4.7 Article

Converting Mn/Al layered double hydroxide anion exchangers into cation exchangers by topotactic reactions using alkali metal sulfate solutions

Journal

CHEMICAL COMMUNICATIONS
Volume 55, Issue 54, Pages 7824-7827

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc03491a

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Funding

  1. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES) [001]
  2. CNPq [303846/2014-3, 400117/2016-9]

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Layered double hydroxides (LDHs), traditional anion exchangers, can be converted into cation exchangers by topotactic reactions using aqueous solutions of alkali metal sulfates. LDHs with the composition [Mn2Al(OH)(6)](A(n-))(1/n)center dot yH(2)O (A(n-) = Cl- or NO3-, CO32-) were reacted with aqueous solutions of Na2SO4. The anion carbonate could only be partially replaced by sulfate.

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