Synthesis of AlPO-5 with diol-substituted imidazolium-based organic template

Damien Yiyuan Khoo , Svetlana Mintova (1) , Hussein Awala (1) , Eng-Poh Ng (2)

1 LCS - Laboratoire catalyse et spectrochimie
2 LMPC - Laboratoire de Matériaux à Porosité Contrôlée

AlPO-5 crystals were prepared using 3-(2,3-dihydroxypropyl)-1,2-dimethylimidazolium hydroxide, [dhpdm]OH, as a new structure-directing agent. The effects of the synthesis conditions and precursor compositions on the crystallinity, crystallite size, morphology and phase purity have been studied. The results showed that well-defined AlPO-5 crystals with various morphologies and sizes were synthesized by careful adjustment of the synthesis conditions. Furthermore, the state of the occluded [dhpdm]OH molecules in the AlPO-5 crystals was also studied. The confined [dhpdm]OH molecules exhibited polar diol functionality, which provoked the very strong interaction with the AlPO-5 crystals. An alternative method for template removal based on the Fenton-like microwave assisted oxidation reaction was applied and it was found to be more efficient as compared to conventional calcination.

Domaines: Chimie

Damien Yiyuan Khoo, Svetlana Mintova, Hussein Awala, Eng-Poh Ng. Synthesis of AlPO-5 with diol-substituted imidazolium-based organic template. Microporous and Mesoporous Materials, 2014, 194 (Accessed by 08/2014), pp.200--207. ⟨10.1016/j.micromeso.2014.04.010⟩. ⟨hal-01840264⟩