Hydrothermal synthesis of Mn-kaolinite using NaOH or KOH and characterization

Moaaz K. Seliem, S. Komarneni, M. Park, H. Katsuki, M. G. Shahien, A. A. Khalil, I. M. Abd El-Gaid

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8 Scopus citations


Mn-kaolinite containing both Mn and Al in the octahedral sheetwas prepared under hydrothermal conditions of 100-200 °C for 6-96 h by using Al-nitrate, Mn-carbonate, silicic acid and aqueous solutions of NaOH or KOH. The synthetic phases were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray Absorption Near Edge Structure (XANES) spectroscopy. The results showed that the best hydrothermal conditions to prepare well-crystallized Mn-kaolinite were 100-175 °C for 2 days using either NaOH or KOH and the Mn species was mostly present as Mn3+ as determined by XANES spectroscopy.

Original languageEnglish (US)
Pages (from-to)74-79
Number of pages6
JournalApplied Clay Science
Issue number1-2
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology


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