The aim of this article is to study the photodegradation, anticorrosion, antibacterial and antifungal properties of doped titanate nanotubes prepared by hydrothermal treatment using different metals: Ce, Fe, Zn and Zr. The main purpose of this work is to prove the possibility of using these nanotubes as a coating for surfaces capable of protecting these surfaces against corrosion, degrading the molecules adsorbed at their surfaces as well as eliminating any bacteria or fungi that can attack these surfaces. The textural and morphological properties of the nanopowders were determined by different analysis techniques such as: X-ray diffraction, reflection diffuse spectroscopy, thermogravimetric analysis, adsorption–desorption of N₂, Infrared spectroscopy and Raman spectroscopy. The results of the characterizations showed that nanotubes can be obtained with a hollow structure and an important thermal stability of whatever element nature. However, the photocatalytic test ends with the photodegradation under UV–Visible irradiation of the three industrial molecules: Malachite Green, Methyl Orange and Tannic Acid having different molecule charges. It was noted that the degradation rates of the order of 100% were obtained in fairly short times. However, the studied materials show an inhibitory power of fungi, bacteria and high anticorrosion activities in acid medium.

本文的目的是研究使用不同金属：Ce、Fe、Zn 和 Zr 通过水热处理制备的掺杂钛酸盐纳米管的光降解、防腐、抗菌和抗真菌性能。这项工作的主要目的是证明使用这些纳米管作为表面涂层的可能性，能够保护这些表面免受腐蚀，降解吸附在其表面的分子以及消除任何可以攻击这些表面的细菌或真菌。纳米粉末的结构和形态特性通过不同的分析技术确定，例如：X 射线衍射、反射漫射光谱、热重分析、N _{2 的}吸附-解吸、红外光谱和拉曼光谱。表征结果表明，无论元素性质如何，都可以获得具有中空结构和重要热稳定性的纳米管。然而，光催化测试以三种工业分子在紫外-可见光照射下的光降解结束：孔雀石绿、甲基橙和具有不同分子电荷的单宁酸。注意到在相当短的时间内获得了大约 100% 的降解率。然而，所研究的材料在酸性介质中显示出对真菌、细菌和高防腐活性的抑制能力。