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Phenol and Cr(VI) degradation with Mn ion doped ZnO under visible light photocatalysis

机译：苯酚和Cr（VI）用Mn离子掺杂ZnO降解可见光光催化下的ZnO

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摘要

Mn ion doped ZnO with different percentages of Mn content (Zn0.9Mn0.1O (1), Zn0.8Mn0.2O (2), Zn0.7Mn0.3O (3), and Zn0.6Mn0.4O (4)) was synthesized via a solution combustion method, with urea used as the fuel. The optical, morphological, and structural properties were studied using Raman, UV-DRS, SEM, TEM, XPS, and powder XRD techniques. The average crystallite sizes of Zn1-xMnxO (1, 2, 3, 4), which are around 30-60 nm, were confirmed via powder X-ray diffraction studies, whereas transmission electron microscopy studies confirmed the formation of a ZnO wurtzite crystal phase. Scanning electron microscopy indicated the spherical morphology of the samples. Raman spectroscopy studies confirmed a decrease in oxygen vacancies with increasing Mn content, whereas confirmation of the doping of Mn ions into the ZnO lattice was obtained using X-ray photoelectron spectroscopy. The band gap energies of samples were calculated using UV-DRS spectroscopy, whereas BET surface area measurements confirmed the surface area. The visible light activity of Zn1-xMnxO (1, 2, 3, 4) was identified through studies of phenol degradation and Cr(VI) reduction under visible light photocatalysis, which highlight that Zn0.8Mn0.2O (2) shows the best activity. Typical degradation profiles indicated that the simultaneous degradation of pollutants is more effective than the removal of individual pollutants.
机译：合成Mn离子掺杂ZnO，合成了不同百分比的Mn含量（Zn0.9mN0.1O（1），Zn0.8mN0.2O（2），Zn0.7mN0.30（3）和Zn0.6mN0.4O（4））通过溶液燃烧方法，用作燃料的尿素。使用拉曼，UV-DRS，SEM，TEM，XPS和粉末XRD技术研究光学，形态和结构性。通过粉末X射线衍射研究证实了Zn1-XMNXO（1,2,3,4）的平均微晶尺寸，其约为30-60nm，而透射电子显微镜研究证实了ZnO Wurtzite晶相的形成。扫描电子显微镜表明样品的球形形态。拉曼光谱研究证实了使用X射线光电子光谱法获得Mn含量增加的氧空位的降低，而使用X射线光电子光谱法获得将Mn离子掺杂到ZnO晶格中。使用UV-DRS光谱法计算样品的带隙能量，而BET表面积测量确认了表面积。通过在可见光光催化下的酚类降解和Cr（VI）减少的研究鉴定Zn1-XMNXO（1,2,3,4）的可见光活性，突出显示Zn0.8mn0.2o（2）显示最佳活动。典型的降解曲线表明污染物的同时降解比除去个体污染物更有效。

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  • 来源
    《RSC Advances》 |2017年第68期|共10页
  • 作者

    Kumar K. V. Ashok; Amanchi Srinivasa Rao; Sreedhar B.; Ghosal P.; Subrahmanyam Ch.;

  • 作者单位

    Indian Inst Technol Hyderabad 502285 Andhra Pradesh India;

    Indian Inst Technol Hyderabad 502285 Andhra Pradesh India;

    Indian Inst Chem Technol Hyderabad 500007 Andhra Pradesh India;

    DRDO Def Met Res Lab Hyderabad 500058 Andhra Pradesh India;

    Indian Inst Technol Hyderabad 502285 Andhra Pradesh India;

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  • 正文语种 eng
  • 中图分类 化学;
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