| abstract |
A novel silver-bearing tobermorite which can substitute for silver-, copper- or zinc-bearing zeolite, has excellent ethylene adsorptivity and antibacterial activity, and is also excellent in heat and water resistances and mechanical strengths. It has a composition represented by Ca 5-Y/2 Ag Y+Z M X-Z (Si 6-X Al X O₁₈H₂).4H₂O (wherein 0 ≦ X ≦ 1, 0.001 ≦ Y ≦ 2, 0 ≦ Z ≦ 0.1, and M represents a monovalent cation) and is produced by exchanging Ca²⁺ or both of Ca²⁺ and a monovalent cation, both being intercalated ions of tobermorite Ca₅M X (Si 6-X Al X O₁₈H₂).4H₂O (wherein 0 ≦ X ≦ 1 and M is as defined above), with silver ions. |