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A facile step-by-step approach is developed for synthesizing the high-efficiency and magnetic recyclable Fe_3O_4@SiO_2@Ag@Ni trepang-like nanocomposites.This method involves coating Fe_2O_3 nanorods with a uniform silica layer,reduction in 10%H_2/Ar atmosphere to transform the Fe_2O_3 into magnetic Fe_3O_4,and finally depositing Ag@Ni core-shell nanoparticles on the L-lysine modified surface of Fe_3O_4@SiO_2 nanorods.The fabricated nanocomposites are further characterized by x-ray diffraction,transmission electron microscopy,scanning electron microscope,Fourier transform infrared spectroscopy,and inductively coupled plasma mass spectroscopy.The Fe_3O_4@SiO_2@Ag@Ni trepang-like nanocomposites exhibit remarkably higher catalytic efficiency than monometallic Fe_3O_4@SiO_2@Ag nanocomposites toward the degradation of Rhodamine B(RhB) at room temperature,and maintain superior catalytic activity even after six cycles.In addition,these samples could be easily separated from the catalytic system by an external magnet and reused,which shows great potential applications in treating waste water.
A facile step-by-step approach is developed for synthesizing the high-efficiency and magnetic recyclable Fe_3O_4 @ SiO_2 @ Ag @ Ni trepang-like nanocomposites. This method involves coating Fe_2O_3 nanorods with a uniform silica layer, reduction in 10% H_2 / Ar atmosphere to transform the Fe_2O_3 into magnetic Fe_3O_4, and finally depositing Ag @ Ni core-shell nanoparticles on the L-lysine modified surface of Fe_3O_4 @ SiO_2 nanorods.The fabricated nanocomposites are further characterized by x-ray diffraction, transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, and inductively coupled plasma mass spectroscopy. and inductively coupled plasma mass spectroscopy. The Fe_3O_4 @ SiO_2 @ Ag @ Ni trepang-like nanocomposites exhibit remarkably higher catalytic efficiency than monometallic Fe_3O_4 @ SiO_2 @ Ag nanocomposites toward the degradation of Rhodamine B (RhB) at room temperature, and maintain superior catalytic activity even after six cycles. addition, these samples could be easily separated from the catalytic syste m by an external magnet and reused, which shows great potential applications in treating waste water.