Obtaining Ultra-High Surface Area TiO₂ Nanorods via Hydrothermally Transformation of Elongated Titanate Nanotubes

Abstract:

In this paper, a tunable TiO₂ nanorod cross-link structure with ultra-high surface area (up to 109.81 m²/g) has been successfully prepared via hydrothermally treating elongated sodium titanate nanotubes. XRD, SEM, HRTEM and BET analysis were employed to characterize the morphology and inner structure of the samples. The preparation conditions (the hydrothermal temperatures and the pH values of the solutions) of the obtained TiO₂ products were systematically studied. The maximum length of nanorod reaches to 1 μm while the lateral size could be limited less than 10 nm. The surface area can be easily tuned by modifying the stirring rate during the hydrothermal process. In addition, the photocatalytic performance of synthesized TiO₂ nanorods were also measured, and the nanorod structure with ultra-high surface area showed much better photocatalytic activity than the sample produced without stirring process, which can be attributed to the influence of the large difference in specific surface area of the obtained TiO₂ products.

• Periodical: Journal of Nano Research (Volume 51)
• Pages: 13-23
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.51.13
• Online since: February 2018
• Authors: Song Dong Yuan, Shi Qiang Chen, Xing Zhu, Peng Xiong, Yan Fei Yang, Zhi Hai Hu, Jian Xiong*
• Keywords: High Surface Area, Photocatalytic Activity, Stirring Hydrothermal Approach, TiO₂ Nanorods

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