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Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture
Author(s) -
Ren Bo,
Liu Jingjing,
Huo Wenlong,
Gan Ke,
Yan Shu,
Chen Yugu,
Lu Yuju,
Yang Jinlong,
Huang Yong
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16138
Subject(s) - materials science , porosity , ceramic , silicon carbide , fabrication , composite material , calcination , nanotechnology , catalysis , medicine , biochemistry , chemistry , alternative medicine , pathology
Hierarchical structured porous ceramics have attracted tremendous research interests because of their numerous excellent properties including robust mechanical strength and large surface area. In this work, silicon carbide (SiC)‐based porous ceramics with three levels of pore hierarchy are fabricated from silicon particle‐stabilized foams and a subsequent one‐step calcination after they were embedded with coke. Three‐dimensional (3D) flexible nanofibrous network is adhered and wrapped on cell walls of porous ceramics, which is readily fine‐tuned and tailored by the temperature to provide optimized pore structure. The resultant SiC‐based porous ceramics present a density of 1.03 g/cm 3 at a porosity of 72% with a large quantity of hierarchical micro‐ and macropores. This hierarchical structure leads to robust compressive strength (23.52 MP a) and large surface area (64.32 m 2 /g). The fabrication method is straightforward and sought‐after, providing a facile technical route for advanced hierarchical porous ceramics used in filtration and catalysis fields.