Rapid surfactant-free synthesis of Mg(OH)2 nanoplates and pseudomorphic dehydration to MgO

James M. Hanlon, Laura Bravo Diaz, Giulia Balducci, Blane A. Stobbs, Marek Bielewski, Peter Chung, Ian Maclaren, Duncan H. Gregory

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Abstract

Magnesium hydroxide nanoplates ca. 50 nm in thickness can be prepared over minute timescales via hydrothermal synthesis in a multimode cavity (MMC) microwave reactor. This approach allows ca. 1 g of single-phase Mg(OH)2 to be synthesised in less than 3 minutes without the requirement of surfactants or non-aqueous solvents. The hydroxide nanomaterial dehydrates at temperatures >200 K below that of the equivalent bulk material and can be utilised as a precursor for the pseudomorphic synthesis of nanoplates of MgO as investigated by TG-DTA-MS, PXD and SEM measurements. Equally, the pseudomorphic synthesis can be performed by irradiating the Mg(OH)2 nanomaterial with microwaves for 6 minutes to produce single-phase MgO.

Original languageEnglish
Pages (from-to)5672-5679
Number of pages8
JournalCrystEngComm
Volume17
Issue number30
DOIs
Publication statusPublished - Aug 14 2015

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Hanlon, J. M., Bravo Diaz, L., Balducci, G., Stobbs, B. A., Bielewski, M., Chung, P., ... Gregory, D. H. (2015). Rapid surfactant-free synthesis of Mg(OH)2 nanoplates and pseudomorphic dehydration to MgO. CrystEngComm, 17(30), 5672-5679. https://doi.org/10.1039/c5ce00595g