METHOD FOR PRODUCING CARBON COATED NANOPARTICLES OF A TRANSITION METAL OXIDE
    4.
    发明申请
    METHOD FOR PRODUCING CARBON COATED NANOPARTICLES OF A TRANSITION METAL OXIDE 审中-公开
    生产过渡金属氧化物的碳纳米管的方法

    公开(公告)号:WO2009004187A3

    公开(公告)日:2009-03-12

    申请号:PCT/FR2008000765

    申请日:2008-06-06

    Abstract: The invention relates to a method for producing nanoparticles of at least one oxide of a transition metal selected from Ti, Zr, Hf, V, Nb and Ta, which are coated with amorphous carbon, wherein said method includes the following successive steps: (i) a liquid mixture containing as precursors at least one alkoxyde of the transition metal, an alcohol, and an acetic acid relative to the transition metal is prepared and diluted in water in order to form an aqueous solution, the precursors being present in the solution according to a molar ratio such that it prevents or sufficiently limits the formation of a sol so that the aqueous solution can be freeze-dried, and such that the transition metal, the carbon and the oxygen are present in a stoichiometric ratio according to which they are included in the nanoparticles; (ii) the aqueous solution is freeze-dried; (ii) the freeze-dried product obtained during the preceding step is submitted to pyrolysis under vacuum or in an inert atmosphere in order to obtain the nanoparticles. The invention also relates to the application of the method for producing transition metal carbide.

    Abstract translation: 本发明涉及一种用于制备选自Ti,Zr,Hf,V,Nb和Ta的至少一种选自Ti,Zr,Hf,V,Nb和Ta的过渡金属的氧化物的纳米颗粒的方法,所述方法包括以下连续步骤:(i )制备含有相对于过渡金属的过渡金属,醇和乙酸的至少一种烷氧基化物作为前体的液体混合物,并在水中稀释以形成水溶液,前体存在于溶液中 摩尔比使得其防止或充分限制溶胶的形成,使得水溶液可以被冷冻干燥,并且使得过渡金属,碳和氧以化学计量比存在,根据它们是 纳入纳米粒子; (ii)将水溶液冷冻干燥; (ii)在上述步骤中获得的冷冻干燥产物在真空或惰性气氛下进行热解,以获得纳米颗粒。 本发明还涉及生产过渡金属碳化物的方法的应用。

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