Journal
JOURNAL OF MATERIALS SCIENCE
Volume 47, Issue 3, Pages 1142-1147Publisher
SPRINGER
DOI: 10.1007/s10853-011-5960-3
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Hydrogen phosphate intercalated Mg/Al-layered double hydroxides (LDH-HPO4) were synthesized by a homogeneous precipitation method with urea and anion exchange. The intercalated hydrogen phosphate was removed by anion exchange with Na2CO3, NaOH-NaCl, and 1-octanesulfonate solutions. The phosphate removal behavior was characterized by X-ray diffraction (XRD), Fourier Transform-InfraRed (FT-IR) spectroscopy, and elemental analysis. Complete removal of interlayer hydrogen phosphate from LDH-HPO4 was realized using 1-octanesulfonate solution. Two reasons are proposed to explain complete hydrogen phosphate removal from the interlayer space of LDH-HPO4. Complete desorption and cyclability suggest this is a viable technique to use as an efficient adsorption/desorption system in industrial applications.
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