催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (6): 631-636.

• 研究论文 • 上一篇    下一篇

纳米 Ce1MgxZr1-xO2 固体多相催化剂的制备、表征及催化合成四氢苯并[b]吡喃衍生物的性能

Sandip RATHOD, Balasaheb ARBAD, Machhindra LANDE   

  1. Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad (M.S.) 431004, India
  • 收稿日期:2010-06-25 出版日期:2010-06-25 发布日期:2013-12-05

Preparation, Characterization, and Catalytic Application of a Nanosized Ce1MgxZr1-xO2 Solid Heterogeneous Catalyst for the Synthesis of Tetrahydrobenzo[b]pyran Derivatives

Sandip RATHOD, Balasaheb ARBAD, Machhindra LANDE   

  1. Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad (M.S.) 431004, India
  • Received:2010-06-25 Online:2010-06-25 Published:2013-12-05

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1876

被引次数

12

摘要： A series of Ce1MgxZr1-xO2 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-pro- grammed desorption of CO2, and N2 adsorption techniques. The prepared materials were tested for catalytic activity by the synthesis of tet-rahydrobenzo[b]pyran derivatives using a three component reaction (aromatic aldehydes, malononitrile, and dimedone) in an ethanol me-dium. The best catalytic activity was obtained with Ce1Mg0.6Zr0.4O2. The particle size or crystallite size was estimated using the De-bye-Scherrer equation. The addition of magnesium oxide into the ceria-zirconia lattice resulted in the formation of nanosized particles rang-ing from 5.41 to 9.78 nm. This work describes the catalytic behavior of magnesium oxide in mixed metal oxide systems.

关键词: Ce1MgxZr1-xO2, magnesium oxide, co-precipitation, nanosized material, tetrahydrobenzo[b]pyran

Abstract: A series of Ce1MgxZr1-xO2 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-pro- grammed desorption of CO2, and N2 adsorption techniques. The prepared materials were tested for catalytic activity by the synthesis of tet-rahydrobenzo[b]pyran derivatives using a three component reaction (aromatic aldehydes, malononitrile, and dimedone) in an ethanol me-dium. The best catalytic activity was obtained with Ce1Mg0.6Zr0.4O2. The particle size or crystallite size was estimated using the De-bye-Scherrer equation. The addition of magnesium oxide into the ceria-zirconia lattice resulted in the formation of nanosized particles rang-ing from 5.41 to 9.78 nm. This work describes the catalytic behavior of magnesium oxide in mixed metal oxide systems.

Key words: Ce1MgxZr1-xO2, magnesium oxide, co-precipitation, nanosized material, tetrahydrobenzo[b]pyran