Pt/Fe3O4-coated mCmSiO2 catalyst with Janus structure and preparation method of Pt/Fe3O4-coated mCmSiO2 catalyst

The invention discloses a Pt/Fe3O4 (at) mCamp/Pt/Fe3O4 (at) mCamp of a Janus structure. The invention relates to an mSiO2 catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) preparing Fe3O4amp; the molecular weight of the nano-particles is mSiO2 asymmetric nano-particles; (2) carrying out amp on the Fe3O4amp; the preparation method comprises the following steps: dispersing mSiO2 asymmetric nanoparticles in a mixed solution of ethanol, deionized water, dopamine hydrochloride and a template agent, carrying out ultrasonic dispersion, and then mechanically stirring to obtain a uniform transparent solution; (3) adding mesitylene into the transparent solution, mechanically stirring, then adding tris (hydroxymethyl) aminomethane to adjust the pH value, and introducing H2PtCl6 into a reaction system after the tris (hydroxymethyl) aminomethane is added for not less than 1 hour; after the reaction, washing a solid product, and calcining the solid product in a high-temper