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Shape-selective synthesis of Bi2WO6 hierarchical structures and their morphology-dependent photocatalytic activities

机译：BI2WO6层次结构的形状选择性合成及其形态学的光催化活动

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摘要

Various morphologies of Bi2WO6 including packed nanoplates, three dimensional (3D) hierarchical flower-like and clew-like microspheres were successfully synthesized through a simple hydrothermal route using L-lysine as a structure-directing agent. It was found that the morphological modulation of the as-prepared products could be easily realized by adjusting the solution pH values of the precursors. On the basis of a series of time-dependent experiments, the possible mechanisms for the formation of three different structures were proposed. The photocatalytic activities of the different morphologies of Bi2WO6 were evaluated by photodegradation of Rhodamine B (RhB) solution under visible light irradiation (lambda > 400 nm). In comparison with clew-like and plate-like Bi2WO6 structures, Bi2WO6 with a hierarchical flower-like architecture exhibited the highest visible-light-photocatalytic activity. The enhanced photocatalytic activity could be mainly ascribed to the unique structural features of flower-like microspheres with hierarchical architectures.
机译：通过使用L-赖氨酸作为结构引导剂，通过简单的水热途径成功地合成了包括填充纳米层，包括填充纳米板的各种形态，包括填充纳米层，三维（3D）等级花样和线相米的微球。发现通过调节前体的溶液pH值，可以容易地实现原制备产品的形态调制。在一系列时间依赖实验的基础上，提出了形成三种不同结构的可能机制。通过在可见光照射（Lambda> 400nm）下的罗丹明B（RHB）溶液的光降解来评估BI2WO6的不同形态的光催化活性。与CLEW样和板状BI2WO6结构相比，BI2WO6具有分层花样的架构，表现出最高的可见光光催化活性。增强的光催化活性可以主要归因于具有等级架构的花样微球的独特结构特征。

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  • 来源
    《RSC Advances》 |2016年第83期|共8页
  • 作者

    Lv Hua; Liu Yumin; Guang Jing; Ding Zhiwei; Wang Jianji;

  • 作者单位

    Henan Normal Univ Minist Educ Key Lab Green Chem Media &

    React Collaborat Innovat Ctr Henan Prov Green Mfg Fine Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Minist Educ Key Lab Green Chem Media &

    React Collaborat Innovat Ctr Henan Prov Green Mfg Fine Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Minist Educ Key Lab Green Chem Media &

    React Collaborat Innovat Ctr Henan Prov Green Mfg Fine Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Minist Educ Key Lab Green Chem Media &

    React Collaborat Innovat Ctr Henan Prov Green Mfg Fine Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Minist Educ Key Lab Green Chem Media &

    React Collaborat Innovat Ctr Henan Prov Green Mfg Fine Xinxiang 453007 Henan Peoples R China;

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