Microwave-hydrothermal processing of layered anion exchangers

Sridhar Komarneni; Q. H. Li; Rustum Roy

doi:10.1557/JMR.1996.0236

Microwave-hydrothermal processing of layered anion exchangers

Sridhar Komarneni, Q. H. Li, Rustum Roy

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Abstract

We have compared the microwave-hydrothermal (M-H) processing with conventional hydrothermal (C-H) processing in the preparation of two layered anion exchangers, i.e., Mg₃Al(OH)₈NO₃ · nH₂O and Ni_1-xZn_2x(OH)₂(CH₃COO)_2x · nH₂O. Both these phases can be crystallized more rapidly (an order of magnitude) under M-H processing compared to C-H processing. The above layered mixed basic salt of Ni and Zn was found to exhibit very high selectivity for PO₄^≡ (K_d = 15,000). Its order of selectivity for various anions in the presence of 0.1 N NaCl (ratio of Cl^- to anion in question is 100) increases as follows: PO₄^≡ ≫ SO₄⁼ > NO₃^- .

Original language	English (US)
Pages (from-to)	1866-1869
Number of pages	4
Journal	Journal of Materials Research
Volume	11
Issue number	8
DOIs	https://doi.org/10.1557/JMR.1996.0236
State	Published - Aug 1996

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Microwave-hydrothermal processing of layered anion exchangers",

abstract = "We have compared the microwave-hydrothermal (M-H) processing with conventional hydrothermal (C-H) processing in the preparation of two layered anion exchangers, i.e., Mg3Al(OH)8NO3 · nH2O and Ni1-xZn2x(OH)2(CH3COO)2x · nH2O. Both these phases can be crystallized more rapidly (an order of magnitude) under M-H processing compared to C-H processing. The above layered mixed basic salt of Ni and Zn was found to exhibit very high selectivity for PO4≡ (Kd = 15,000). Its order of selectivity for various anions in the presence of 0.1 N NaCl (ratio of Cl- to anion in question is 100) increases as follows: PO4≡ ≫ SO4= > NO3- .",

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AU - Komarneni, Sridhar

AU - Li, Q. H.

AU - Roy, Rustum

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N2 - We have compared the microwave-hydrothermal (M-H) processing with conventional hydrothermal (C-H) processing in the preparation of two layered anion exchangers, i.e., Mg3Al(OH)8NO3 · nH2O and Ni1-xZn2x(OH)2(CH3COO)2x · nH2O. Both these phases can be crystallized more rapidly (an order of magnitude) under M-H processing compared to C-H processing. The above layered mixed basic salt of Ni and Zn was found to exhibit very high selectivity for PO4≡ (Kd = 15,000). Its order of selectivity for various anions in the presence of 0.1 N NaCl (ratio of Cl- to anion in question is 100) increases as follows: PO4≡ ≫ SO4= > NO3- .

AB - We have compared the microwave-hydrothermal (M-H) processing with conventional hydrothermal (C-H) processing in the preparation of two layered anion exchangers, i.e., Mg3Al(OH)8NO3 · nH2O and Ni1-xZn2x(OH)2(CH3COO)2x · nH2O. Both these phases can be crystallized more rapidly (an order of magnitude) under M-H processing compared to C-H processing. The above layered mixed basic salt of Ni and Zn was found to exhibit very high selectivity for PO4≡ (Kd = 15,000). Its order of selectivity for various anions in the presence of 0.1 N NaCl (ratio of Cl- to anion in question is 100) increases as follows: PO4≡ ≫ SO4= > NO3- .

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Microwave-hydrothermal processing of layered anion exchangers

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