ChemInform Abstract: Photocatalytic Properties of KBiO₃ and LiBiO₃ with Tunnel Structures.

Abstract

. -KBiO 3 is synthesized by oxidation of Bi2O3 with Br2 in 50% aq. KOH (reflux). LiBiO3 is hydrothermally prepared from aqueous solution of NaBiO3 and LiOH (autoclave, 120°C, 2 d). The samples are characterized by powder XRD, SEM, and UV/VIS diffuse reflectance spectroscopy. KBiO3 crystallizes with a cubic tunnel structure and LiBiO3 crystallizes with an orthorhombic tunnel structure. The band gaps of 2.1 and 1.8 eV for KBiO3 and LiBiO3, respectively suggest that these materials can be used as photocatalysts. The photocatalytic activities of KBiO3 and LiBiO3 are determined for the degradation of anionic and cationic dyes, respectively, under UV and solar irradiation.