Disordered Inorganic Nanostructures

这个合作团体奖支持密歇根州立大学T.J. Pinnavaia、M.G. Kanatzidis、S.J.L. Billinge、S.D. Mahanti和M.F. Thorpe的研究，由化学部门支持。研究的重点是无序无机纳米结构的设计、合成、表征和计算模拟。将探讨两种类型，氧化物，典型的二氧化硅和氧化铝，和非氧化介孔结构，典型的硫族化合物。用中性表面活性剂作为模板，通过自组装制备水热稳定的氧化介结构。框架结构和继承粒子结构，即囊泡、薄膜和多孔粘土异质结构，将被制成并表征为表面活性剂和加工条件的函数。表征将通过小角x射线（SAXS）和中子散射（SANS），透射电子显微镜和原子对分布函数（PDF）分析粉末衍射图样。通过在硫醇连接的金颗粒周围模板化金属硫化物制备柱状层状硫族化合物。用表面活性剂模板法制备的过渡金属硫族化合物框架将半导体现象与客体分子的可接近性结合起来。多孔网络的建模和表面活性剂自组装过程的模拟以及在感兴趣的介观结构中的扩散和进入将补充实验研究。无序的无机氧化物介结构具有高度可接近的框架孔和高水热稳定性，可能会在液相催化和分离中找到传统沸石无法实现的应用。金属硫族化物介结构可作为活性加氢脱硫催化剂、电子材料和传感器材料。

This collaborative group award supporting the research of T.J. Pinnavaia, M.G. Kanatzidis, S.J.L. Billinge, S.D. Mahanti and M.F. Thorpe at Michigan State University is supported by the Chemistry Division. The focus of the research is the design, synthesis, characterization and computational simulation of disordered inorganic nanostructures. Two types will be explored, oxides, typically silica and alumina, and non-oxidic mesoporous structures, typically chalcogenides. Hydrothermally stable oxide mesostructures will be made by self-assembly using neutral surfactants as templates. Framework structures and heirarchal particle structures, i.e. vesicles, thin films, and porous clay heterostructures, will be made and characterized as a function of the surfactant and processing conditions. Characterization will be by small angle x-ray (SAXS) and neutron scattering (SANS), transmission electron microscopy and atomic pair distribution function (PDF) analysis of powder diffraction patterns. Pillared lamellar chalcogenides will be prepared by templating metal sulfides around thiol-ligated gold particles. Transition metal chalcogenide frameworks prepared by surfactant templating will combine semiconducting phenomena with accessibility by guest molecules. Modeling of porous networks and simulations of the surfactant self-assembly process and diffusion and access in the mesostructures of interest will complement experimental studies.Disordered inorganic oxide mesostructures with highly accessible framework pores and having high hydrothermal stability will likely find applications in liquid-phase catalysis and separations not achievable with conventional zeolites.Metal chalcogenide mesostructures may be active hydrodesulfurization catalysts, electronic materials and sensor materials.