Graphical abstract<'/> Hydrothermal synthesis of BiVO_4/TiO_2 composites and their application for degradation of gaseous benzene under visible light irradiation
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Hydrothermal synthesis of BiVO_4/TiO_2 composites and their application for degradation of gaseous benzene under visible light irradiation

机译：BiVO_4 / TiO_2复合材料的水热合成及其在可见光下降解气态苯的应用

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Graphical abstractBiVO4/TiO2has been synthesized via a sol-gel method and a facile hydrothermal route by adjusting the precursor hydrolysis rate with the use of different acids (CH3COOH, HNO3and H2SO4). The influence of these acids on the physicochemical characteristics and photocatalytic performance is investigated. BiVO4/TiO2synthesized in CH3COOH has better photocatalytic activity for the degradation of gaseous benzene than that in HNO3and H2SO4under visible light irradiation. Results of XPS measurement demonstrate that more active hydroxyl groups in BiVO4/TiO2-CH3COOH could lead to higher photocatalytic activity.Display OmittedHighlights•BiVO4/TiO2composites are synthesized via a sol-gel method and a facile hydrothermal route.•The precursor hydrolysis rate is controlled with different acids (CH3COOH, HNO3and H2SO4).•The acid has an important effect on the physicochemical properties and photocatalytic activity.•BiVO4/TiO2prepared in CH3COOH shows the best activity toward the degradation of benzene.•More active hydroxyl groups in BiVO4/TiO2-CH3COOH could lead to higher photocatalytic activity.AbstractBenzene is currently recognized as one of the most toxic contaminants. Our previously published study revealed that BiVO4/TiO2is an excellent photocatalyst toward the degradation of benzene. Herein, BiVO4/TiO2has been synthesized via a sol-gel method and a facile hydrothermal route by adjusting the precursor hydrolysis rate with the use of different acids (CH3COOH, HNO3and H2SO4). The influence of these acids on the physicochemical characteristics and photocatalytic performance is discussed in detail. X-ray diffraction and N2sorption analyses confirm that acid has an important effect on the crystalline composition and BET specific surface area. BiVO4/TiO2synthesized in CH3COOH has better photocatalytic activity for the degradation of gaseous benzene than that in HNO3and H2SO4under visible light irradiation. Results of XPS measurement demonstrate that the hydroxyl group in BiVO4/TiO2-CH3COOH is more abundant than that in BiVO4/TiO2-HNO3and BiVO4/TiO2-H2SO4. The photocurrent signal is investigated by electrochemical measurement, which indicates that more effective separation of photogenerated carriers occurs in the BiVO4/TiO2/CH3COOH system. It is hoped that our work can offer valuable information on the design of TiO2composites with enhanced properties.
机译： 图形摘要 < ce：simple-para id =“ spar0050” view =“ all”> BiVO 4 / TiO 2 已通过溶胶-凝胶法和简便的水热路线通过使用不同的酸（CH 3 COOH， HNO 3 和H 2 SO 4 < / ce：inf>）。研究了这些酸对理化特性和光催化性能的影响。 BiVO 4 / TiO 2 在CH 中合成3 COOH对气态苯的降解具有比HNO 3 和H 2 SO 4 在可见光照射下。 XPS测量结果表明，BiVO 4 / TiO 2 -CH中的羟基更活泼 3 COOH可以提高光催化活性。 省略显示 突出显示 • BiVO 4 / TiO 2 复合材料是通过溶胶-凝胶法和简便的热液路线合成的。 • 水解前体sis速率由不同的酸（CH 3 COOH，HNO 3 和H 2 SO 4 ）。 < ce：list-item id =“ lsti0015”> • 酸对物理化学性质和光催化性能具有重要影响活动。 • BiVO 4 / TiO 2 在CH 3 COOH对苯的降解表现出最好的活性。 < ce：label>• BiVO 4 /中的更多活性羟基TiO 2 -CH 3 COOH可以提高光催化活性。 摘要 4 / TiO 2 是降解的优良光催化剂。苯在此，BiVO 4 / TiO 2 已通过溶胶-凝胶法和通过使用不同的酸（CH 3 COOH，HNO 3 和H 2 SO 4 ）。详细讨论了这些酸对理化特性和光催化性能的影响。 X射线衍射和N 2 吸附分析证实，酸对晶体组成和BET比表面积具有重要影响。 BiVO 4 / TiO 2 在CH 中合成3 COOH对气态苯的降解具有比HNO 3 和H 2 SO 4 在可见光照射下。 XPS测量结果表明，BiVO 4 / TiO 2 -CH < ce：inf loc =“ post”> 3 COOH比BiVO 4 / TiO 2 -HNO 3 和BiVO 4 / TiO 2 -H 2 SO 4 。通过电化学测量研究了光电流信号，这表明在BiVO 4 / TiO 2 / CH 3 COOH系统。希望我们的工作可以为设计具有增强性能的TiO 2 复合材料提供有价值的信息。

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  • 来源
    《Applied Surface Science》 |2018年第1期|319-326|共8页
  • 作者

    Yin Hu; Wei Chen; Jianping Fu; Mingwei Ba; Fuqian Sun; Peng Zhang; Jiyong Zou;

  • 作者单位

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

    Research Institute of Applied Chemistry, Jiangxi Academy of Sciences;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Photocatalysis; CH3COOH; Visible light; Benzene; BiVO4/TiO2;

    机译：光催化;CH3COOH;可见光;苯;BiVO4 / TiO2;

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