Preparation and Properties of Activated Carbon Supported Nitrogen Doped Visible-light Response TiO2-xNy/AC Photocatalysts

doi:10.3724/SP.J.1077.2008.00464

Abstract

Abstract: An efficient visible-light response composite photocatalyst TiO_2-xN_y/AC was prepared by calcination of the mixture of TiO₂ precursor made by acid catalyzed hydrolysis method and actived carbon (AC) in NH₃ /N₂atmosphere. Photocatalytic activity was investigated through the photocatalytic degradation of phenol. The separability of TON/AC was determined by gravity
sedimentation. X-ray photoelectron spectroscope, X-ray diffraction, diffuse reflectance spectroscope, Fourier transform infrared spectroscope, scanning electron microscope and N₂adsorption isotherm were used for catalyst characterization. The results show that anion N is incorporated into TiO₂ lattice and substitutes part of O. TON/AC with suitable N-doping
exhibits high activity under ultraviolet light, visible light and solar light irradiation. Also, TON/AC exhibits better decantability and less deactivation. Doped-N can form a new band gap above the valence band of TiO₂ which can extend the adsorption edge to 450--550nm. In addition, Actived carbon support is beneficial to the high dispersion and large surface area of N-doped TiO₂.

Key words: TiO₂, nitrogen doped, activated carbon, photocatalytic

CLC Number:

O643

CHEN Xiao-Yun,LIU Shou-Xin,ZHANG Xian-Quan. Preparation and Properties of Activated Carbon Supported Nitrogen
Doped Visible-light Response TiO_2-xN_y/AC Photocatalysts[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00464.

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Preparation and Properties of Activated Carbon Supported Nitrogen
Doped Visible-light Response TiO_2-xN_y/AC Photocatalysts

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