In-situ growth of magnesium peroxide on the edge of magnesium oxide nanosheets: Ultrahigh photocatalytic efficiency based on synergistic catalysis.

Author(s) Zeng, W.; Yin, Z.; Gao, M.; Wang, X.; Feng, J.; Ren, Y.; Wei, T.; Fan, Z.
Journal J Colloid Interface Sci
Date Published 2020 Mar 01
Abstract

Magnesium oxide (MgO) nanosheets and hydrogen peroxide (HO) 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 (MgO) is generated by reacting with HO 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 HO, MgO (highly-oxidizing) and MgO (photocatalysis) has significantly improved the photocatalytic efficiency. The photocatalytic efficiency of MgO nanosheets with HO under visible-light irradiation reaches 98.1%, which is 3.2 times greater than that without HO under visible light (30.5%). Moreover, the photocatalytic efficiency is comparable with that of traditional photocatalysts, such as titanium dioxide (TiO), graphitic carbon nitride (g-CN), 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 (MgO) during the photocatalytic process.

DOI 10.1016/j.jcis.2019.11.122
ISSN 1095-7103
Citation Zeng W, Yin Z, Gao M, Wang X, Feng J, Ren Y, et al. In-situ growth of magnesium peroxide on the edge of magnesium oxide nanosheets: Ultrahigh photocatalytic efficiency based on synergistic catalysis. J Colloid Interface Sci. 2020;561:257-264.

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