Yang Haifeng, Shi Qihui, Tian Bozhi, Lu Qingyi, Gao Feng, Xie Songhai, Fan Jie, Yu Chengzhong, Tu Bo, Zhao Dongyuan
Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China.
J Am Chem Soc. 2003 Apr 23;125(16):4724-5. doi: 10.1021/ja034005i.
A one-step nanocasting route has been demonstrated to prepare highly ordered single-crystal indium oxide nanowire (IONW) arrays with mesostructured frameworks. Unlike the reported multistep nanocasting process (synthesis of mesoporous materials, and then incorporation of precursors and formation of inorganic frameworks), a highly ordered mesostructured surfactant-silica monolith with low external surface serves as both the template and the reducing agent and makes the formation of single-crystal IONWs in its channels easily in one step by using normal In(NO(3))(3) as an inorganic precursor. After silica is removed, highly ordered uniform single-crystal IONW arrays with hexagonal (p6mm) or cubic (Ia3d) mesostructures are derived. These new materials are studied by XRD, SEM, TEM, N(2) adsoption, and UV spectrum. Furthermore, this one-step nanocasting synthesis route is a generalized method and can be used to synthesized a highly ordered mesoporous silica monolith with metal oxide nanocrystals in its channels. To the best of our knowledge, this is the first report of a single crystalline mesostructured In(2)O(3) framework.
已证明一种一步法纳米铸造路线可制备具有介观结构框架的高度有序的单晶氧化铟纳米线（IONW）阵列。与报道的多步法纳米铸造过程（合成介孔材料，然后引入前驱体并形成无机框架）不同，具有低外表面的高度有序的介观结构表面活性剂 - 二氧化硅整体既作为模板又作为还原剂，通过使用普通的In(NO₃)₃作为无机前驱体，使得在其通道中一步轻松形成单晶IONW。去除二氧化硅后，可得到具有六方（p6mm）或立方（Ia3d）介观结构的高度有序的均匀单晶IONW阵列。通过XRD、SEM、TEM、N₂吸附和UV光谱对这些新材料进行了研究。此外，这种一步法纳米铸造合成路线是一种通用方法，可用于合成通道中含有金属氧化物纳米晶体的高度有序介孔二氧化硅整体。据我们所知，这是关于单晶介观结构In₂O₃框架的首次报道。
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