Mesoporous mixed metal oxides derived from P123-templated Mg–Al layered double hydroxides

We report the preparation of mesoporous mixed metal oxides (MMOs) through a soft template method. Different amounts of P123 were used as structure directing agent to synthesize P123-templated Mg–Al layered double hydroxides (LDHs). After calcination of as-synthesized LDHs at 500 °C, the ordered mesopores were obtained by removal of P123. The mesoporous Mg–Al MMOs fabricated by using 2 wt% P123 exhibited a high specific surface area of 108.1 m2/g, and wide distribution of pore size (2–18 nm). An investigation of the “memory effect” of the mesoporous MMOs revealed that they were successfully reconstructed to ibuprofen intercalated LDHs having different gallery heights, which indicated different intercalation capacities. Due to their mesoporosity these unique MMOs have particular potential as drug or catalyst carriers.

Graphical abstractOrdered mesoporous Mg–Al MMOs can be obtained through the calcination of P123-templated Mg–Al–CO3 LDHs. The pore diameter is 2.2 nm. At the presence of ibuprofen, the Mg–Al MMOs can recover to Mg–Al–IBU LDHs, based on its “remember effect”.Figure optionsDownload full-size imageDownload as PowerPoint slide