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Photocatalytic properties of KBiO(3) and LiBiO(3) with tunnel structures

Ramachandran, Rajalakshmi and Sathiya, M and Ramesha, K and Prakash, AS and Madras, Giridhar and Shukla, AK (2011) Photocatalytic properties of KBiO(3) and LiBiO(3) with tunnel structures. In: Journal of Chemical Sciences, 123 (4). pp. 517-524.

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Abstract

In the present study, KBiO(3) is synthesized by a standard oxidation technique while LiBiO(3) is prepared by hydrothermal method. The synthesized catalysts are characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), BET surface area analysis and Diffuse Reflectance Spectroscopy (DRS). The XRD patterns suggest that KBiO(3) crystallizes in the cubic structure while LiBiO(3) crystallizes in orthorhombic structure and both of these adopt the tunnel structure. The SEM images reveal micron size polyhedral shaped KBiO(3) particles and rod-like or prismatic shape particles for LiBiO(3). The band gap is calculated from the diffuse reflectance spectrum and is found to be 2.1 eV and 1.8 eV for KBiO(3) and LiBiO(3), respectively. The band gap and the crystal structure data suggest that these materials can be used as photocatalysts. The photocatalytic activity of KBiO(3) and LiBiO(3) are evaluated for the degradation of anionic and cationic dyes, respectively, under UV and solar radiations.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: KBiO(3);LiBiO(3);synthesis;crystal structure;photocatalysis
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 15 Sep 2011 11:16
Last Modified: 15 Sep 2011 11:16
URI: http://eprints.iisc.ac.in/id/eprint/40463

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