Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Metals

Peng Chen¹  Xin Wang¹  Shuiqing Liu¹  Chunxiang Cui¹  Ximei Hu¹  Yumin Qi¹  Lichen Zhao¹  Zongjia Li¹ 

[1] Key Laboratory for New Type of Functional Materials in Hebei Province, School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;

关键词: metallic glass;    Mg-Zn-Ca;    corrosion;    azo dyes degradation;   

DOI  :  10.3390/met7110485

来源: DOAJ

【 摘 要 】

Mg-Zn-Ca metallic glass (MG) is effective for degrading azo dyes; however, the related surface evolution and degradation mechanisms are little known. We comparatively investigated the initial surface corrosion morphologies of melt-spun Mg66Zn30Ca4 MG in deionized water and artificial seawater. It was found that the basic corrosion behavior of the MG was the same, except that the corrosion process was accelerated in seawater. The presence of NaCl obviously promotes the formation of nano-ZnO on the surface of ribbons, causing the rapid degradation of azo dyes due to the photocatalytic effect. The degradation efficiency when combined with 3.5 wt % NaCl was over 100 times higher than that without NaCl. This indicates that Mg-Zn-Ca MG ribbons are effective additives for the degradation of azo dyes in seawater.

【 授权许可】

Unknown