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Preparation of active MgO by short-time thermal decomposition of Mg(OH)2

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Abstract

In the preparation of MgO, Mg(OH)2 was placed in a muffle furnace maintained at a desired temperature for rapid increase to the activation temperature and for short-time heating. The MgO obtained showed a higher activity for the retro-aldol reaction of diacetone alcohol and larger surface area in comparison with that prepared by conventional procedures. Among the prepared catalysts, MgO heated at 673 K for 20 min showed the highest activity. The prepared MgO has a wide and thin plate shape with a small crystal size. The surface area of MgO decreased monotonously with increase in heating time and temperature. Further thermal treatment produced a decrease in catalytic activity. After that, the activity was regenerated by a long-time thermal treatment. The change in crystal morphology and exposed surface crystal plane of MgO by thermal treatment is discussed.

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Acknowledgments

Authors acknowledge Mr. D. Inoue for his assistance with the SEM images.

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Authors and Affiliations

  1. RIKEN, 2-1 Hirosawa, Wako, 351-0198, Japan

    Michiko Kitagawa

  2. Hokkaido University of Education, 1-2 Hachiman-cho, Hakodate, 040-8567, Japan

    Sayaka Misu, Jun Ichikawa & Hiromi Matsuhashi

Authors
  1. Michiko Kitagawa
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  2. Sayaka Misu
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  3. Jun Ichikawa
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  4. Hiromi Matsuhashi
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Correspondence to Hiromi Matsuhashi.

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Kitagawa, M., Misu, S., Ichikawa, J. et al. Preparation of active MgO by short-time thermal decomposition of Mg(OH)2 . Res Chem Intermed 41, 9463–9473 (2015). https://doi.org/10.1007/s11164-015-1971-z

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  • DOI: https://doi.org/10.1007/s11164-015-1971-z

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