This invention discloses a method for preparing a spatially confined
copper-based catalyst for activating
persulfate degradation of organic pollutants in water: (1) Dissolve nano-
oxide materials and carbon sources in a
solvent, stir thoroughly,
centrifuge, dry, and then calcine the resulting
powder at high temperature. After cooling, etch with an
etching solution,
centrifuge, and dry to obtain spatially confined carbon spheres; (2) Disperse the spatially confined carbon spheres obtained in step (1) with
copper salt and precipitant in water,
centrifuge, dry, and then calcine the resulting
powder at high temperature. After cooling, the spatially confined
copper-based catalyst is obtained. This invention also includes the spatially confined copper-based catalyst prepared by the above method and its application in activating
persulfate degradation of organic pollutants in water. By constructing a carbon sphere-CuO heterostructure catalytic structure with spatial confinement effect, the synergistic effect of spatial confinement, interfacial electronic
coupling, and active sites is fully utilized, achieving multiple synergistic regulation of
pollutant enrichment, rapid
electron transport, and selective activation of
persulfate. Compared with traditional copper-based catalytic systems, this invention can effectively regulate the generation pathway of
reactive oxygen species, significantly improve the utilization efficiency of persulfate and the selectivity of
pollutant degradation, and significantly enhance the stability, anti-interference ability and recycling performance of the catalyst. It can be widely used in the deep purification of recalcitrant organic pollutants such as pesticides,
antibiotics, and
phenols, as well as in the treatment of complex
wastewater.