HIERARCHICAL POROUS MATERIAL AND PREPARATION METHOD THEREFOR

摘要

A hierarchical porous material and a preparation method therefor. The hierarchical porous material is formed by interconnecting secondary pore aggregates which are formed by re-aggregating primary pore aggregates formed by aggregating nano-particles; the primary pore aggregates have primary pores, and the pore size of the primary pores is 5 - 500 nm; and the secondary pore aggregates have secondary pores, and the pore size of the secondary pores is 1-5 um. The hierarchical porous material has the advantages of a large surface area, a high utilization ratio of an active ingredient, etc., contributing to the material being used as an oxygen reduction catalyst and a mass transfer reaction and a catalytic reaction when it is applied in other special fields. The preparation method for the hierarchical porous material has the following advantages: it is green and environmentally friendly, simple and convenient, easy to implement and has a low production cost; and the pore size and porosity distribution of the hierarchical porous material can be controlled during the preparation process, etc.