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A comparative study of anodized titania nanotube architectures in aqueous and nonaqueous solutions

机译：水溶液和非水溶液中阳极氧化二氧化钛纳米管结构的比较研究

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摘要

The unique and highly utilized properties of TiO_2 nanotubes are a direct result of nanotube architecture. To create different engineered architectures, the effects of electrolyte solution, time, and temperature on the anodization of titanium foil were studied along with the resultant anodized titanium oxide (ATO) nanotube architectures encompassing nanotube length, pore diameter, wall thickness, smoothness, and ordered array structure. Titanium foil was anodized in three different electrolyte solutions: one aqueous [consisting of NH_4F and (NH_4)2SO_4] and two nonaqueous (glycerol or ethylene glycol, both containing NH_4F) at varying temperatures and anodization times. Variation in anodization applied voltage, initial current, and effect of F~ ion concentration on ATO nanotube architecture was also studied. Anodization in the aqueous electrolyte produced short, rough nanotube arrays, whereas anodization in organic electrolytes produced long, smooth nanotube arrays greater than 10 μm in length. A position effect, relative to the solution-air interface, was observed in this work. Furthermore, it was found that anodization in glycerol at elevated temperatures for several hours could possibly produce freely dispersed individual nanotubes.
机译：TiO_2纳米管的独特且利用率高是纳米管结构的直接结果。为了创建不同的工程架构，研究了电解质溶液，时间和温度对钛箔阳极氧化的影响，并研究了所得的阳极氧化氧化钛（ATO）纳米管架构，包括纳米管长度，孔径，壁厚，光滑度和有序性数组结构。钛箔在三种不同的电解质溶液中进行阳极氧化：一种水溶液[由NH_4F和（NH_4）2SO_4组成]和两种非水（甘油或乙二醇，均含有NH_4F）在不同的温度和阳极氧化时间下进行阳极氧化。还研究了阳极氧化施加电压，初始电流以及F〜离子浓度对ATO纳米管结构的影响。水性电解质中的阳极氧化产生短而粗糙的纳米管阵列，而有机电解质中的阳极氧化产生长度大于10μm的长而光滑的纳米管阵列。在这项工作中，观察到了相对于溶液-空气界面的位置效应。此外，发现在升高的温度下在甘油中阳极氧化几个小时可能会产生自由分散的单个纳米管。

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  • 来源
    《Journal of Materials Research》 |2011年第20期|p.2612-2623|共12页
  • 作者

    Matthew R. Sturgeon; Peng Lai; Michael Z. Hu;

  • 作者单位

    Energy and Transportation Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 -6181;

    Energy and Transportation Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 -6181;

    Energy and Transportation Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 -6181;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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