Nanostructured metallic glass contributing to efficient catalytic degradation of dye wastewater

The effects of annealing temperature on the catalytic degradation capacity of Fe75P15C10 amorphous ribbons in the photo-enhanced Fenton-like reactions are studied using reactive red 195 (RR195) solution. The order of catalytic degradation capacity of the ribbons is AN722 >= AN662 >= AS >= AN542 >= AN602, the AN722 ribbon has the highest k (0.349 min-1), the lowest t eta >= 95% (10 min) values, and compared with AS ribbon has good reus-ability (9 times). Firstly, isothermal annealing is a process of metastable structural relaxation, in which the energy stored in AS ribbon is gradually released, and the high thermodynamic enthalpy and residual stress decrease, which jointly lead to the decline of the catalytic degradation capacity of the ribbons. Secondly, the precipitation of Fe3P nanocrystal/nanophase and amorphous matrix, identified by TEM, induces the formation of galvanic cells effect increase the electron donation rate in the reaction, thus restoring/improving its catalytic degradation capacity.

Automated summary

The effects of annealing temperature on the catalytic degradation capacity of Fe75P15C10 amorphous ribbons in photo-enhanced Fenton-like reactions were studied. The results showed that the degradation capacity varied with different annealing temperatures. It was also observed that the structural relaxation during annealing and the precipitation of Fe3P nanocrystal/nanophase had an impact on the degradation capacity.