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Keywords:

  • copper oxides;
  • copper sulfides;
  • core–shell materials;
  • hollow spheres;
  • ion exchange
Thumbnail image of graphical abstract

Transformation in a shell: Ion exchange is used for the fabrication of multishelled inorganic hollow materials. The transformation of solid Cu2O to Cu2S hollow spheres is investigated as a model reaction (see picture; PVP=poly(vinylpyrrolidone)).