Bismuth chromate (Cr 2 Bi 3 O 11 ): a new bismuth-based semiconductor with excellent photocatalytic activity.

A novel bismuth chromate material (Cr 2 Bi 3 O 11 ) was synthesized by a direct mixing method with higher photocatalytic activity in both organic pollutant detoxification and oxygen evolution. Cr 2 Bi 3 O 11 with a band gap of 2.20 eV could be activated by photons with a wavelength below 561 nm. This work not only provides an approach for the controllable synthesis of Cr 2 Bi 3 O 11 , but also experimentally and theoretically shows its excellence and potential when applied in photocatalysis.