Fast Synthesis of Metal-incorporated NKX-2 (MeNKX-2) Using Novel Ionic Liquid via Ionothermal Approach
Keywords: Metal-incorporated NKX-2; ionic liquid; ionothermal synthesis; microporous materials; zeolites
Abstract
The incorporation of other metal and non-metal cations into thealuminophosphate (MeAlPO-n) molecular sieves has played a major role in enhancing their applications in the field of adsorption, separation, the formation of host-guest advanced materials and catalysis. These materials are usually synthesized under hydrothermal condition. Recently, the ionothermal method has been reported as a green synthesis approach for the synthesis of aluminophosphate (AlPO-n) and metalloaluminophosphate (MeAlPO-n) materials by using non-volatile ionic liquids as a solvent and a structure directing agent. In this work, ionothermal synthesis of metastable metal-incorporated aluminophosphite NKX-2 (MeNKX-2), where Me = Zr, Cr, Co and Fe) using 1-benzyl-2,3-dimethylimidazolium chloride, [bdmim]Cl new ionic liquid was reported. The ionic liquid was first prepared and characterized before use for the synthesis of molecular sieves. The synthesized MeNKX-2 series were then characterized by X-ray diffraction, Fourier transforminfrared spectroscopy, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and ultraviolet-visible spectroscopy. The analyses revealed that MeNKX-2 could be synthesized in a fast and convenient way and the crystals with unique morphology could be obtained within 20 min instead of several days under hydrothermal condition.
Published 06 August 2018
Issue Vol 18 No 2 (2016): Malaysian Journal of Chemistry
Section Article