Decomposition of Organic Compounds over NaBiO₃ under Visible Light Irradiation

Abstract

We investigated photophysical and photooxidation properties of NaBiO 3 containing Bi (V) for the first time. The optical absorption of NaBiO 3 was characterized by the sharp decrease at about 470 nm followed by the long tail up to 600 nm. The photooxidation activity evaluated from the decomposition of gaseous 2-propanol and methylene blue (MB) dye in the liquid phase revealed that NaBiO 3 is a prominent material for photooxidation of organics in the range of visible light. In addition, we calculated the electronic structures of bulk NaBiO 3 in the framework of density functional theory (DFT). As a result, strong dispersion from the hybridized Na 3s and O 2p orbitals that was identified at the bottom of the conduction band (CB) was considered to contribute to the high activity of this material.