Preparation of black-titanium dioxide nanotubes by thermal decomposition of sodium borohydride

Titanium dioxide is a very attractive material in catalysis. Although the titanium exhibits superior proper-ties ultra violet radiation, activity of catalyst can be improved by some modifications specially for daylight radiation. was colored thermal decomposition sodium borohydride at 400 0C. The gray nanotube-titanium obtained where molar ratio to borohydride, 1.2 and 0.6. black prepared making 0.3. While heterogeneous dispersion observed after coloring commercial dioxide, all photocatalysts from were perfectly homogeneous coloring. Structural properties analysed using XRD, BET SEM. nanotube form hydrothermal method. are anatase have high surface area. activities nanotubes investigated according these structural properties. Photocatalysts could not homogeneously with hydrogen reduction process but efficient coloration borohydride. visible region increased compared hydrogen. structure important, exhibited more color removal yield regard one. More active catalysts absorption energy 98.4 % 30 ppm methylene blue solution photocatalyst.