title: Chemisorption of cyanogen chloride by spinel ferrite magnetic nanoparticles.
abstract: Spinel ferrite magnetic nanoparticles, MnFe2O4, NiFe2O4, and CoFe2O4, were synthesized and used as gas-phase adsorbents for the removal of cyanogen chloride from dry air. Fixed-bed adsorption breakthrough experiments show adsorption wave behavior at the leading edge of the breakthrough curve that is not typical of physically adsorbed species. Fourier transform infrared spectroscopy (FTIR) results indicate that CK is reacting with the spinel ferrite surface and forming a carbamate species. The reaction is shown to be a function of the hydroxyl groups and adsorbed water on the surface of the particles as well as the metallic composition of the particles. The surface reaction decreases the remnant and saturation magnetism of the MnFe2O4 and CoFe2O4 particles by approximately 25%.
authors.affiliation: SAIC, Gunpowder Branch, APG, Maryland 21010, United States. thomas.g.glover@saic.com
authors.forename: T Grant
authors.initials: TG
authors.lastname: Glover
authors.forename: Jared B
authors.initials: JB
authors.lastname: DeCoste
authors.forename: Daniel
authors.initials: D
authors.lastname: Sabo
authors.forename: Z John
authors.initials: ZJ
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D003486:Cyanides / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003486:Cyanides; D005290:Ferric Compounds; D058185:Magnetite Nanoparticles; C001215:ferrite; C014430:cyanogen chloride