CTAB-assisted synthesis of mesoporous F-N-codoped TiO2 powders with high visible-light-driven catalytic activity and adsorption capacity |
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Authors: | Yi Xie Xiujian Zhao Yuanzhi Li Qingnan Zhao Xuedong Zhou Qihua Yuan |
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Institution: | Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology, Ministry of Education, Wuhan, Hubei 430070, PR China |
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Abstract: | This article describes the preparation of mesoporous rod-like F-N-codoped TiO2 powder photocatalysts with anatase phase via a sol-gel route at the temperature of 373 K, using cetyltrimethyl ammonium bromide (CTAB) as surfactant. The as-prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectra (UV-vis DRS). The results showed that the photocatalysts possessed a homogeneous pore diameter and a high surface area of 106.3-160.7 m3 g−1. The increasing CTAB reactive concentration extended the visible-light absorption up to 600 nm. The F-N-codoped TiO2 powders exhibited significant higher adsorption capacity for methyl orange (MO) than that of Degussa P25 and showed more than 6 times higher visible-light-induced catalytic degradation for MO than that of P25. |
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Keywords: | Mesoporous TiO2 F-N-codoping Visible light Photocatalysis Surfactant Adsorption |
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