Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater
Open Access
Abstract
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.Keywords
Funding Information
- Natural Science Foundation of Hebei Province in China (E2016202332, E2016202406)
- Hebei Provincial Department of Human Resources and Social Security of China (B2015003012)
- Hebei Education Department of China (QN2014032)
This publication has 28 references indexed in Scilit:
- Unexpected high performance of Fe-based nanocrystallized ribbons for azo dye decompositionJournal of Materials Chemistry A, 2017
- Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB6/Al Composite Inoculant in AluminumMetals, 2017
- Homogeneous flow and size dependent mechanical behavior in highly ductile Zr65Ni35 metallic glass filmsActa Materialia, 2017
- Enhanced grain refinement of in situ CeB6/Al composite inoculant on pure aluminum by microstructure controlJournal of Alloys and Compounds, 2017
- A facile and efficient single step ball milling process for synthesis of partially amorphous Mg-Zn-Ca alloy powders for dye degradationJournal of Alloys and Compounds, 2017
- Insight into the high reactivity of commercial Fe–Si–B amorphous zero-valent iron in degrading azo dye solutionsRSC Advances, 2015
- Rapid decomposition of Direct Blue 6 in neutral solution by Fe–B amorphous alloysRSC Advances, 2014
- Compositional-induced structural change in ZrxNi100−x thin film metallic glassesJournal of Alloys and Compounds, 2014
- Synthesis of Mg–Zn–Ca metallic glasses by gas-atomization and their excellent capability in degrading azo dyesMaterials Science and Engineering: B, 2014
- Excellent capability in degrading azo dyes by MgZn-based metallic glass powdersScientific Reports, 2012