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Facile and rapid synthesis of nanoplates Mg(OH)2 and MgO via Microwave technique from metal source: structural, optical and dielectric properties

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
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Abstract

Magnesium hydroxide and magnesium oxide nanostructures have been prepared by microwave/hydrothermal technique using magnesium metal in hydrogen peroxide (H2O2). The applied power of the microwave was 700 W for 10 min at 145 °C. The method produced Mg(OH)2 powder as a base material for MgO by calcinations at 550 °C for 2 h. X-ray diffraction data confirms the microwave production of Mg(OH)2 and (MgO) through the agreement with the standard JCDPS cards. Scanning electron microscopy shows nanoplates morphology for Mg(OH)2 and large-scale nanoplates with a hexagonal shape for MgO. The fundamental direct optical band gap of Mg(OH)2 equals 5.8 eV while for MgO equals 5.2 eV from the analysis of diffused reflectance data. MgO has higher dielectric constant than Mg(OH)2 at the higher frequencies. AC electrical conductivity increases with increasing the applied frequency for both materials. The microwave-hydrothermal technique shows a promising method for production of magnesium compounds from magnesium metal which can be used in different aspects such as catalysis, wastewater treatment, pharmaceutical and coated materials.

SEM images of MgO nano-plates

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Acknowledgements

The authors are grateful to The Research Center for Advanced Material Science (RCAMS) at King Khalid University, with grant number (RCAMS-1-17-5).

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Authors and Affiliations

  1. Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia

    H. Y. Zahran & I. S. Yahia

  2. Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Semiconductor Lab., Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt

    H. Y. Zahran, S. S. Shneouda & I. S. Yahia

  3. Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, 61413, P.O. Box 9004, Saudi Arabia

    I. S. Yahia

  4. Physics Department, Faculty of Science, Suez Canal University, Ismailia, Egypt

    Farid El-Tantawy

Authors
  1. H. Y. Zahran
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  2. S. S. Shneouda
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  3. I. S. Yahia
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  4. Farid El-Tantawy
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Corresponding author

Correspondence to I. S. Yahia.

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Highlights

  • Magnesium hydroxide and magnesium oxide nanostructures have been prepared by microwave/hydrothermal technique.

  • SEM shows nano-plates morphology for Mg(OH)2 and large-scale nano-plates with a hexagonal shape for MgO.

  • The direct optical band gap of Mg(OH)2 equals =5.012 eV while for MgO equals 4.844 eV from the analysis of diffused reflectance data.

  • MgO has higher dielectric constant than Mg(OH)2 at the higher frequencies.

  • Magnesium compounds can be used as catalysis, wastewater treatment, pharmaceutical and coated materials.

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Zahran, H.Y., Shneouda, S.S., Yahia, I.S. et al. Facile and rapid synthesis of nanoplates Mg(OH)2 and MgO via Microwave technique from metal source: structural, optical and dielectric properties. J Sol-Gel Sci Technol 86, 104–111 (2018). https://doi.org/10.1007/s10971-018-4613-2

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  • DOI: https://doi.org/10.1007/s10971-018-4613-2

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