U.S.-Australia Cooperative Research on the Synthesis of Ordered Composites on a Nanometer Sized Scale by Manipulation of Layered Compounds

该奖项支持亚伯拉罕克利尔菲尔德博士访问 德克萨斯农工大学到澳大利亚墨尔本的CSIRO， 和特里·特尼医生一起工作 研究人员建议， 联合收割机将两者在材料合成方面的专长结合起来， 合成新型无机纳米复合材料的机构 材料与两个相关的合成程序。 在 首先，粘土和其它层状化合物通过交联剂柱撑， 各种聚阳离子和热处理分解 支柱变成一层氧化物夹在主机之间 层次。 待柱撑的化合物包括粘土、四价粘土、二价粘土、三价粘土、三价粘土、四价 磷酸盐，层状含水氧化物，层状钛酸盐， 层状K型尖晶石和层状 双氢氧化物 后一类化合物是柱撑的 聚阴离子 然后将这些柱撑化合物 将柱子热分解成氧化物片 夹在主体的层之间，从而产生陶瓷 纳米复合材料 在第二个合成程序中，两个或更多个化合物被合成。 更多的层状化合物将剥落成它们各自的 层，混合并重构成单一相。 的 将通过将悬垂的 亲水性有机基团的层或插入 聚醚胺层之间。 各种各样的二， 三价和四价金属化合物可以在 这种时尚。 去角质物的重构将是 通过热除去有机物，通过酸处理 以除去插层胺，或通过温和的碱性水解 的膦酸盐。 最终的退火固体将是 层间磷酸盐、氢氧化物或氧化物， 用新的催化剂构成新型的这种固体， 磁性和电性。

This award supports a visit by Dr. Abraham Clearfield of Texas A&M University to CSIRO, Melbourne, Australia, to work with Dr. Terry Turney. The researchers propose to combine the expertise in materials synthesis of the two institutions to synthesize novel inorganic nanocomposite materials with two related synthetic procedures. In the first, clays and other layered compounds are pillared by a variety of polycations and thermally treated to decompose the pillar into a layer of oxide sandwiched between the host layers. Compounds to be pillared include clays, tetravalent phosphates, layered hydrous oxides, layered titanates, silicic acids, layered spinels of the type K and layered double hydroxides. The latter class of compounds is pillared by polyanions. These pillared compounds will then be treated thermally to decompose the pillar into sheets of oxide sandwiched between layers of the host, thus creating ceramic nanocomposites. In the second synthetic procedure, two or more layered compounds will be exfoliated into their individual layers, mixed and reconstituted into a single phase. The exfoliates will be prepared by either attaching pendent hydrophilic organic groups to the layers or intercalating a polyether amine between the layers. A wide variety of di-, tri- and tetravalent metal compounds may be manipulated in this fashion. Reconstitution of the exfoliates will be effected by thermal removal of the organic, by acid treatment to remove intercalated amines, or by gentle alkaline hydrolysis of the phosphonates. The final annealed solids will be interlayered phosphates, hydroxides or oxides, and will constitute new types of such solids with novel catalytic, magnetic and electrical properties.