Novel V2O5/BiVO4/TiO2 Nanocomposites with High Visible-Light-Induced Photocatalytic Activity for the Degradation of Toluene

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• 作者：Juanjuan Sun ; Xinyong Li ; Qidong Zhao ; Jun Ke ; Dongke Zhang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：May 15, 2014
• 年：2014
• 卷：118
• 期：19
• 页码：10113-10121
• 全文大小：630K
• 年卷期：v.118,no.19(May 15, 2014)
• ISSN：1932-7455

文摘

In an effort to develop nanostructured photocatalysts to achieve high performance in heterogeneous photocatalysis, a novel composite V₂O₅/BiVO₄/TiO₂ photocatalyst was successfully synthesized by using a sequentially hydrothermal and adhering method. The structural and optical properties of the as-prepared samples were comparatively characterized. The formed ternary nanojunctions were composed of TiO₂ nanobelts and V₂O₅/BiVO₄ nanorods which were self-assembled by smaller V₂O₅ and BiVO₄ nanoparticles. Compared to pure TiO₂ nanobelts and V₂O₅/BiVO₄ nanorods, the V₂O₅/BiVO₄/TiO₂ composite exhibited higher photocatalytic activity in decomposition of gaseous toluene under visible light irradiation (位 > 400 nm). Electron spin resonance examination confirmed that the photoinduced active species (^{鈥?/sup>OH and O₂鈥⑩€?/sup>) were involved in the photocatalytic degradation of toluene. A detailed mechanism accounting for the enhanced photocatalytic activity of the V₂O₅/BiVO₄/TiO₂ nanocomposite was proposed in terms of the energy band structures of the components. The rationally designed ternary nanojunctions could effectively enhance the photocatalytic performance by increasing photoinduced charge carriers through the charges separation across their multiple interfaces.}