Hydrothermal synthesis of 3D TiO2 nanostructures using nitric acid: Characterization and evolution mechanism

Date

2016-4

Author

Erdogan, Nursev
Öztürk, Abdullah
Park, Jongee

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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 degrees 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 degrees 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 ruffle TiO2 could be obtained by hydrothermal synthesis at 8M HNO3 concentration at 140 degrees C for 3 h using protonated Htitanate nanoribbons. A probable mechanism for the evolution of 3D ruffle lotus structure was highlighted.

Subject Keywords

TiO2, Hydrothermal process, Crystal growth, Nanostructured materials, Nitric acid

URI

https://hdl.handle.net/11511/28574

Journal

Ceramics International

DOI

https://doi.org/10.1016/j.ceramint.2015.12.148

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

N. Erdogan, A. Öztürk, and J. Park, “Hydrothermal synthesis of 3D TiO2 nanostructures using nitric acid: Characterization and evolution mechanism,” Ceramics International, pp. 5985–5994, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28574.