Synthesis of TiO2-Carbon Nanotubes through ball-milling method for mineralization of oxamic acid (OMA) by photocatalytic ozonation

The OMA degradation is significantly more efficient in the presence of the milled composites containing synthesized TiO2 (SG) when compared to the composite prepared by the conventional procedure increased OMA removal from 40% to 70% after 30 min of reaction. The reaction rate constant of milled sample with original MWCNT (0.032 min−1) is considerably higher than observed with unmilled (0.012 min−1). A remarkable conversion is observed for all SG milled composites during the first 30 min of reaction and the presence of Fe is advantageous, since Fe can promote the O3 decomposition into HO radicals and surface reactions.