Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1695927 | Applied Clay Science | 2010 | 6 Pages |
Abstract
Mn-kaolinite containing both Mn and Al in the octahedral sheet was 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.
Keywords
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Authors
Moaaz K. Seliem, S. Komarneni, M. Park, H. Katsuki, M.G. Shahien, A.A. Khalil, I.M. Abd El-Gaid,