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Microflowers made of interconnected MnO_2 nanosheets have been successfully synthesized in a microwave reactor through a hydrothermal reduction of KMnO_4 with aqueous HCI at elevated temperatures in the presence of superparamagnetic Fe_3O_4SiO_2 core-shell nanoparticles.Due to the chemical compatibility between SiO_2 and MnO_2,the heterogeneous reaction leads to the spontaneous encapsulation of the Fe_3O_4@SiO_2 core-shell nanoparticles in the MnO_2 microflowers.The resulting hybrid particles exhibit multiple properties including high surface area associated with the MnO_2nanosheets and superparamagnetism originated from the Fe_3O_4@SiO_2 core-shell nanoparticles.which are beneficial for applications requiring both high surface area and magnetic separation.
Microflowers made of interconnected MnO_2 nanosheets have been successfully synthesized in a microwave reactor through a hydrothermal reduction of KMnO_4 with aqueous HCI at elevated temperatures in the presence of superparamagnetic Fe_3O_4SiO_2 core-shell nanoparticles. Due to the chemical compatibility between SiO_2 and MnO_2, the heterogeneous reaction leads to the spontaneous encapsulation of the Fe_3O_4 @ SiO_2 core-shell nanoparticles in the MnO_2 microflowers. The resulting hybrid particles exhibit multiple properties including high surface area associated with the MnO_2 nanosheets and superparamagnetism originated from the Fe_3O_4 @ SiO_2 core-shell nanoparticles. for applications requires both high surface area and magnetic separation.