Enhancing the acid orange dye degradation efficiency of Mg-based glassy alloys with introducing porous structure and zinc oxide

Document Type

Journal Article

Publication Title

Journal of Alloys and Compounds

Publisher

Elsevier

School

School of Engineering

RAS ID

30984

Comments

Chen, Q., Yan, Z., Guo, L., Zhang, H., Zhang, L., Kim, K., Li, X., & Wang, W. (2020). Enhancing the acid orange dye degradation efficiency of Mg-based glassy alloys with inducing porous structure and zinc oxide. Journal of Alloys and Compounds, 831, Article 154817. https://doi.org/10.1016/j.jallcom.2020.154817

Abstract

Mg-based alloys exhibit a good degradation performance in wastewater treatment containing dyes. The degradation performance of as-spun Mg crystalline ribbon, Mg78Zn22 (MZ) semi-amorphous ribbon and Mg73Zn22Ca5 (MZC) amorphous ribbon on acidic orange dye (AO II) solution is improved apparently by citric acid (CA) solution immersion. The degradation rate constant k of MZ ribbon after immersing for 1 h reaches 0.084 min−1, showing a much higher degradation efficiency than other immersed ribbons. Compared with the immersed Mg and MZC ribbons, the surface of immersed MZ ribbon has a developed loofah porous structure and an appropriate crystallization. Here, the crystallization induced porous structure is composed of Zn and ZnO, which can generate more nascent hydrogen [H] by transporting Mg atoms to surface and more O2•− radical by supplying photo-catalytic ZnO under visible light and then enhance the degradation of AO II dye. This work not only proposes a new method to improve the degradation efficiency of AO II dye by Mg-based alloys, but also provides a new insight into the microstructure and properties of Mg-based alloys.

DOI

10.1016/j.jallcom.2020.154817

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