Hydrothermal synthesis of 3D TiO2 nanostructures using nitric acid: Characterization and evolution mechanism |
| |
| Affiliation: | 1. Middle East Technical University, Metallurgical and Materials Engineering Department, Ankara, Turkey;2. Atilim University, Metallurgical and Materials Engineering Department, Ankara, Turkey;1. Department of Mechanics, Damavand Branch, Islamic Azad University, Damavand, Iran;2. Advanced Materials Research center, Faculty of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran;3. Department of Mathematics, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, PR China;2. Graduate School of Chinese Academy of Science, Beijing 100039, PR China;1. School of Materials Science and Technology, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, China;2. Laboratory of Crystal Physics, Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia;3. Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia;1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China;2. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China |
| |
| Abstract: | Various morphologies of TiO2 nanostructures were synthesized by HNO3 assisted hydrothermal treatment with respect to the acid molarity (1 M, 3 M, and 8 M), temperature (110, 140, and 180 °C), and time (1, 3, and 6 h). An additional sample was synthesized inside the protonated titanate nanoribbon coated vessel with the acid molarity of 8M at 140 °C for 3 h. The crystal structure and morphology of the nanostructures synthesized were investigated using X-Ray diffractometer, scanning electron microscope, and transmission electron microscope. The results revealed that lower acid concentrations, longer synthesis durations and higher temperatures favored anatase phase formation. Meanwhile, a phase pure 3D lotus structure rutile TiO2 could be obtained by hydrothermal synthesis at 8M HNO3 concentration at 140 °C for 3 h using protonated H-titanate nanoribbons. A probable mechanism for the evolution of 3D rutile lotus structure was highlighted. |
| |
| Keywords: | Hydrothermal process Crystal growth Nanostructured materials Nitric acid |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
