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Ultrafast degradation of azo dyes catalyzed by cobalt-based metallic glass.

ABSTRACT: Reactivity and mass loss are considered mutually exclusive in conventional zero-valent metal (ZVM) technology to treat environmental contaminants. Here, we report the outstanding performance of Co-based metallic glass (MG) in degrading an aqueous solution of azo dye, thus eliminating this trade-off. Ball-milled Co-based MG powders completely degrade Acid Orange II at an ultrafast rate. The surface-area-normalized rate constant of Co-based MG powders was one order of magnitude higher than that of Co-based crystalline counterparts and three orders of magnitude higher than that of the widely studied Fe(0) powders. The coordinatively unsaturated local structure in Co-based MG responds to the catalysis for degradation, resulting in very low mass loss. Wide applicability and good reusability were also present. Co-based MG is the most efficient material for azo dye degradation reported thus far, and will promote the practical application of MGs as functional materials.

SUBMITTER: Qin XD

PROVIDER: S-EPMC4677396 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Ultrafast degradation of azo dyes catalyzed by cobalt-based metallic glass.

Qin X D XD Zhu Z W ZW Liu G G Fu H M HM Zhang H W HW Wang A M AM Li H H Zhang H F HF

Scientific reports 20151214

Reactivity and mass loss are considered mutually exclusive in conventional zero-valent metal (ZVM) technology to treat environmental contaminants. Here, we report the outstanding performance of Co-based metallic glass (MG) in degrading an aqueous solution of azo dye, thus eliminating this trade-off. Ball-milled Co-based MG powders completely degrade Acid Orange II at an ultrafast rate. The surface-area-normalized rate constant of Co-based MG powders was one order of magnitude higher than that of ...[more]

PMID: 26656918

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