Impact of Average, Local, and Electronic Structure on Visible Light Photocatalysis in Novel BiREWO6 (RE = Eu and Tb) Nanomaterials

Shanbogh, PP and Raghunathan, R and Swain, D and Feygenson, M and Neuefeind, J and Plaisier, J and Narayana, C and Rao, A and Sundaram, NG (2018) Impact of Average, Local, and Electronic Structure on Visible Light Photocatalysis in Novel BiREWO6 (RE = Eu and Tb) Nanomaterials. In: ACS Applied Materials and Interfaces, 10 (42). pp. 35875-35887.

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Abstract

Crystal structures of hydrothermally synthesized BiEuWO6 and BiTbWO6 nanomaterials are deduced for the first time by combined Rietveld refinement of neutron and synchrotron data using the ordered and disordered models available in literature. The ordered model is validated for the average structure of these nanomaterials, and it is further supported by the local structure analysis using neutron pair distribution function. Nanomaterials are characterized by field-emission scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller surface area, diffused reflectance spectroscopy, and Raman Spectroscopy. Rare-earth-substituted nanomaterials are found to be efficient photocatalysts over the parent Bi2WO6 under visible light irradiation for Congo-red dye degradation. Particularly, BiTbWO6 shows an enhanced photocatalytic (PC) activity compared to BiEuWO6, as evidenced from the photoelectrochemical and time-resolved fluorescence studies. The difference in the observed PC activity of these nanomaterials is also explored through a detailed comparison of crystal structure and electronic structure calculated through the density functional theory method.

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Azo dyes; Bismuth compounds; Chromium compounds; Density functional theory; Distribution functions; Electronic structure; Europium; Europium compounds; Field emission microscopes; High resolution transmission electron microscopy; Light; Nanostructured materials; Photocatalysts; Photodegradation; Rare earths; Rietveld refinement; Scanning electron microscopy; Terbium compounds; Transmission electron microscopy, BiREWO6; Brunauer-emmett-teller surface areas; Density functional theory methods; DFT method; Field emission scanning electron microscopy; Pair distribution functions; Total scattering; Visible-light photocatalysis, Crystal structure
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Aug 2022 05:50
Last Modified:	05 Aug 2022 05:50
URI:	https://eprints.iisc.ac.in/id/eprint/75196

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