Catalyst role of Nd3+ions for the precipitation of silver nanoparticles in phosphate glass
The present work proposes that neodymium(III) performs as catalyst enhancing the precipitation of Ag nanoparticles (NPs) in silver-doped phosphate glass. In situ optical isothermal microspectroscopy was employed for evaluating the influence of the rare-earth dopant on the kinetics of Ag NP precipitation in real time in the solid-state host. A temperature-dependent first-order exponential increase with time of the peak optical density of the surface plasmon resonance of Ag NPs was observed in relation to concomitant particle nucleation and diffusion-driven growth. An Arrhenius-type plot was used for the activation energy estimation of the plasmonic Ag particles precipitation at 2.3 eV. This value is about 56% lower than the activation energy of 5.2 eV measured previously in our group  for the diffusion-based Ag NP growth in the glass without Nd3+ions. Further characterizations were performed by differential scanning calorimetry, transmission electron microscopy, solid-state31P nuclear magnetic resonance spectroscopy, and Raman scattering, in support of the in situ optical measurements. The distinctive results were discussed in the context of glass composition and structure.
Journal of Alloys and Compounds
Digital Object Identifier (DOI)
Jiménez, & Sendova, M. (2017). Catalyst role of Nd3+ ions for the precipitation of silver nanoparticles in phosphate glass. Journal of Alloys and Compounds, 691, 44–50. https://doi.org/10.1016/j.jallcom.2016.08.231