Formation of 1D chain-like Fe_3O_4@C/Pt sandwich nanocomposites and their magnetically recyclable catalytic property

摘要

Highly efficient and recoverable utilization of noble metals is desirable for catalyst design in the industrial application. Here we report one-dimensional (1D) chain-like Fe3O4@C/Pt sandwich nanocomposites obtained through a facile magnetic field-induced assembly followed by a simple adsorption-reduction method. Firstly, 1D Fe3O4@C core-shell nanochains are successfully synthesized by one-pot magnetic field-induced solvothermal reaction, using Fe3O4 nanospheres and glucose as starting materials. Then, a trace of N nanoparticles with 2 similar to 3 nm in size are uniformly immobilized onto the surface of the Fe3O4@C nanochains to form 1D chain-like Fe3O4@C/Pt sandwich nanocomposites via a simple adsorption-reduction method. Such 1D sandwich nanostructures endow the product with good magnetically recyclable catalytic performance towards hydrogenation reaction of ortho-chloronitrobenzene, where a complete conversion and stable selectivity to ortho-chloroaniline for four cycles are achieved. This work is helpful for rational design and development of highly efficient and recyclable catalysts based on noble metals.