Hongzhang Deng, Peiwen Xiao, Liqiang Yang, Jianhui Luo, Meiying He, Pingmei Wang, Bo Jiang, Bo Xiao
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引用次数: 0
Abstract
Sol-gel and dip-coating are common methods for preparing TiO2 thin films. However, due to the incomplete hydrolysis of the precursor, the surface of TiO2 nanoparticles still contains a lot of alkoxy groups, which has an adverse effect on the wettability of TiO2 films. In this work, superhydrophilic TiO2 films with enhanced photocatalytic performance were prepared by chemical modification of TiO2 sol. FTIR spectroscopy and TGA verified that the carboxyl group was successfully grafted onto the surface of TiO2 nanoparticles after two steps of modification. With the increase of the amount of modified reagents, the hydrophilic and photocatalytic properties of the film were gradually enhanced. When the mass of 3-triethoxysilylpropylamine (KH550) used reached 50% of the dry weight of TiO2 (T-50), the film showed superhydrophilic and excellent photocatalytic properties. The enhanced wettability and photocatalytic performance make the modified TiO2 films have greater advantages in the field of self-cleaning.
Graphical Abstract
TiO2 films with enhanced hydrophilic and photocatalytic properties were obtained by two-step chemical modification of sol and dip coating.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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