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Citation: KANG Chun-Li, WANG Yang, YU Hong-Bing, GUO Jing, LIN Xue-Yu. Characterization and Photocatalytic Activity of TiO₂ Thin Films Prepared by TiCl₄ Hydrolysis[J]. Chinese Journal of Applied Chemistry, ;2005, 22(4): 412-416. shu

Characterization and Photocatalytic Activity of TiO₂ Thin Films Prepared by TiCl₄ Hydrolysis

1.
a College of Environment and Resources, Jilin University, Changchun 130023;
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b Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Science, Changchun

Corresponding author: KANG Chun-Li,
Received Date: 28 July 2004
Available Online: 6 December 2004
Fund Project: 吉林省科委基金资助项目(20010422) (20010422)

Nanostructured TiO₂ thin films were fabricated on glass substrates by soaking the substrates in and lifting the substrates from TiO₂ colloids prepared via the hydrolysis of TiCl₄.The thin films were investigated by means of X-ray diffraction (XRD),scanning electron microscopy (SEM),and energy dispersion spectroscopy (EDS) to characterize the particle size and surface properties.UV absorption spectroscopy and the visible light transmission rate were employed to investigate the optical characteristics of the thin films.The photo-catalytic activity was determined by degrading acetic acid in aqueous solution.The results show that the mass of thin film was in good linear relationship with the number of coated layers,and the thin film with 4 coated layers and 0.192 μm in thickness with the diameter of TiO₂ particles being 0.5 nm can strongly absorb ultraviolet radiation,and the absorption band exhibited a red shift.The photocatalytic degradation rate of 500 mL of 20 mg/L acetic acid on the thin films was 75.9%,27.9% higher than the degradation rate of the same reaction catalyzed by the same amount of TiO₂ powder produced from the Sol-gel solution within 350 min,which demonstrates the higher photocatalytic activity of the thin films.
- hydrolysis of TiCl₄,
- TiO₂ thin film,
- photocatalytic activity,
- acetic acid
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Characterization and Photocatalytic Activity of TiO₂ Thin Films Prepared by TiCl₄ Hydrolysis