Preparation and properties of a long time durable superhydrophilic titanium dioxide film obtained by a sol-gel process

Jianjun Zhang; Hao Zeng; Chun Liu; Chao Li; Sude Ma; Guangpu Lv

doi:10.3139/120.110969

Article

Preparation and properties of a long time durable superhydrophilic titanium dioxide film obtained by a sol-gel process

Jianjun Zhang , Hao Zeng , Chun Liu , Chao Li , Sude Ma and Guangpu Lv

Published/Copyright: December 22, 2016

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From the journal Materials Testing Volume 59 Issue 1

Abstract

The superhydrophilic phenomenon of titanium dioxide (TiO₂) has some potential applications. However, the superhydrophilicity can be obtained only using ultraviolet (UV) light irradiation and cannot be regained conveniently due to the energy band gap of TiO₂. In this study, superhydrophilic TiO₂ film on a glass substrate was prepared by a simple sol-gel method and the sol was doped with nitrogen, fluorine and polyethylene glycol (PEG). The preparation method was discussed and the film was characterized. Results show that the anatase TiO₂ was obtained at about 500 °C, and the redshift of nitrogen-doped film was the largest, whereas the transmittance of fluorine-doped film was increased. The sizes of TiO₂ particles in the films are uniform and the films are homogeneous except PEG-doped TiO₂. Superhydrophilicity of films doped with PEG can maintain 12 days and can be regained by the irradiation of sunlight.

Kurzfassung

Das Phänomen der Superhydrophilie von Titandioxid (TiO₂) hat einige potentielle Anwendungen. Sie lässt sich allerdings nur mittels Anregung durch ultraviolettes Licht (UV) erreichen und kann aufgrund der Energiebandlücke von TiO₂ nicht konventionell wieder hergestellt werden. In der diesem Beitrag zugrundeliegenden Forschungsarbeit wurde ein superhydrophiler TiO₂-Film auf einem Glassubstrat hergestellt, und zwar mittels eines einfachen Sol-Gel-Verfahrens, wobei die kolloidale Lösung mit Stickstoff, Fluo und Polyethylenglycol (PEG) dotiert wurde. Das Herstellungsverfahren wurde diskutiert und der Film charakterisiert. Die Ergebnisse zeigen, dass die Anatas-Struktur bei etwa 500 °C erreicht werden kann und dass die Rotverschiebung des Stickstoff-dotierten Films am größten war, während die Lichtdurchlässigkeit des Fluor-dotierten Films zunahm. Die Größe der TiO₂-Partikel im Film ist einheitlich und die Filme sind durchgehend, ausgenommen der PEG-dotierte Film. Die Superhydrophilie des PEG-dotierten Films kann 12 Tage anhalten und durch Anregung mittels Sonnenlicht wieder hergestellt werden.

*Correspondence Address, Dr. Sude Ma, Center for Advanced Materials and Energies, Xihua University, Chengdu 610039, P. R. China, E-mail: masude2007@163.com

Dr. Jianjun Zhang is Associate Professor of Materials Science and Engineering at the School of Materials Science and Engineering, Xihua University, Chengdu, China, with expertise in wear resistant materials. He received his PhD (2011) degree from Xi'an Jiaotong University, Xi'an, China. He joined Xihua University in 2012.

Hao Zeng, born 1993, is a master student of Material Sciences and Engineering at the Center for Advanced Materials and Energies, Xihua University, Chengdu, China. He received his Bachelor degree from Xihua University in 2015. In the same year, he joined Dr. Sude Ma's group. His research interest focuses on the preparation and applications of functional materials.

Chun Liu, born 1992, is a master student of Material Sciences and Engineering at the Center for Advanced Materials and Energies, Xihua University, Chengdu, China. He received his Bachelor degree from Xihua University in 2014. In the same year, he joined Dr. Sude Ma's group. His research interest focuses on the preparation and applications of functional materials.

Chao Li, born 1991, is a master student of Material Sciences and Engineering at the Center for Advanced Materials and Energies, Xihua University, Chengdu, China. He received his Bachelor degree from Xihua University in 2013. In the same year, he joined Dr. Sude Ma's group. His research interest focuses on the preparation and applications of functional materials.

Dr. Sude Ma, born 1976, is Associate Professor of Polymer Science and Engineering at the Center for Advanced Materials and Energies, Xihua University, Chengdu, China, with expertise in functional materials. He received his Master and PhD degrees from Xi'an Jiaotong University, Xi'an, China in 2003 and 2006, respectively, and conducted postdoctoral research at Tsinghua University, Beijing, China from 2008 to 2010. He joined Xihua University in 2011.

Guangpu Lv, born 1986, is a master student of Material Sciences and Engineering at Xi'an Sunward Aeromat Co., Ltd, China. He received his Master and Bachelor degrees from Xihua University, Chengdu, China in 2010 and 2008, respectively. His research interest focuses on the preparation, characterization and applications of functional materials.

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Published Online: 2016-12-22

Published in Print: 2017-01-05

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https://doi.org/10.3139/120.110969