Por favor, use este identificador para citar o enlazar este ítem:
http://cimav.repositorioinstitucional.mx/jspui/handle/1004/2551| 10.4 Synthesis of MFe2O4 nanoparticles by the Oil-in-Water microemulsion reaction method and its exploration for photocatalytic water splitting | |
| ARTURO ADRIAN RODRIGUEZ RODRIGUEZ Maira Berenice Moreno Trejo Alejandro López Ortíz Margarita Sánchez Domínguez | |
| Acceso Abierto | |
| Atribución-NoComercial | |
| ABSTRACT Spinel-type ferrites have the molecular formula MFe2O4, where M represents a divalent metallic cation, such as Co2+, Ni2+ and Zn2+ for CoFe2O4, NiFe2O4 and ZnFe2O4,respectively. As photocatalyst, spinel-type ferrites have shown an efficient visible light absorption, high sorption capacity, thermal stability, and low toxicity. Moreover its magnetic response allows their easy recovery from the liquid reaction media. Thanks to these features, MFe2O4 compounds are a promising option for the photocatalytic water-splitting, a clean and simple technology to obtain H2, which has not been fully explored for MFe2O4 nanoparticles, especially those synthesized by microemulsion. In light of this, we prepared cobalt, nickel and zinc ferrites employing the novel oil-in-water microemulsion reaction method and explored its H2 evolution through water splitting reaction. In order to perform the photocatalytic experiments, a dispersion of nanoparticles in water (2% MeOH) was prepared inside a quartz tube reactor; this system was sealed, and then illuminated with a 250 W white mercurial lamp. H2 production was monitored by gas chromatography. Prior to photocatalytic evaluation, as-synthesized nanomaterials were thermally treated and characterized. Characterization results showed globular nanoparticles with a cubic spinel-type crystalline structure, adequate textural properties for photocatalytic applications and UV-visible light absorption. In regard to light-driven H2 production, the photoactivity of these oxides was successfully demonstrated; photocatalytic water splitting evaluation of ZnFe2O4 yielded a higher amount of hydrogen (354 μmolH2g-1) compared with Co2+ andNi2+ ferrites in an 8 h experiment. Broadly, this work represents a new contribution to the studies of spinel-type ferrites for the photocatalytic production of H2. | |
| 2017 | |
| Artículo | |
| Inglés | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| Synthesis of MFe2O4 nanoparticles by the Oil-in-Water.pdf | 1.32 MB | Adobe PDF | Visualizar/Abrir |