Characteristic Sorption of H3BO3/B(OH) 4 - on magnesium oxide

Keiko Sasaki, Xinhong Qiu, Sayo Moriyama, Chiharu Tokoro, Keiko Ideta, Jin Miyawaki

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    The reaction mechanism of H3BO3/B(OH)4 - with MgO in aqueous phase was investigated using sorption isotherm, XRD, 11B-NMR and FTIR. Release of Mg2+ was observed soon after contact of MgO with H3BO3 and maximum released Mg2+ was proportional to the initial boron concentration, suggesting ligand-promoted dissolution of MgO by H3BO3. The molecular form of H3BO3 was more reactive with MgO in releasing Mg2+ ions than B(OH)4 -. 11B-NMR results indicated that trigonal B ( [3]B) was predominant over tetrahedral B ([4]B) in solid residues after sorption of H3BO3. The molar ratio of [4]B/[3]B increased with H3BO3 sorption density. XRD patterns for the solid residues were assigned to Mg(OH)2 and peaks broadened with increasing H3BO 3 sorption density, except for (hk0) planes due to c-axis lattice strain induced by incorporation of H3BO3 between layers. These results indicated that H3BO3 interfered in the c-axis stacking of in Mg(OH)2. Molecular H3BO3 acted as a trigger when reacting with the MgO surface, releasing Mg2+ to produce an unstable complex leading to the precipitation formation of Mg(OH) 2, which is a sink for the immobilization of H3BO 3/B(OH)4 -.

    Original languageEnglish
    Pages (from-to)1809-1817
    Number of pages9
    JournalMaterials Transactions
    Volume54
    Issue number9
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    Magnesium Oxide
    magnesium oxides
    Magnesia
    sorption
    Sorption
    releasing
    Nuclear magnetic resonance
    nuclear magnetic resonance
    Boron
    sinks
    immobilization
    Isotherms
    dissolving
    isotherms
    Dissolution
    boron
    actuators
    Ligands
    Ions
    ligands

    Keywords

    • B-NMR
    • Ligand-promoted dissolution
    • Magnesium oxide
    • Sorption mechanism
    • Trigonal boron

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Characteristic Sorption of H3BO3/B(OH) 4 - on magnesium oxide. / Sasaki, Keiko; Qiu, Xinhong; Moriyama, Sayo; Tokoro, Chiharu; Ideta, Keiko; Miyawaki, Jin.

    In: Materials Transactions, Vol. 54, No. 9, 2013, p. 1809-1817.

    Research output: Contribution to journalArticle

    Sasaki, K, Qiu, X, Moriyama, S, Tokoro, C, Ideta, K & Miyawaki, J 2013, 'Characteristic Sorption of H3BO3/B(OH) 4 - on magnesium oxide', Materials Transactions, vol. 54, no. 9, pp. 1809-1817. https://doi.org/10.2320/matertrans.M-M2013814
    Sasaki, Keiko ; Qiu, Xinhong ; Moriyama, Sayo ; Tokoro, Chiharu ; Ideta, Keiko ; Miyawaki, Jin. / Characteristic Sorption of H3BO3/B(OH) 4 - on magnesium oxide. In: Materials Transactions. 2013 ; Vol. 54, No. 9. pp. 1809-1817.
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