For the Scientist in You
This study investigated the preparation and characterization of TiO2 nanoparticulate layers from three commercial nanopowders, their photocatalytic activity in removing pollutants, and the efficiency of simultaneous removal of several pollutants.
The study found a linear relationship between layer mass and thickness, and that higher layer masses resulted in decreased BET surface area.
The photocatalytic conversion of hexane was comparable for all immobilized powders up to a layer mass of 0.5 mg/cm2, but differed for higher layer masses, with P90 achieving 30% higher conversion than P25.
In simultaneous degradation of four compounds, acetaldehyde was degraded best, followed by acetone and toluene, while heptane was the least degraded.
The study also found that 90% of degraded hexane was mineralized to CO2 and water, while for a mixture of four VOCs, the level of mineralization was 83%.