In-situ growth of magnesium peroxide on the edge of magnesium oxide nanosheets: Ultrahigh photocatalytic efficiency based on synergistic catalysis.,Journal of Colloid and Interface Science

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In-situ growth of magnesium peroxide on the edge of magnesium oxide nanosheets: Ultrahigh photocatalytic efficiency based on synergistic catalysis.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2019-12-02 , DOI: 10.1016/j.jcis.2019.11.122
Wenjing Zeng ₁ , Zhiyuan Yin ₁ , Mingming Gao ₁ , Xue Wang ₁ , Jing Feng ₁ , Yueming Ren ₁ , Tong Wei ₂ , Zhuangjun Fan ₂

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Magnesium oxide (MgO) nanosheets and hydrogen peroxide (H2O2) are respectively employed as a photocatalyst and an oxidant to enhance the photocatalytic efficiency for photo-degradation of methylene blue (MB). During the photocatalytic process, highly-oxidizing magnesium dioxide (MgO2) is generated by reacting with H2O2 on the edge of MgO nanosheets, which is verified by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HR-TEM). The synergistic catalysis of H2O2, MgO2 (highly-oxidizing) and MgO (photocatalysis) has significantly improved the photocatalytic efficiency. The photocatalytic efficiency of MgO nanosheets with H2O2 under visible-light irradiation reaches 98.1%, which is 3.2 times greater than that without H2O2 under visible light (30.5%). Moreover, the photocatalytic efficiency is comparable with that of traditional photocatalysts, such as titanium dioxide (TiO2), graphitic carbon nitride (g-C3N4), etc. This study indicates that the synergistic effect of the homologous oxide catalyst (MgO) effectively improves photo-degradation efficiency via in-situ generating a highly-oxidizing metal peroxide (MgO2) during the photocatalytic process.

中文翻译：

在氧化镁纳米片边缘上过氧化镁的原位生长：基于协同催化的超高光催化效率。

氧化镁（MgO）纳米片和过氧化氢（H2O2）分别用作光催化剂和氧化剂，以提高对亚甲基蓝（MB）光降解的光催化效率。在光催化过程中，通过与MgO纳米片边缘上的H2O2反应生成高氧化性二氧化镁（MgO2），这已通过X射线衍射（XRD），X射线光电子能谱（XPS）和分辨率透射电子显微镜（HR-TEM）。H2O2，MgO2（高氧化性）和MgO（光催化）的协同催化作用显着提高了光催化效率。在可见光照射下，含H2O2的MgO纳米片的光催化效率达到98.1％，是可见光照射下无H2O2的MgO纳米片的光催化效率（30.5％）。而且，

更新日期：2019-12-02

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