Crystal Structure, Thermal Behavior, and Photocatalytic Activity of NaBiO3·nH2O

The crystal structure of NaBiO3·nH2O was refined using synchrotron powder X-ray diffraction and was assigned to a trigonal unit cell (space group P3̅) consisting of layered structures formed by edge-sharing BiO6 octahedra and consisting of an interlayer composed of water molecules sandwiched between...

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Bibliographic Details
Published in:Inorganic chemistry 2018-08, Vol.57 (15), p.8903-8908
Main Authors: Saiduzzaman, Md, Yanagida, Sayaka, Takei, Takahiro, Kumada, Nobuhiro, Ogawa, Kazuya, Moriyoshi, Chikako, Kuroiwa, Yoshihiro, Kawaguchi, Shogo
Format: Article
Language:English
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Summary:The crystal structure of NaBiO3·nH2O was refined using synchrotron powder X-ray diffraction and was assigned to a trigonal unit cell (space group P3̅) consisting of layered structures formed by edge-sharing BiO6 octahedra and consisting of an interlayer composed of water molecules sandwiched between two layers of sodium atoms, perpendicular to the c axis. An intermediate phase was observed during the dehydration of the hydrated compound. Density of state calculations showed hybridization of the Bi 6s and O 2p orbitals at the bottom of the conduction bands for both the hydrated and the dehydrated phases, which narrows the band gap and promotes their photocatalytic activity in the visible region.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.8b00799