Superhydrophilic and Highly Transparent TiO2 Films Prepared by Dip Coating for Photocatalytic Degradation of Methylene Blue

被引：15
作者：
Zhang, Hong [1 ]
Liu, Yinchun [1 ]
Wu, Yibing [1 ]
Ruan, Kaibin [1 ]
机构：
[1] Fujian Agr & Forestry Univ, Coll Elect & Mech Engn, Fuzhou 350002, Fujian, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2015年 / 15卷 / 03期
关键词：
TiO2; Films; Superhydrophilicity; Transparency; Photocatalysis; THIN-FILMS; OPTICAL-PROPERTIES; NANOPARTICLES; COMPOSITE; PROPERTY; ANATASE; DESIGN; LAYER;
D O I：
10.1166/jnn.2015.9819
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nanocrystalline TiO2 films were prepared on slide glass by sol gel and dip-coating methods, and the samples were then annealed at 200 degrees C, 250 degrees C, 300 degrees C, 350 degrees C, 400 degrees C, 450 degrees C and 500 degrees C for 2 h. The samples' crystal structures, morphology, water contact angle, transmission spectra, and photocatalytic performance with respect to the degradation of methylene blue (MB) under UV light irradiation were characterized by X-ray diffraction spectroscopy, scanning electron microscopy, contact angle measurement, and UV-vis spectrophotometry. The results obtained indicate that all of the films were highly transparent to the visible spectrum, but with an increase in the annealing temperature, the optical band-gap and the water contact angle both reduced. Samples annealed at 450 degrees C and 500 degrees C exhibited superhydrophilic properties, with the hydrophilicity of the films remaining stable for at least 6 months without UV light irradiation. Among all the samples, the one annealed at 450 degrees C was found to have the highest maximum MB degradation rate of 71.1%.
引用
收藏
页码：2531 / 2536
页数：6
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