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首页> 外文期刊>Materials Science and Engineering >Facile synthesis and enhanced visible-light photocatalytic activity of microanostructured Ag_2ZnGeO_4 hollow spheres
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Facile synthesis and enhanced visible-light photocatalytic activity of microanostructured Ag_2ZnGeO_4 hollow spheres

机译：微纳米结构Ag_2ZnGeO_4空心球的简便合成及增强的可见光催化活性

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摘要

Microanostructured Ag_2ZnGeO_4 hollow spheres were successfully synthesized by a one-step and low-temperature route under ambient pressure. The microanostructured Ag_2ZnGeO_4 hollow spheres have a diameter of 1 -2 μm and their shells are composed of numerous nanoparticles and nanorods. The growth process of the microanostructured Ag_2ZnGeO_4 hollow spheres was investigated in detail. The results indicated that the morphologies and composition of Ag_2ZnGeO_4 samples were strongly dependent on the dose of the AgNO_3 and reaction time. Excessive AgNO_3 was favorable for the nucleation and growth rate of Ag_2ZnGeO_4 crystals and the formation of pure Ag_2ZnGeO_4. Moreover, the formation mechanism of the microanostructured Ag_2ZnGeO_4 hollow spheres is related to the Ostwald ripening. Under the same conditions, the photocatalytic activity of microanostructured Ag_2ZnGeO_4 hollow spheres is about 1.7 times and 11 times higher than that of bulk Ag_2ZnGeO_4 and Degussa P25, respectively. These interesting findings could provide new insight on the synthesis of microanostructured ternary-metal oxides with enhanced photocatalytic activity.
机译：通过一步法和低温途径在环境压力下成功地合成了微/纳米结构的Ag_2ZnGeO_4空心球。微米/纳米结构的Ag_2ZnGeO_4空心球的直径为1-2μm，它们的壳由许多纳米颗粒和纳米棒组成。详细研究了微/纳米结构的Ag_2ZnGeO_4空心球的生长过程。结果表明，Ag_2ZnGeO_4样品的形貌和组成强烈依赖于AgNO_3的剂量和反应时间。过量的AgNO_3有利于Ag_2ZnGeO_4晶体的成核和生长速率以及纯Ag_2ZnGeO_4的形成。此外，微/纳米结构的Ag_2ZnGeO_4空心球的形成机理与Ostwald熟化有关。在相同条件下，微/纳米结构的Ag_2ZnGeO_4空心球的光催化活性分别比本体Ag_2ZnGeO_4和Degussa P25高1.7倍和11倍。这些有趣的发现可以为合成具有增强的光催化活性的微/纳米结构三元金属氧化物提供新的见解。

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  • 来源
    《Materials Science and Engineering》 |2015年第3期|198-205|共8页
  • 作者

    Jin Liu; Gaoke Zhang;

  • 作者单位

    School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, PR China,The Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University, Zhoukou 466001, PR China;

    School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ag_2ZnGeO_4; Hollow sphere; Visible-light; Photocatalytic;

    机译：Ag_2ZnGeO_4;空心球可见光;光催化;

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