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首页> 外文期刊>RSC Advances >Facile synthesis of Ag2O/N-doped helical carbon nanotubes with enhanced visible-light photocatalytic activity
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Facile synthesis of Ag2O/N-doped helical carbon nanotubes with enhanced visible-light photocatalytic activity

机译：增强可见光光催化活性Ag2O / N掺杂螺旋碳纳米管的容易合成

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摘要

Novel Ag2O/N-doped helical carbon nanotubes (Ag2O/N-HCNTs) were successfully synthesized via a simple coprecipitation method and were well characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). The photocatalytic activities were evaluated in the degradation of methylene blue (MB) aqueous solution. The results showed that Ag2O nanoparticles sized 3-10 nm were highly anchored on the surface and inner tubes of the N-HCNTs support, and significantly enhanced the visible-light photocatalytic activity compared to bare Ag2O. It was attributed to the combined effects, including highly dispersed smaller Ag2O particles and higher charge separation efficiency. The possible mechanism for the photocatalytic activity of Ag2O/N-HCNTs was also tentatively proposed. In particular, the rate of degradation of the as-prepared Ag2O/N-HCNTs was 3.9 times faster than that of using bare Ag2O nanoparticles under visible light irradiation. Furthermore, the Ag2O/N-HCNTs could be easily recycled in visible photocatalytic activity. In addition, the Ag2O/N-HCNTs could also degrade MB dye in different water sources like Changjiang River water and tap water with high efficiency as well as in deionized water and that will greatly promote their application in the area of environmental remediation.
机译：通过简单的共沉淀法成功地合成了新型Ag2O / N掺杂的螺旋碳纳米管（Ag2O / N-HCNT），并通过X射线衍射（XRD），现场发射扫描电子显微镜（FeSEM），透射电子显微镜（ TEM）和能量分散X射线光谱（EDS）。在亚甲基蓝（MB）水溶液的降解中评价光催化活性。结果表明，与裸均值相比，Ag2O纳米颗粒大小高度锚固在N-HCNT载体的表面和内管上，并显着增强了可见光光催化活性。它归因于组合效果，包括高度分散的较小的Ag2O颗粒和更高的电荷分离效率。提出了Ag2O / N-HCNT的光催化活性的可能机制。特别地，制备的Ag 2 O / N-HCNT的降解速率比在可见光照射下使用裸脂纳米颗粒的速度快3.9倍。此外，Ag 2 O / N-HCNT可以容易地再循环在可见光催化活性中。此外，Ag2O / N-HCNT还可以降解像长江水的不同水源中的MB染料，并以高效率和去离子水自来水，并将大大促进其在环境修复领域的应用。

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  • 来源
    《RSC Advances》 |2015年第5期|共8页
  • 作者

    Xue Jinjuan; Ma Shuaishuai; Zhou Yuming; Zhang Zewu; Wu Xin; She Chenguang;

  • 作者单位

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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