Photocatalytic degradation of gaseous pollutants on nanostructured TiO films of various thickness and surface area.

This work deals with the preparation of TiO nanoparticulate layers of various mass (0.05 mg/cm to 2 mg/cm) from three commercial nanopowder materials, P90, P25 and CG 300, their characterisation (profilometry, BET and SEM) and evaluation of their photocatalytic activity in the gaseous phase in a flow-through photoreactor according to the ISO standard (ISO 22197-2). Hexane was chosen as a single model pollutant and a mixture of four compounds, namely acetaldehyde, acetone, heptane and toluene was used for the evaluation of the efficiency of simultaneous removal of several pollutants.