Iron/Iron Oxide Nanoparticle Sequestration of Catalytic Metal Impurities from Aqueous Media and Organic Reaction Products

A host of transition metal ions (Co2+, Cu2+, Ni2+, RuX+, RhX+, Pd2+, Ag+, and Pt4+) were sequestered from aqueous media upon exposure to Fe x O y @Fe nanoparticles. Concentrations were lowered from approximately 100 ppm to below 40 ppb. This technique was extended to the removal of catalytic ions fr...

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Bibliographic Details
Published in:Langmuir 2007-09, Vol.23 (19), p.9543-9545
Main Authors: Macdonald, Janet E, Kelly, Joel A, Veinot, Jonathan G. C
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A host of transition metal ions (Co2+, Cu2+, Ni2+, RuX+, RhX+, Pd2+, Ag+, and Pt4+) were sequestered from aqueous media upon exposure to Fe x O y @Fe nanoparticles. Concentrations were lowered from approximately 100 ppm to below 40 ppb. This technique was extended to the removal of catalytic ions from the products of a “Click” cycloaddition and a Heck coupling in organic solvents. Residual metal concentrations in organic reaction products matched or exceeded pharmaceutical standards.
ISSN:0743-7463
1520-5827
DOI:10.1021/la7011827