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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1785| Synthesis, characterization and photocatalytic evaluation of potassium hexatitanate (K2Ti6O13) fibers | |
| María Azucena González Lozano VIRGINIA HIDALINA COLLINS MARTINEZ MIGUEL JESUS MELENDEZ ZARAGOZA MIGUEL ANGEL ESCOBEDO BRETADO | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| H2 production Photocatalysis | |
| Potassium hexatitanate have been scarcely studied as a photocalalytic material for the hydrogen production from water splitting. The aim of the present study is to synthetized and characterized K2Ti6O13 fibers in order to evaluate their photocatalytic activity towards the efficient production of hydrogen. Materials were characterized by XRD, BET, UV–Vis and SEM. The viability of obtaining K2Ti6O13 via the flux method using boric acid subjected to different melting temperatures and cooling media (air or water) was carried out. The amount of used flux enabled the production of a liquid phase in which the TiO2 and K2O reacted to form K2Ti6O13 with various morphologies, according to results. The melting temperature did not significantly influence the microstructure presented by the materials. Fibers were produced with sizes varying from 12 to 35 μm in length and 260 – 530 nm in diameter as well as with a specific surface area of 4.1 m2/g and 2.3 m2/g for a heat treatment at 900 °C (C21) and 1000 °C (C22), respectively. Band gap energies of these titanates fell within the electromagnetic spectrum from 3.2 eV for both samples. Maximum hydrogen production was achieved by (C21) with 2,387 μmolH2/gcat, while the lowest production was observed for sample (C22) with 1,538 μmolH2/gcat at 8 hours of irradiation. From these results the crystals of potassium hexatitanate exhibited high photocatalytic activity for water splitting and they can be considered as potential photocatalysts for H2 production. | |
| 2017 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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| Synthesis characterization and photocatalytic evaluation of potassium hexatitanate.pdf | 874.59 kB | Adobe PDF | Visualizar/Abrir |