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首页> 外文期刊>Electrocatalysis >Efficient and Cost-effective Photoelectrochemical Degradation of Dyes in Wastewater over an Exfoliated Graphite-MoO3 Nanocomposite Electrode
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Efficient and Cost-effective Photoelectrochemical Degradation of Dyes in Wastewater over an Exfoliated Graphite-MoO3 Nanocomposite Electrode

机译：剥落石墨 - MOO3纳米复合电极废水中染料中染料的高效且经济高效的光电化学降解

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Herein, we prepared hexagonal MoO3 (h-MoO3) nanorods by homogenous co-precipitation and utilized them to fabricate a composite h-MoO3-exfoliated graphite (EG) electrode. The above composite was characterized by scanning electron microscopy, Raman spectroscopy, X-ray diffraction, and UV-Vis spectroscopy, and used for the degradation of cationic (methylene blue, MB) and anionic (methyl red, MR) dyes in synthetic wastewater. The efficiency of this degradation was assessed by UV-Vis spectroscopy and electrochemical techniques. Good dispersion of h-MoO3 in EG decreased the electron-hole recombination rate and enhanced the photon absorption efficiency of the EG-MoO3 electrode, which therefore exhibited a higher dye photodegradation efficiency than the bare EG one. Specifically, the efficiencies of 180-min MB photodegradation over EG and EG-MoO3 electrodes were 66.9 and 88.55%, respectively, whereas the corresponding values for MR were 68.0 and 92.22%, respectively, i.e., MR was degraded more effectively than MB. Furthermore, photoelectrochemical oxidation was shown to be more efficient than purely photolytic and electrochemical oxidation, which, together with the ease of preparation, low cost, and high photoactivity/stability of the fabricated nanocomposite electrode makes it potentially suitable for industrial wastewater treatment.
机译：在此，我们通过均匀的共沉淀制备六边形MOO3（H-MOO3）纳米棒，并利用它们制造复合H-MOO3-剥离的石墨（例如）电极。上述复合材料的特征在于扫描电子显微镜，拉曼光谱，X射线衍射和UV-VIS光谱，并用于合成废水中的阳离子（亚甲基蓝，MB）和阴离子（甲基红色，MR）染料的降解。通过UV-Vis光谱和电化学技术评估该降解的效率。 H-MOO3良好的分散在例如降低电子 - 空穴重组率并提高了EG-MOO3电极的光子吸收效率，因此表现出比裸所例如裸露的染料光降解效率更高。具体地，180分钟的MB光降解的效率分别为例如Eg-MOO3电极，分别为66.9和88.55％，而MR的相应值分别为68.0和92.22％，即MR比MB更有效地降解。此外，图示出光电化学氧化比纯度光解和电化学氧化更有效，电化学氧化在一起，它们的易于制备，低成本和制造的纳米复合材料的高光活性/稳定性使其可能适用于工业废水处理。

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