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首页> 外文期刊>Journal of Materials Research >Enhanced photocatalytic activities on Bi_2O_2CO_3/ZnWO_4 nanocomposites
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Enhanced photocatalytic activities on Bi_2O_2CO_3/ZnWO_4 nanocomposites

机译：增强的Bi_2O_2CO_3 / ZnWO_4纳米复合材料的光催化活性

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摘要

Bi_2O_2CO_3/ZnWO_4 composite photocatalysts have been successfully synthesized by a mixed calcination method after hydrothermal process. The catalysts were characterized by powder x-ray diffraction, scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, x-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectrum. The results showed that the hierarchical Bi_2O_2CO_3/ZnWO_4 nanocomposites were obtained by mixed grinding calcination method and Bi_2O_2CO_3 nanospheres grow on the primary ZnWO_4 particles. The Bi_2O_2CO_3/ZnWO_4 composites exhibit higher photocatalytic activities compared to pure ZnWO_4 and Bi_2O_2CO_3 particles under UV light irradiation. Furthermore, the excellent photocatalytic efficiency of the Bi_2O_2CO_3/ZnWO_4 composite was deduced closely related to Bi_2O_2CO_3/ZnWO_4 heterojunctions whose presence is generally regarded to be a favorable factor for the separation of photogenerated electrons and holes.
机译：经过水热处理后，采用混合煅烧法成功地合成了Bi_2O_2CO_3 / ZnWO_4复合光催化剂。通过粉末X射线衍射，扫描电子显微镜，透射电子显微镜，高分辨率透射电子显微镜，X射线光电子能谱和UV-可见漫反射光谱来表征催化剂。结果表明，通过混合研磨煅烧方法获得了分层的Bi_2O_2CO_3 / ZnWO_4纳米复合材料，Bi_2O_2CO_3纳米球生长在初级ZnWO_4颗粒上。与纯ZnWO_4和Bi_2O_2CO_3颗粒相比，Bi_2O_2CO_3 / ZnWO_4复合物在紫外光照射下具有更高的光催化活性。此外，推断出Bi_2O_2CO_3 / ZnWO_4复合材料的优异光催化效率与Bi_2O_2CO_3 / ZnWO_4异质结密切相关，后者通常被认为是分离光生电子和空穴的有利因素。

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  • 来源
    《Journal of Materials Research》 |2014年第5期|641-648|共8页
  • 作者

    Na Tian; Hongwei Huang; Yihe Zhang; Ying He;

  • 作者单位

    School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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