The Fe-Cr codoped TiO_2 nanosphere was synthesized with titanium butoxide,Fe(Ⅲ) nitrate nonahydrate,Cr(Ⅲ) nitrate nonahydrate by a modified sol-gel method. The crystal structure,morphology and optical absorption property of as-prepared nanosphere were characterized. And the photocatalytic hydrogen evolution was performed under UV-visible light illumination. The results indicated that the Fe-Cr codoped TiO_2 nanosphere has the best photocatalytic hydrogen evolution activity(133.6 μmol/(g·h)) and also exhibit...