Ceramic foam materials with highly porous microstructure are playing vital role in increasing areas, especially for those with requirements for open channels and superior specific surface area. In this work, a simple and versatile approach to prepare ceramic foams with open pores has been proposed, that is gelation of boehmite nanoparticle‐assembled emulsions. Notably, hierarchical porous microstructure with open channels and uniform pore structure has been built. High specific surface area up to389.4 m²/g is attainable, making it excellent adsorption material when combining the merit of hierarchical pore structure. Furthermore, lattice‐shaped ceramics are prepared via direct ink writing gelled emulsion, displaying the potential of forming lightweight material with complex shape and designable macrostructure. The three‐dimensional (3D) printed foams exhibit multiple open pores, which cover length scale from mm scale, to μm scale and nm scale, making them promising materials in several fields like adsorption and gas filtrations, etc.

中文翻译：

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勃姆石凝胶乳液中具有多个开孔的分层多孔陶瓷

具有高度多孔微结构的泡沫陶瓷材料在增加面积方面起着至关重要的作用，特别是对于那些需要开放通道和优异比表面积的材料。在这项工作中，提出了一种简单且通用的方法来制备具有开孔的陶瓷泡沫，即勃姆石纳米粒子组装的乳液的凝胶化。值得注意的是，已经建立了具有开放通道和均匀孔结构的分级多孔微结构。高比表面积高达389.4 m ²/ g是可实现的，当结合分级孔结构的优点时，使其成为优异的吸附材料。此外，格状陶瓷是通过直接墨水书写的凝胶乳液制备的，显示了形成具有复杂形状和可设计宏观结构的轻质材料的潜力。三维（3D）印刷泡沫具有多个开孔，覆盖了从毫米级到微米级到纳米级的长度尺度，使其成为吸附和气体过滤等多个领域的有前途的材料。