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Synthesis and Characterization of Akaganeite-Like Ferric Oxyhydroxides

Published online by Cambridge University Press:  10 February 2011

J.C. Linehan ,
J. G. Darab ,
D. W. Matson ,
X. Chen  and
J. E. Amonette
J.C. Linehan
Affiliation:
Pacific Northwest National Laboratory[1], P.O. Box 999, MSIN K2-44, Richland, WA 99352, [email protected]
J. G. Darab
Affiliation:
Pacific Northwest National Laboratory[1], P.O. Box 999, MSIN K2-44, Richland, WA 99352, [email protected]
D. W. Matson
Affiliation:
Pacific Northwest National Laboratory[1], P.O. Box 999, MSIN K2-44, Richland, WA 99352, [email protected]
X. Chen
Affiliation:
Pacific Northwest National Laboratory[1], P.O. Box 999, MSIN K2-44, Richland, WA 99352, [email protected]
J. E. Amonette
Affiliation:
Pacific Northwest National Laboratory[1], P.O. Box 999, MSIN K2-44, Richland, WA 99352, [email protected]
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Abstract

Akaganeite, β-FeOOH, a natural ferric oxyhydroxide mineral, has a structure containing tunnel-like cavities in which chloride ions reside. Analogs of akaganeite in which carbonate or sulfate groups replace the chloride ions have also been synthesized. Both akaganeite and its substituted analogs are known to be precursors for active hydrocracking catalysts. We present powder X-ray diffraction (XRD) and X-ray absorption fine-structure spectroscopy (XAFS) data confirming the synthesis of new ferric oxyhydroxides having structures similar to akaganeite, but contain molybdate and tungstate oxy-anions. We also present a new hydrothermal method to prepare this family of materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 432: Symposium S – Aqueous Chemistry and Geochemistry of Oxides , 1996 , 157
Copyright
Copyright © Materials Research Society 1997

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References

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