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    • 8. 发明公开
    • HIERARCHICAL POROUS MATERIAL AND PREPARATION METHOD THEREFOR
    • 层状多孔材料及其制备方法
    • EP3231512A1
    • 2017-10-18
    • EP14894183.4
    • 2014-12-19
    • Dalian Institute Of Chemical Physics, Chinese Academy Of Sciences
    • SUM, GongquanYUAN, LizhiJIANG, Luhua
    • B01J23/66B01J23/89B01J35/10B01J37/34C25D11/02
    • B01J23/66B01J21/04B01J23/02B01J23/06B01J23/14B01J23/50B01J23/688B01J23/72B01J23/8906B01J23/8913B01J23/892B01J23/8926B01J35/0013B01J35/002B01J35/006B01J35/1061B01J35/1066B01J35/1071B01J35/1076B01J35/109B01J37/348C23C14/34C23C18/14C25D3/02C25D5/00C25D9/08C25D11/02
    • This invention belongs to the field of nanomaterials. Specifically relates to a kind of hierarchical porous material and its preparation method. A kind of hierarchical porous material is disclosed, and said hierarchical porous material is composed of primary pore aggregates, the primary pore aggregates get together and formed the secondary pore aggregates, then the secondary pore aggregates connect to each other formed the hierarchical porous material; there are primary pores on said primary pore aggregates wherein the diameter of primary pore is 5∼500 nm; there are secondary pores on said secondary pore aggregates wherein the diameter of secondary pore is 1∼5 µm. Compared with existing technology, said hierarchical porous materials of this invention has apparent advantages of large surface area, high usage of precious metal and so on, which facilitating its mass transfer reaction when used as oxygen reduction reaction catalysts and other special applications. The preparation method of said hierarchical porous materials of this invention is green, simple, easy and low-cost as well as controllable pore size and porosity of hierarchical porous materials during preparation. When said hierarchical porous materials is used as oxygen reduction reaction (ORR) catalysts or photocatalysts, the catalytic activity can be improved significantly.
    • 本发明属于纳米材料领域。 具体涉及一种层次多孔材料及其制备方法。 本发明公开了一种分级多孔材料,所述分级多孔材料由初级孔隙聚集体组成,初级孔隙聚集体聚集形成次级孔隙聚集体,次级孔隙聚集体相互连接形成分级多孔材料; 在所述主要孔隙聚集体上存在主要孔隙,其中主要孔隙的直径为5〜500nm; 所述次生孔隙聚集体上有次生孔隙,其次生孔径为1〜5μm。 与现有技术相比,本发明的分级多孔材料具有表面积大,贵金属使用率高等优点,有利于作为氧还原反应催化剂等特殊用途时的传质反应。 本发明所述分级多孔材料的制备方法是绿色的,简单,容易且成本低廉,并且制备过程中分层多孔材料的孔径和孔隙率可控。 当所述分级多孔材料用作氧还原反应(ORR)催化剂或光催化剂时,催化活性可显着提高。