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http://cio.repositorioinstitucional.mx/jspui/handle/1002/1020| Photocatalytic Activity of LaSr2AlO5:Eu Ceramic Powders | |
| LUIS ARMANDO DIAZ TORRES | |
| En Embargo | |
| 01-03-2020 | |
| Atribución-NoComercial-SinDerivadas | |
| The photocatalytic activity, of undoped and Europium‐doped LaSr2AlO5 powders, has been investigated by degrading methylene blue dye in water solutions. Those powders were fabricated by a combustion method and an annealing treatment in air. All samples showed a tetragonal single phase according to by X‐ray diffraction measurements (XRD). Scanning electron microscopy (SEM) revealed irregular semi‐oval grains with sizes in the range of 3.5–4.27 μm. Photoluminescence spectrum showed sharp emission peaks at 588 nm and at 617 nm which are associated with 7F1,7F2→ 5D0 Eu3+ ion forbidden transitions, respectively, under UV light excitation of 322 nm. The methylene blue (MB) degradation under UV light (254 nm) was studied by monitoring changes in the absorbance peak of MB at 665 nm. Finally, LaSr2AlO5:Eu powders were used three times and the efficiency for the degradation of MB decreased from 100 to 61% after the third cycle of use. | |
| 03-02-2015 | |
| Artículo | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Aparece en las colecciones: | Articulos Arbitrados 2015 |