Preparation of Gold-Modified Nitrogen-Doped TiO2 and Its Visible Light Photocatalytic Activity

doi:10.7517/j.issn.1674-0475.2011.05.353

Abstract

Abstract: N-doped TiO₂ was obtained from nanotube titanic acid and aqueous ammonia by hydrothermal method,and then gold-modified N-doped TiO₂ was prepared using deposition-precipitation method to deposit Au on the surface of N-doped TiO₂.The physicochemical properties of resultant N-doped or Au/N-doped TiO₂ samples were investigated by means of transmission electron microscopic(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),diffuse reflectance spectra(DRS),and electron spin resonance(ESR).The photocatalytic activity was evaluated by monitoring oxidation of propylene under visible light irradiation.Results indicated that N-TiO₂ and Au/N-TiO₂ showed obviously the visible light(λ≥420 nm) photocatalytic activity.The visible light sensitization was ascribed to the formation of single-electron-trapped oxygen vacancies.

Key words: TiO₂, Au, N-doped, visible light, photocatalytic activity

CLC Number:

JING Ming-jun, WANG Yan, ZHANG Min, YANG Jian-jun. Preparation of Gold-Modified Nitrogen-Doped TiO₂ and Its Visible Light Photocatalytic Activity[J]. Imaging Science and Photochemistry, 2011, 29(5): 353-363.

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Preparation of Gold-Modified Nitrogen-Doped TiO₂ and Its Visible Light Photocatalytic Activity

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