Thursday, November 11, 2010: 8:30 AM
250 A Room (Salt Palace Convention Center)
Nanoporous and mesoporous materials impregnated with metal active sites have shown potential as novel adsorbents for the removal of light toxic chemicals from air by chemical association. Questions remain about the effect of using different metal salts as precursors for incorporating the metal active sites into the adsorbent materials. This work addresses these questions by exploring the effects of the metal cation, metal salt anion, metal oxidation state, and the drying temperature on the ammonia capacity of the resulting samples. The nitrates, chlorides, sulfates, and carbonates of zinc, copper, and iron have been successfully impregnated via a solution method into MCM-41, an ordered mesoporous silica material, and characterized via XRD, adsorption isotherms, and ammonia capacity. The characterization techniques show that the metals have been successfully incorporated into the silica phase without disrupting the hexagonal MCM-41 structure. Ammonia capacities for the metal-impregnated MCM-41 materials have been investigated to evaluate the effects of using the different precursor materials as impregnates in the siliceous adsorbent.