Controllable synthesis of anatase titanium dioxide nanowires with high-temperature stability

• Published in: Journal of materials science Vol. 57; no. 20; pp. 9164 - 9171
• Main Authors: Jing, Yuhan, Wang, Jie, Li, Ting, Lu, Jianchen, Li, Zhi, Xiao, Zechen, Ye, Qianxu, Zhou, Liexing, Cai, Jinming
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2022; Springer; Springer Nature B.V
• Subjects: Anatase; Characterization and Evaluation of Materials; Chemical Routes to Materials; Chemistry and Materials Science; Classical Mechanics; Crystal structure; Crystallography and Scattering Methods; Crystals; Diffraction; Electron microscopy; Gas sensors; High temperature gases; Hydrothermal crystal growth; Hydroxides; Materials Science; Microscopy; Nanowires; Photoelectrons; Polymer Sciences; Powders; Sensors; Single crystals; Sodium hydroxide; Solid Mechanics; Structure; Synthesis; Titanium; Titanium dioxide; X-ray spectroscopy; X-rays
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-022-07231-7

Pure anatase TiO 2 can survive at more than 850 °C. Anatase TiO 2 has great potential to be used in self-cleaning ceramics and high-temperature gas sensors. However, these two applications require the crystal structure of anatase TiO 2 to have high-temperature stability. Here, we demonstrate the controllable synthesis of anatase TiO 2 nanowires with excellent high-temperature stability by the hydrothermal method, in which titanium powders and sodium hydroxides act as reactants. The morphology and crystal structure of the anatase TiO 2 nanowires were characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and x-ray photoelectron spectroscopy. The results show that the prepared anatase TiO 2 nanowires are single-crystal nanowires and can maintain its crystal structure at 850 °C. Its high-temperature stability exceeds that of anatase TiO 2 reported in all studies by the hydrothermal method.