Impact of Average, Local, and Electronic Structure on Visible Light Photocatalysis in Novel BiREWO6 (RE = Eu and Tb) Nanomaterials
| Autor: | Joerg C. Neuefeind, Ashok Rao, Jasper R. Plaisier, Nalini G. Sundaram, Diptikanta Swain, Pradeep P. Shanbogh, Chandrabhas Narayana, Rajamani Raghunathan, Mikhail Feygenson |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Rietveld refinement Nanotechnology 02 engineering and technology Electronic structure Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nanomaterials symbols.namesake Photocatalysis symbols General Materials Science Density functional theory 0210 nano-technology Raman spectroscopy Visible spectrum |
| Zdroj: | ACS Applied Materials & Interfaces. 10:35876-35887 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.8b08452 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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