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

Shanbogh, Pradeep P. and Raghunathan, Rajamani and Swain, Diptikanta and Feygenson, Mikhail and Neuefeind, Joerg and Plaisier, Jasper and Narayana, Chandrabhas and Rao, Ashok and Sundaram, Nalini G (2018) Impact of Average, Local, and Electronic Structure on Visible Light Photocatalysis in Novel BiREWO6 (RE = Eu and Tb) Nanomaterials. ACS Applied Materials & Interfaces, 10 (42). pp. 35876-35887. ISSN 1944-8244

[img] PDF
5253.pdf - Published Version
Restricted to Registered users only

Download (629kB) | Request a copy

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 timeresolved 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: Article
Uncontrolled Keywords: BiREWO6, Rietveld refinement, total scattering, DFT method, photocatalyst
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 26 Oct 2018 05:52
Last Modified: 26 Oct 2018 05:52
URI: http://eprints.manipal.edu/id/eprint/152182

Actions (login required)

View Item View Item