engleski

Ba-modified TiO2 nanotubes for photo-catalytic degradation of diclofenac under UV/Vis radiation

A novel low-cost synthesis of barium modified TiO2 nanotube (TNT) arrays was used to obtain an immobilised photocatalyst for degradation of diclofenac. TNT arrays were prepared by electrochemical anodization of titanium thin films deposited on glass by magnetron sputtering. The Ba-modifications were obtained by annealing solutions of Ba(OH)2 (3 different concentrations) spin coated on top of TNT. Ba-modified TNT were tested for photocatalytic degradation of diclofenac under UV/Vis radiation and it was proven that all of the Ba-modified samples showed an increase in photocatalytic activity in respect to the unmodified TNTs. The most efficient photocatalyst was obtained with 25 mM Ba(OH)2 and showed 90% diclofenac degradation after 60 min. This result was in agreement with cyclic voltammetry measurements that showed the largest increase in photo-oxidation current densities for that sample.

Ba-modified TiO2 nanotubes ; photocatalysis ; diclofenac degradation

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