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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1167| Preparation of rhodium nano-particles using microwaves | |
| FRANCISCO ESPINOSA MAGAÑA ERASTO ARMANDO ZARAGOZA CONTRERAS MARTHA TERESITA OCHOA LARA | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Sol-gel method SEM TGA | |
| new process for synthesizing rhodium (Rh) nano-particles by sol–gel processing using acrylamide and microwaves is reported and discussed. Three heat treatments were applied: the first required the use of microwaves, with an inert gas (Ar) flux, to decompose the organic material; the second and third treatments, respectively, were carried out into a furnace in air at temperatures of 600 and 1,000 °C. This procedure ensured the removal of by-products produced during the sol–gel reaction. The synthesis of a pure nano-Rh was confirmed by X-ray diffraction (XRD), where the presence of a cubic structure was observed (PDF file 089-7383), and EDX. Thermogravimetric analysis (TGA), in addition to determining the decomposition temperatures, enabled the heat treatment conditions needed to obtain pure nano- Rh to be elucidated. Furthermore, the morphology was observed with a scanning electron microscope (SEM). After the heat treatment at 1,000 °C, SEM images showed grain sizes between 3 and 200 nm. High-resolution transmission electron microscopy (HRTEM) confirmed the production of those nano- particles, and the beginning of the formation of clusters as a consequence of the high temperature applied to the system. | |
| 2012 | |
| Artículo | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos |
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