M-hexaferrite–APTES/Pd(0) Magnetically Recyclable Nano Catalysts (MRCs)

Magnetically recovable BaFe 12 O 19 –APTES–Pd(0) and SrFe 12 O 19 –APTES–Pd(0) catalysts were easily synthesized by immobilizing Pd nanoparticles on the surface of magnetic hexaferrite–NH 2 microspheres. It was found that the combination of BaFe 12 O 19 , SrFe 12 O 19 and 3-aminopropyltriethoxysilane (APTES) could give rise to structurally stable catalytic sites. Furthermore, BaFe 12 O 19 –APTES–Pd(0) and SrFe 12 O 19 –APTES–Pd(0) magnetically recyclable nano catalysts (MRCs) can be recovered by magnet and reused for nine runs for hydrogenation of 4-nitroaniline and dinitribenzene without significant loss in its catalytic activity which shows the indicative of a potential applications of these catalyst in industry.