Carbon dots decorated three-dimensionally ordered macroporous bismuth-doped titanium dioxide with efficient charge separation for high performance photocatalysis.

Fast recombination of photo-generated carriers and limited photo-response have greatly hindered the development of TiO-based photocatalysts. Herein, we present a ternary three-dimensionally ordered macroporous (3DOM) carbon dots (CDs)/Bi:TiO photocatalyst, which affords well-designed charge transmission and allows broad-spectrum absorption, thus delivering enhanced photocatalytic performance. The carbon dots act as effective electron extractors to accelerate the separation of electron-hole pairs, and pore engineering of the 3DOM Bi:TiO skeleton greatly promotes the response of light in the whole solar spectrum range.