Potassium and strontium niobate (KSr 2 Nb 5 O 15 ) of tungsten structure (TB) bronze was doped with nickel (Ni2+) with stoichiometry type KSr 2 Ni x Nb 5-x O 15-δ onde x = 0,25; 0,50 and 0,75. The powders were prepared by chemical synthesis using the modified Polyol method, and characterized by infrared spectroscopy with Fourier transform (FT-IR), by X-ray diffraction (XRD), including the network parameters (relative intensity -I R(KSNNi0,50) ˃ I R(KSNNI0,25) ˃ I R(KSNNI0,75) ) and crystallite size. The effects of doping (Ni2+) in the process of photo degradation were studied, the absorbance as a function of time for the Basic Blue dye 41 result from the photo degradation performed with the photo catalyst KSNNi0,50 presented a lower absorbance value, and the spectrophotometer was used in the UV-vis region. The efficiency and kinetics of better photo catalytic degradation of Basic Blue 41 by catalysts KSr 2 Ni x Nb 5-x O 15-δ where x = 0,25; 0,50 and 0,75 was the system KSr 2 Ni x Nb 5-x O 15-δ where x = 0,50 which was discussed.