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首页> 外文期刊>Journal of Materials Research >Natural rutile-derived titanate nanofibers prepared by direct hydrothermal processing
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Natural rutile-derived titanate nanofibers prepared by direct hydrothermal processing

机译：直接水热法制备天然金红石型钛酸酯纳米纤维

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Long titanate nanofibers (typically 10-500 mu m in length and 20-50 nm in diameter) were successfully prepared in high yield by the direct hydrothermal processing using natural rutile as a starting material. Fourier transform infrared spectroscopy, transmission electron microscopy, energy dispersive x-ray spectroscopy, electron diffraction, and x-ray diffraction demonstrated that the as-synthesized nanofibers presumably consisted of sodium hydrogen trititanate [(Na ,H)_2Ti_3O_7 e.g., Na_(0.4)H_(1.6)Ti_3O_7] including some hexatitanate-type defects [(Na, H)_2Ti_6O_(13)]. A partial topotactic condensation model explained their nanostructure well. Although the as-synthesized fibers are defective, they can be cured by a post-heat-treatment in air. The direct hydrothermal treatment for natural rutile will be a promising low-cost process for one-dimensional nanomaterials, which can act not only as a reaction step but also as a purification step.
机译：通过使用天然金红石为原料的直接水热加工，成功以高收率成功地制备了长钛酸酯纳米纤维（长度通常为10-500μm，直径为20-50 nm）。傅里叶变换红外光谱，透射电子显微镜，能量色散X射线光谱，电子衍射和X射线衍射表明，合成后的纳米纤维大概由三钛酸钠[[Na，H）_2Ti_3O_7组成，例如Na_（0.4） H_（1.6）Ti_3O_7]包括一些六钛酸酯型缺陷[（Na，H）_2Ti_6O_（13）]。部分全缩合模型很好地解释了它们的纳米结构。尽管合成纤维是有缺陷的，但是它们可以通过在空气中进行后热处理而固化。天然金红石的直接水热处理将是一维纳米材料的一种有前途的低成本方法，该方法不仅可以充当反应步骤，而且可以充当纯化步骤。

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