Effect of Ultrasonic Waves on the Formation of TiO2 Nanotubes by Electrochemical Anodization of Titanium in Glycerol and NH4F
Effect of Ultrasonic Waves on the Formation of TiO2 Nanotubes by Electrochemical Anodization of Titanium in Glycerol and NH4F
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DOI：
10.1380/ejssnt.2009.84
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发表时间：
2009-02
影响因子：
0.7
通讯作者：
F. Hassan;H. Nanjo;M. Kanakubo;I. Ishikawa;M. Nishioka
中科院分区：
文献类型：
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作者：
F. Hassan;H. Nanjo;M. Kanakubo;I. Ishikawa;M. Nishioka
本工作描述了阳极生长的自组织TiO 2纳米管（TiNT）钛样品中含有3%NH4F和5%H2O的甘油电解液。进行了两阶段阳极氧化。最初，将电位从0 V斜升至30、40和60 V。在第二阶段中，将电位保持在给定电位下长达5小时。超声波在阳极氧化过程中的应用被发现，增加反应速率，因为它降低了双电层周围的阳极氧化产物的浓度梯度。这导致高电流和纳米管的更快生长速率。在超声波条件下生成的TiNT的直径被发现小于在磁力搅拌下生成的相应TiNT的直径。然而，TiNT的形态受到严重影响，作为一个结果，表面扰动造成的表面能量密度的不均匀性。一个更好的途径，为好看的TiNT是生长他们在磁力搅拌溶液，然后通过超声清洗在去离子水中30秒。将阳极氧化电位从30 V增加到60 V分别将TiNT的尺寸从约90 nm增加到约150 nm。[DOI：10.1380/ejssnt.2009.84]
The present work describes the anodic growth of self-organized TiO2 nanotubes (TiNT) on titanium samples in an electrolyte containing 3% NH4F and 5% H2O in glycerol. Two stages anodization were proceeded. Initially, the potential was ramped from 0V to 30, 40 and 60 V. In the second stage the potential was held at the given potential up to 5 hrs. The application of ultrasonic waves during anodization was found to increase the reaction rates as it decreased the concentration gradient of the anodization products around the electric double layer. This resulted in high current and faster growth rates of the nanotubes. The diameters of the TiNT created under ultrasonic wave condition were found to be smaller than the corresponding TiNT created under magnetic stirring. However, the morphology of the TiNT was badly affected as a result of surface perturbation resulting from heterogeneity in surface energy density. A better route for good looking TiNT is to grow them under magnetically stirred solution followed by cleaning by sonication in deionized water for 30 seconds. Increasing the anodization potential from 30 to 60 V increased the dimensions of the TiNT from around 90 nm to around 150 nm, respectively. [DOI: 10.1380/ejssnt.2009.84]