浸渍-分解法制备高可见光催化活性的Bi2O3/TiO2纳米管阵列

doi:10.3866/PKU.WHXB201207041

Abstract

Abstract:

Bi₂O₃/TiO₂ nanotube arrays (NTs) were prepared by depositing Bi₂O₃ nanoparticles (NPs) onto the tube wall of self-organized TiO₂ NTs using an impregnation-decomposition method. Chemical composition of the resulting Bi₂O₃/TiO₂ NTs was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. Photocatalytic activity was evaluated by degradation of aqueous methyl orange (MO) solution under visible-light irradiation (λ>400 nm). The Bi₂O₃ nanoparticles were found to be uniformly deposited into the nanotubes. Bi₂O₃/TiO₂ NTs exhibited much higher visible-light activity than pure Bi₂O₃ films and N-TiO₂ NTs, which was attributed to synergistic effects of the strong visible-light absorption of Bi₂O₃/TiO₂ NTs and the heterojunction formed between Bi₂O₃ and TiO₂.

Key words: Bi₂O₃/TiO₂ nanotube array, Visible light, Photocatalysis, Heterojunction, Synergetic effect

MSC2000:

O644

DAI Gao-Peng, LIU Su-Qin, PENG Rong, LUO Tian-Xiong. Fabrication of Bi₂O₃/Bi₂O₃ Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method[J].Acta Phys. -Chim. Sin., 2012, 28(09): 2169-2174.

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Fabrication of Bi₂O₃/Bi₂O₃ Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method

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Fabrication of Bi2O3/Bi2O3 Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method

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Fabrication of Bi₂O₃/Bi₂O₃ Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method