Preparation of Fe3+ Doped High-Ordered TiO2 Nanotubes Arrays with Visible Photocatalytic Activities

Jin Zhang; Chen Yang; Shijie Li; Yingxue Xi; Changlong Cai; Weiguo Liu; Dmitriy Golosov; Sergry Zavadski; Siarhei Melnikov

doi:10.3390/nano10112107

Preparation of Fe³⁺ Doped High-Ordered TiO₂ Nanotubes Arrays with Visible Photocatalytic Activities

Nanomaterials (Basel). 2020 Oct 23;10(11):2107. doi: 10.3390/nano10112107.

Authors

Jin Zhang¹, Chen Yang¹, Shijie Li¹, Yingxue Xi¹, Changlong Cai¹, Weiguo Liu¹, Dmitriy Golosov², Sergry Zavadski², Siarhei Melnikov²

Affiliations

¹ Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710032, China.
² Belarusian State University of Informatics and Radioelectronics, Electronic Technique and Technology Department, Center 10.1, Thin Film Research Laboratory, 6 P. Brovka str., 220013 Minsk, Belarus.

Abstract

In this paper, the Fe³⁺ doped rutile phase TiO₂ nanotubes arrays (NTAs) were prepared in a low temperature water-assistant crystallization method. It is noteworthy that the Fe³⁺ doping hardly hinders either the crystallization of rutile TiO₂ NTAs or the highly-ordered nanotubular morphologies. Moreover, Fe³⁺ did not form other compound impurities, which indicated that Fe³⁺ substitute Ti⁴⁺ into the lattice of TiO₂. With the introduction of Fe³⁺, the light absorption range of TiO₂ NTAs extends from the ultraviolet band to the visible light range. Photocatalytic testing results indicate that Fe³⁺ doped TiO₂ NTAs can effectively improve the degradation rate of methyl orange aqueous solution in visible light, and the TiO₂ NTAs with 0.2 mol/L Fe³⁺ doping exhibits the highest photocatalytic degradation efficiency.

Keywords: Fe3+ doping; MO degradation; TiO2 nanotubes; visible photocatalysis.