Abstract
The Fe41Co7Cr15Mo14C15B6Y2 amorphous alloy powder was prepared by gas atomization. It was interesting that rhodamine B can be completely degraded within only 6 min by 1 g/L Fe41Co7Cr15Mo14C15B6Y2 and 3 mM H2O2 at pH 5.0 at 313 K. This result can be repeated at least 30 times. It is worth mentioning that the catalyst surface spontaneously formed a double passivation film during the degradation process. The passivation film composed of Cr2O3 and Cr(OH)3 is located in the outer layer, while the passivation film composed of MoO2 and MoO3 is located in the inner layer. This double passivation film regulates the contact of ions on the catalyst surface with the solution, which makes the catalyst have a stable catalytic efficiency in the reaction. The findings have important implications in developing Fe-based amorphous alloys for functional application materials in the field of wastewater treatment.
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