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Crystal structures of hydrothermally synthesized BiEuWO 6 and BiTbWO 6 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 Bi 2 WO 6 under visible light irradiation for Congo-red dye degradation. Particularly, BiTbWO 6 shows an enhanced photocatalytic (PC) activity compared to BiEuWO 6 , 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.

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

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