Nitrogen-doped yellowish rutile titania prepared by high energy ball milling of P-25 titania-5% HMT (Hexamethylenetetramine, C6H12N4) mixed powders followed by calcination in air at 400degreesC possessed two absorption edges around 400 and 540 nm and showed excellent photocatalytic ability for nitrogen monoxide oxidization under irradiation of the visible light of wavelength > 510 nm.