铬簇合物交联蒙脱石的合成

Synthesis of CrossLinked Montmorillonite by Adopting Chromium Cluster Compound

首次采用铬簇合物［Ｃｒ３Ｏ（ＯＯＣＣＨ３）６（ＯＨ２）３］Ｃ１·６Ｈ２Ｏ（简记为ＣｒＺ）作交联剂，制备交联蒙脱石多孔材料．通过ＸＲＤ，ＩＲ和比表面及吸氨量测定等方法，研究交联蒙脱石多孔材料的物理化学性质．结果表明，由ＣｒＺ制成的交联蒙脱石的层间距（ｄ００１）达１．５５ｎｍ，层间开孔达０．６ｎｍ，比表面１２９ｍ２·ｇ－１；高温（４５０～５５０℃）焙烧后，ＣｒＺ相变成α－Ｃｒ２Ｏ３，在蒙脱石的层间呈单分子层状态．

Porous material of crosslinked montmorillonite is prepared for the first time by adopting chromium cluster compound [Cr3O(OOCCH3)6(OH2)3]Cl·6H2O, namely CrZ, as crosslinking agent. Its physical and chemical properties are studied by Xray diffraction, infrared analysis, specific surface and ammonia adsorption measurement. It shows an interlayer space (d001)up to 1.55 nm, interlayer pore up to 0.60 nm, and specific surface of 129 m2·g-1.After calcinating at high temperature between 450 ℃ and 550 ℃,CrZ becomes αCr2O3; and the interlayer of montmorillonite shows the state of single molecular layer.