In order to explore wider application of porous anodic alumina and anodic TiO₂ nanotubes (ATNTs), the formation mechanism research of porous anodic materials plays a more significant role. Traditional field-assisted dissolution theory has been put into question and oxygen bubble mold has been accepted gradually. However, it is difficult to prove oxygen release. In this work, we present a method to demonstrate the presence of oxygen in the pores of nanotubes. A kind of water soluble reducing agent (NH₄H₂PO₂) was added into electrolyte containing NH₄F. Cavities exists not only between the double walls of nanotubes but also in the inner walls, which are different from normal nanotubes. The morphology evolution of nanotubes results from the reaction between NH₄H₂PO₂ and oxygen. Therefore, the release of oxygen during the formation of ATNTs was further proved.

为了探索多孔阳极氧化铝和阳极TiO ₂纳米管（ATNTs）的广泛应用，多孔阳极材料的形成机理研究起着更为重要的作用。传统的现场辅助溶出理论受到质疑，氧气气泡霉菌逐渐被接受。但是，很难证明有氧气释放。在这项工作中，我们提出了一种方法来证明纳米管的孔中存在氧气。将一种水溶性还原剂（NH ₄ H ₂ PO ₂）添加到含NH _4的电解质中F.空腔不仅存在于纳米管的双壁之间，而且还存在于内壁中，这与普通的纳米管不同。纳米管的形貌演变是由NH ₄ H ₂ PO ₂与氧之间的反应引起的。因此，进一步证明了在ATNT形成过程中氧的释放。