A magnetically recyclable heterogeneous catalyst: Cobalt nano-oxide supported on hydroxyapatite-encapsulated gamma-Fe2O3 nanocrystallites for highly efficient olefin oxidation with H2O2

作者：Zhang Yan; Li Zhen; Sun Wei; Xia Chungu^*

来源：Catalysis Communications, 2008, 10(2): 237-242.

DOI：10.1016/j.catcom.2008.08.030

• Hydroxyapatite
• Supported cobalt catalyst
• H2O2
• Oxidation
• Cooperation effect

High catalytic activity of cobalt nano-oxide supported on hydroxyapatite-encapsulated magnetic gamma-Fe2O3 nanocrystallites had been prepared. HR-TEM characterization demonstrated the formation of gamma-Fe2O3 nanocrystallites within the HAP matrix with a mean diameter of 1-3 nm. The mixed Co3O4 and CoFe2O4 oxides were existed on the surface of CoHAP-gamma-Fe2O3. The CoHAP-gamma-Fe2O3 exhibited good catalytic activity for the oxidation of various alkenes based on a cooperation effect between these two oxides. The magnetic properties of the CoHAP-gamma-Fe2O3 provided a convenient route for separation of the catalyst from the reaction mixture by application of an external permanent magnet. The spent catalyst could be recycled without appreciable loss of catalytic activity.

• 出版日期2008-11-15
• 单位中国科学院; 中国科学院兰州化学物理研究所