Sonochemical fabrication of fluorinated mesoporous titanium dioxide microspheres |
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| Authors: | Changlin Yu Jimmy C. Yu Mui Chan |
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| Affiliation: | a School of Materials and Chemical Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou 341000, Jiangxi, PR China
b Department of Chemistry, The Center of Novel Functional Molecules and Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China |
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| Abstract: | A sonochemical-hydrothermal method for preparing fluorinated mesoporous TiO2 microspheres was developed. Formation of mesoporous TiO2 and doping of fluorine was achieved by sonication and then hydrothermal treatment of a solution containing titanium isopropoxide, template, and sodium fluoride. The as-synthesized TiO2 microspheres were characterized by X-ray diffraction (XRD), Fourier translation infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, photoluminescence spectroscopy (PL), and BET surface areas. The P123 template was removed completely during the hydrothermal and washing steps, which was different from the conventional calcination treatment. The as- synthesized TiO2 microspheres had good crystallinity and high stability. Results from the photocatalytic degradation of methylene blue (MB) showed that fluorination could remarkably improve the photocatalytic activity of titanium dioxide. |
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| Keywords: | TiO2 microspheres Ultrasonic irradiation Fluorination Hydrothermal treatment Photocatalysis |
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