Study On The Degradation Performance Of Fe-Si-B Amorphous Alloy For Orange ? Azo Dyes

According to statistics,the proportion of azo dyes used in the printing and dyeing industry is as high as 70%.However,the discharge of azo dye wastewater without proper treatment will seriously damage the ecological environment.In recent years,the degradation of azo dye wastewater by Fe-based amorphous alloys has the advantages of good degradation performance,low cost,simple operation,and less secondary pollution,which has attracted much attention.However,the degradation mechanism of amorphous alloys is still unclear,the effect of adding metal-like elements is unknown,and how to improve the degradation efficiency and other issues have restricted its industrial application.Therefore,it is of great significance to carry out related work on the above issues.In this paper,the performance difference between amorphous and crystalline alloys of the same composition in the degradation of gold orange?azo dyes is systematically studied,and the mechanism is analyzed.The effect of the degree of crystallization and the doping of small-sized metal-like elements on the degradation performance was further explored.This article draws the following conclusions:(1)By investigating the difference in degradation of Fe₈₃Si₃B₁₄crystalline and amorphous alloy ribbons,it is found that amorphous ribbon have higher reactivity,and the degradation efficiency is 66.82%higher than that of crystalline ribbons.Besides,in comparing the effects of temperature on degradation performance,it was found that when the same temperature is increased,the degradation efficiency of amorphous alloys is improved by as much as that of crystalline alloys.(2)When investigating the effect of small-size element doping on the degradation performance of Fe₈₃Si₃B₁₄,it is found that phosphorus doping is beneficial to the exposure of local Fe,increasing the degradation efficiency of 8.7%.The Fe_83-xSi_2.5B₁₂P_2.5C_x(x=0.5,1,1.5,2)was further doped with a small amount of C,and the study found that it can broaden the material's primary and secondary crystallization temperature difference?T,and improve the material's amorphous forming ability.When the carbon doping amount is at an atomic ratio,the?T of the material is the largest and the degradation efficiency is increased by 10.41%compared with the single doping of P.(3)The Fe₈₂Si_2.5B₁₂P_2.5C₁component with the largest difference(?T)between the primary and secondary crystallization temperatures is selected to investigate the effect of the degree of crystallization on the degradation performance.The experimental results found that the elimination of stress and crystallization will reduce the degradation efficiency of the ribbon.This is because the amorphous alloy is a metastable material with high reactivity.When the amorphous alloy eliminates internal stress and undergoes crystallization behavior,the material will tend to develop in a stable state,thereby reducing the degradability of the ribbon.By analyzing the degradation ability of crystalline and amorphous Fe-Si-B alloys with the same composition,the reason for the excellent degradation performance of amorphous alloys is obtained.Doping with small-size elements to improve the degradation efficiency of materials.The research content and results of this thesis are of great guiding significance for understanding the degradation process of amorphous alloys and for composition optimization.It can further promote the application of amorphous alloys in dye wastewater treatment.