A facile one step synthesis of alumina monolith with bimodal pore structure from emulsion template

摘要

In this work, the macro-mesoporous alumina monolith has been achieved for the first time via co-polymerization of styrene emulsion and aluminum precursor. After elimination of organic components by calcination at 800 ℃, the well-crystallized η-Al_2O_3 phase was obtained, with S_(Bet) of 247.7 m~2/g. The spherical macropores in the micrometer range originated from a condensation reaction during drying, and the wormhole-like mesopores (ca. 3.6 nm) distributed on the macroporous walls were the result of the assembly of nanoparticles. The method can be extended to prepare other porous metal oxide monoliths.