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Structural study, photoluminescence, and photocatalytic activity of semiconducting BaZrO3:Bi nanocrystals |
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| Authors: | R. Borja-UrbyL.A. Dí az-Torres,P. SalasE. Moctezuma,M. VegaC. Á ngeles-Chá vez |
| Affiliation: | a Grupo de Espectroscopia de Materiales Avanzados y Nanoestructurados (EMANA), Centro de Investigaciones en Optica A.C., León, Gto 37150, Mexico b Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, A.P. 1-1010, Querétaro 76000, Mexico c Facultad de Ciencias Químicas, Universidad Autónoma de San Luís Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., México 78290, Mexico d Centro de Geociencias-UNAM, A.P. 1-1010, Querétaro 76000, Mexico e Instituto Mexicano del Petróleo, Ciudad de México, D.F. 07730, Mexico |
| Abstract: | Wide band gap nanocrystalline bismuth doped barium zirconate is synthesized by a facile hydrothermal method at 100 °C. The obtained cubic perovskites are characterized by powder X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy, and photocatalytic activity. The estimated band gap in the 2.4-4.9 eV range, depending on Bi concentration, suggests nanocrystalline BaZrO3:Bi as a useful visible-light activated photocatalyst under excitation wavelengths <800 nm. Displacement of main XRD pattern peaks suggest that bismuth ion mostly substitutes into Zr4+ sites within the BaZrO3 host lattice. It is found that BaZrO3:Bi decomposes methylene blue (MB) under both UV and visible light irradiation. The photocatalyst efficiency depends strongly on Bi content and induced defects. |
| Keywords: | Photocatalyst Barium zirconate Bismuth Nanocrystals |
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