humidity of 35% was observed for the TiO_2/LED365 process under experimental conditions.