Analysis of the Surface Adsorbed Organics of Nanosized TiO2 Photocatalyst with High Visible-Light Photocatalysis Activity by Ultrasonic Treatment under Water and Ethanol Solution

Guan Qin Chen; Zhang Lian Hong

doi:10.4028/www.scientific.net/KEM.336-338.2304

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 336-338Analysis of the Surface Adsorbed Organics of...

Analysis of the Surface Adsorbed Organics of Nanosized TiO₂ Photocatalyst with High Visible-Light Photocatalysis Activity by Ultrasonic Treatment under Water and Ethanol Solution

Abstract:

Low frequency ultrasonic treatment was applied to desorb surface organics from the surface of nanosized TiO2 photocatalyst, which was prepared by hydrothermal method using a mixture of different amounts of Ti(OBu)4, ethanol, acetone and pyridine raw materials. The UV-Vis, TG-DTA and GC-MS analysis were used to investigate the surface organics. It was found that the absorption intensity around 250nm in UV-Vis spectra of the upper transparent solution, which represents the amount of organics desorbed from the TiO2 surface, increased with increasing treatment time. Along with the TG-DTA and GC-MS analysis, the kinds and amounts of partial surface organics were roughly clarified, and these organics may correspond with the photocatalytic degradation rate for methyl orange (MO) solution under visible light irradiation (≥450nm).

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Key Engineering Materials (Volumes 336-338)

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2304-2307

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https://doi.org/10.4028/www.scientific.net/KEM.336-338.2304

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April 2007

Authors:

Guan Qin Chen, Zhang Lian Hong

Keywords:

Hydrothermal Method, Organic, Photocatalytic, Titania (TiO₂), Ultrasonic Treatment

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