The aim of the study was to carefully investigate influence of Nb
doping on photoactivity of TiO 2 in concentrations up to 1 at. %.
Twenty samples were synthesized and characterized by XRD,
SEM, EDX, BET, Raman and DR spectroscopy. Photoactivity
was evaluated as phenol degradation rate.
The main parameters: phase composition, particle size, BET area
and band gap remain the same. Nevertheless the dependence of
photoactivity on Nb concentration indicates presence of two
explicit maxima which is an issue for further investigations.