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首页> 外文期刊>RSC Advances >Hollow and mesoporous ZnTe microspheres: synthesis and visible-light photocatalytic reduction of carbon dioxide into methane
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Hollow and mesoporous ZnTe microspheres: synthesis and visible-light photocatalytic reduction of carbon dioxide into methane

机译：中空和中孔Znte微球：合成和可见光光催化将二氧化碳还原成甲烷

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摘要

Hollow and mesoporous microstructures have been found to be an attractive class of materials due to their superior physical properties and potential applications. In the present work, a hydrothermal method has been used to synthesize hollow and mesoporous ZnTe hierarchical microspheres. The as-synthesized microspheres are characterized by a variety of techniques, including X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and ultraviolet-visible spectroscopy. Nitrogen adsorption-desorption measurements and the curve of relative pore size distribution via Brunauer-Emmett-Teller analysis confirm the existence of mesopores in the obtained nanomaterials. Different reaction parameters such as NaOH concentration, reaction temperature and time, and concentration of the tellurium precursor have been studied and the detailed growth mechanism has been proposed. These hollow and mesoporous microspheres are also used for the photoreduction of carbon dioxide into methane under visible-light illumination (lambda >= 420 nm) with a solar energy conversion efficiency of 0.072%.
机译：由于其优越的物理性质和潜在应用，已经发现中空和中孔微观结构是一种吸引人的材料。在本作工作中，已经使用水热法合成中空和中孔ZnTe等级微球。作为合成的微球的特征在于各种技术，包括X射线衍射，扫描电子显微镜，能量分散X射线光谱，透射电子显微镜，高分辨率透射电子显微镜，X射线光电子体光谱和紫外线可见光谱。通过Brunauer-Emmett-excuals分析的氮吸附 - 解吸测量和相对孔径分布的曲线证实了所得纳米材料中的中孔的存在。已经研究了不同的反应参数，例如NaOH浓度，反应温度和时间，以及碲前体的浓度，并提出了详细的生长机制。这些中空和介孔的微球还用于在可见光照射（Lambda> = 420nm）下将二氧化碳的光电拍摄到甲烷中，太阳能转化效率为0.072％。

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  • 来源
    《RSC Advances》 |2015年第8期|共9页
  • 作者

    Ehsan Muhammad Fahad; Ashiq Muhammad Naeem; He Tao;

  • 作者单位

    Natl Ctr Nanosci &

    Technol Lab Nanosyst &

    Hierarch Fabricat Beijing 100190 Peoples R China;

    Natl Ctr Nanosci &

    Technol Lab Nanosyst &

    Hierarch Fabricat Beijing 100190 Peoples R China;

    Natl Ctr Nanosci &

    Technol Lab Nanosyst &

    Hierarch Fabricat Beijing 100190 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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