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Effect of Electrolyte Pretreatment on the Formation of TiO2 Nanotubes: An Ignored yet Non‐negligible Factor
ChemElectroChem ( IF 4 ) Pub Date : 2018-02-13 , DOI: 10.1002/celc.201701231
Huifei Li 1 , Mei Ding 2 , Jian Jin 1 , Deen Sun 1 , Sam Zhang 3 , Chuankun Jia 2, 4 , Lidong Sun 1, 4
Affiliation  

Tailoring the geometric configuration of anodic TiO2 nanotubes enables their use in various applications. This paper demonstrates that the methods for pretreating electrolyte solutions significantly influence the growth of anodic nanotubes. Pretreatment is usually ignored by studies, but is a crucial and non‐negligible factor in the control of nanotube growth. The results indicate that magnetic stirring and ultrasonic agitation facilitate the dissolution and mass transport of ionic species in the solution, resulting in a homogeneous solution and a high TiO2 nanotube growth rate. Isolation of the solution from wide contact with the atmosphere through simple sealing further increases the growth rate. This is attributed to the hindrance of humidity absorption, which biases the original water content of the solution and thus causes the formation of an initial thick compact oxide layer that prevents ion diffusion. The findings can serve as a guide to electrolyte pretreatment routes for studying nanotube growth mechanisms and for tailoring nanotube features toward different applications.

中文翻译:

电解质预处理对TiO2纳米管形成的影响:一个可忽略但不可忽略的因素

定制阳极TiO 2纳米管的几何构型可以使其在各种应用中使用。本文证明了预处理电解质溶液的方法会显着影响阳极纳米管的生长。研究通常会忽略预处理,但预处理是控制纳米管生长的关键且不可忽略的因素。结果表明,磁力搅拌和超声搅拌有利于溶液中离子物质的溶解和质量传递,从而形成均匀的溶液和高TiO 2纳米管的增长率。通过简单的密封将溶液从与大气的广泛接触中分离出来,进一步提高了生长速率。这归因于湿气吸收的阻碍,其阻碍了溶液的原始水含量,因此导致形成初始的致密氧化物层,从而防止了离子扩散。这些发现可以作为电解质预处理路线的指南,以研究纳米管的生长机理并针对不同的应用定制纳米管的功能。
更新日期:2018-02-13
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