Self-supported nickel nanoparticles on germanophosphate glasses: Synthesis and applications in catalysis

• Autor(a) principal: Lenz, Guilherme Felipe
• Data de Publicação: 2019
• Outros Autores: Schneider, Rodrigo, Rossi De Aguiar, Kelen M. F., Bini, Rafael A., Chaker, Juliano Alexandre, Hammer, Peter [UNESP], Botteselle, Giancarlo V., Felix, Jorlandio F., Schneider, Ricardo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1039/c9ra02927c; http://hdl.handle.net/11449/190414

The development of supported catalysts based on simple procedures without waste products and time-consuming 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 melt-quenching 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.