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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

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Synthesis and Characterisation of Core-Shell Microparticles Formed by Ni-Mn-Co Oxides.

Javier García-Alonso1, Svitlana Krüger2, Bilge Saruhan2

  • 1Departamento de Física de Materiales, Facultad de CC. Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.

Molecules (Basel, Switzerland)
|June 27, 2024
PubMed
Summary

Researchers developed core-shell microparticles using Ni-Mn-Co oxides via co-precipitation. These particles, with controlled compositions, show potential for advanced material applications.

Keywords:
core–shellmicroparticlesoxides

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Chemistry

Background:

  • Microparticle synthesis is crucial for advanced materials.
  • Nickel-manganese-cobalt oxides offer tunable properties.
  • Controlled core-shell structures enhance material performance.

Purpose of the Study:

  • To fabricate Ni-Mn-Co oxide core-shell microparticles.
  • To characterize their composition, structure, and surface properties.
  • To investigate the effect of synthesis parameters on particle formation.

Main Methods:

  • Oxalate-assisted co-precipitation route for microparticle synthesis.
  • Microscopy (e.g., SEM, TEM) for morphology and dimensions.
  • Spectroscopy (e.g., XPS, Raman) for composition and oxidation states.

Main Results:

  • Successfully synthesized core-shell microparticles (2-6 μm).
  • Identified NiO and NiMn2O4 phases, with spinel formation increasing with temperature.
  • Confirmed Ni-rich core (811) and Mn-rich shell (631) with distinct shell dimensions.

Conclusions:

  • The oxalate-assisted co-precipitation method effectively produces Ni-Mn-Co oxide core-shell microparticles.
  • Temperature control influences spinel phase formation and distribution within the shell.
  • Detailed characterization confirms the core-shell structure and composition, paving the way for tailored applications.