Preparation, Characterization, and Catalytic Application of a Nanosized Ce sub(1)Mg sub(x)Zr sub(1-x) Solid Heterogeneous Catalyst for the Synthesis of Tetrahydrobenzo[b]pyran Derivatives

• Published in: Chinese journal of catalysis Vol. 31; no. 6; pp. 631 - 636
• Main Authors: Rathod, S, Arbad, B, Lande, M
• Format: Journal Article
• Language: Chinese
• Published: 01-06-2010
• Subjects: Catalysis; Catalysts; Catalytic activity; Derivatives; Ethyl alcohol; Mathematical analysis; Metal oxides; Nanomaterials; Nanostructure
• ISSN: 0253-9837
• DOI: 10.1016/S1872-2067(09)60078-4

A series of Ce sub(1)Mg sub(x)Zr sub(1-x) mixed metal oxides with different molar ratios were prepared by simple co-precipitation and were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, temperature-programmed desorption of CO sub(2), and N sub(2) adsorption techniques. The prepared materials were tested for catalytic activity by the synthesis of tetrahydrobenzo[b]pyran derivatives using a three component reaction (aromatic aldehydes, malononitrile, and dimedone) in an ethanol medium. The best catalytic activity was obtained with Ce sub(1)Mg sub(x)Zr sub(1-x) The particle size or crystallite size was estimated using the Debye-Scherrer equation. The addition of magnesium oxide into the ceria-zirconia lattice resulted in the formation of nanosized particles ranging from 5.41 to 9.78 nm. This work describes the catalytic behavior of magnesium oxide in mixed metal oxide systems.