Abstract
AbstractCeramic 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.
Highlights
Owing to rewards from the synergy effect of different levels of pores regardless of scales, shapes, connectivity or locations, hierarchical porous ceramics generally behave outstanding multi-functionalities including high selectivity, specific surface area, relative strength as well as rapid mass transport, which could be well tuned according to the practical demands and perform excellent in the applications involving adsorbents, catalyst supports, drug delivery, filtration, energy storage and the like [1,2,3]
We demonstrate the possibility of 3D printing the gel emulsions into lattice-shape ceramics with multiple-levels open channels, large specific surface area, and low density, with the aid of direct ink writing method
The preparation of 3D hierarchical porous ceramics with interconnected pores through gelation of particle-stabilized emulsions armored by boehmite nanoparticles are proposed here
Summary
Owing to rewards from the synergy effect of different levels of pores regardless of scales, shapes, connectivity or locations, hierarchical porous ceramics generally behave outstanding multi-functionalities including high selectivity, specific surface area, relative strength as well as rapid mass transport, which could be well tuned according to the practical demands and perform excellent in the applications involving adsorbents, catalyst supports, drug delivery, filtration, energy storage and the like [1,2,3]. [16] These materials will have high porosity, and open pore structure and large specific surface area.
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