Self-supported nickel nanoparticles on germanophosphate glasses : synthesis and applications in catalysis
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| Autor principal: | |
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| Data de publicació: | 2019 |
| Altres autors: | , , , , , , , |
| Format: | Article |
| Idioma: | eng |
| Font: | Repositório Institucional da UnB |
| Download full: | https://repositorio.unb.br/handle/10482/37043 |
Sumari: | The development of supported catalysts based on simple procedures without waste products and timeconsuming steps is highly desirable. In this paper, self-supported nickel-based nanoparticles were obtained at the surface of the germanophosphate glasses by bottom-up process and evaluated as potential catalysts for the benzyl alcohol oxidation and bis(indolyl)methanes synthesis. A classical meltquenching technique was used for preparing the nickel-doped germanophosphate glasses, followed by annealing under a hydrogen atmosphere at 400 C for two different times. The approach enabled the synthesis of self-supported nanoparticles as a homogeneous film, covering the glass surface. The physical and chemical properties of synthesized glasses were characterized by UV-vis and Raman spectroscopies and thermal analysis. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were performed to monitor the growth process, morphology and chemical bonding structure of the nanoparticles surface. |