title: Adsorption of sulfur dioxide by CoFe2O4 spinel ferrite nanoparticles and corresponding changes in magnetism.
abstract: Adsorption of sulfur dioxide on 10 nm CoFe(2)O(4) spinel ferrite nanoparticles was examined. Adsorption loadings of sulfur dioxide at breakthrough conditions were determined to be approximately 0.62 mol/kg, which is significant given the 150 m(2)/g surface area of the nanoparticles. Adsorption proceeds through a chemisorption mechanism with sulfur dioxide forming a sulfate upon adsorption on the particle surface, which leads to a 23% decrease in the remnant magnetization, a 20% decrease in the saturation magnetization, and a 9% decrease in the coercivity of the magnetic nanoparticles. Adsorbent materials that provide a magnetic signal when adsorption occurs could have broad implications on adsorption-based separations.
authors.affiliation: SAIC, Gunpowder Branch, APG, Maryland 21010, United States. thomas.g.glover6.ctr@mail.mil
authors.forename: T Grant
authors.initials: TG
authors.lastname: Glover
authors.forename: Daniel
authors.initials: D
authors.lastname: Sabo
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Vaughan
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Rossin
authors.forename: Z John
authors.initials: ZJ
authors.lastname: Zhang