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材料工程  2010 

阳极氧化TiO2纳米线生长研究

, PP. 79-83

Keywords: TiO2纳米线,阳极氧化,NH4F-乙二醇-H2O,TiO2纳米管阵列

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Abstract:

采用NH4F-乙二醇-H2O溶液体系的电化学阳极氧化法,在金属钛基板上形成厚度为0.9~36μm的TiO2纳米管阵列.研究了阳极氧化电压、氧化时间及电解液的组成对TiO2纳米管阵列结构的影响.结果表明,当醇水体积比为391时,60V电压下氧化2h,TiO2纳米管顶部的氧化层在缺陷处发生二次击穿溶解,产生自组装的孔核,场助溶解驱动力使纳米管顶部在孔核处沿管轴向垂直劈裂,形成直径20nm、长度可达几微米的TiO2纳米线.

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