ChemInform Abstract: Morphology and Topochemical Reactions of Novel Vanadium Oxide Nanotubes.
Abstract
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ChemInform Abstract
The preparation of new vanadium oxide nanotubes is achieved via formation of a gel by hydrolysis of an VO(O-iPr)3—amine (CnH2n+1NH2, 4 ≤ n ≤ 22, or H2N(CH2)mNH2, 14 ≤ m ≤ 20) adduct prepared in EtOH followed by hydrothermal treatment (autoclave, 180 °C, 2—7 d). The process is reproducible and leads to the nanotubes in excellent yield and with high selectivity. The tubes are 15 μm long and have outer diameters of 15—150 nm and inner diameters of 5—50 nm. The tube walls consist of 2—20 crystalline vanadium oxide layers with the amine or diamine intercalated between the layers. The thickness of the walls is controlled by the chain length of the alkylamine which acts as structure-directing agent.
