In this article, the catalyst Au/γ-Fe2O3@hydroxyapatite (Au/γ-Fe2O3@HAP) consisting of Au nanoparticles supported on the core–shell structure γ-Fe2O3@HAP was prepared through a deposition–precipitation method.
Ag–Fe3O4@chitin microspheres were developed as a retrievable catalyst and a potential chromatography column packing material for organic synthesis.