2003 Volume 14 Issue Supplement Pages 173-176
The mesoporous silicate (MCM-41) was synthesized from sodium silicate solution and cetyltrimethylammonium bromide. Experiments about capturing behavior of MCM-41 for transition metal ions (cobalt, nickel, copper, or zinc) with acetylacetone have been conducted to assess the potential of MCM-41 as selective capturing materials. The amount of captured metal ions on MCM-41 was calculated by subtracting the final concentration from the initial concentration of metal ions analyzed by ICP-AES. In the case of copper, the amount of captured metal ions was increased by addition of acetylacetone. The chemical state of copper captured on MCM-41 was estimated by X-ray absorption near edge structure (XANES) analysis. The amount of metal ions captured with acetylacetone from the solution at pH 5.9 was found in the following order; Ni<Co<<Cu<Zn. These results demonstrated the potential of MCM-41 as selective capturing materials.
