Synergistic catalytic effect of iron metallic glass particles in direct blue dye degradation

Das, Santanu; Bandi, Venugopal; Arora, Harpreet Singh; Veligatla, Medha; Garrison, Seth; D’Souza, Francis; Mukherjee, Sundeep

doi:10.1557/jmr.2015.90

Cited by 19 publications

(12 citation statements)

References 27 publications

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“…However, ZVI is easily oxidized (rust) and its degradation efficiency decays rapidly. Recently, Fe-based amorphous powders and metallic glass composites have been developed that demonstrate higher efficiency in the degradation of azo dyes and other organic contaminants compared to conventional iron powders 10 11 12 . Metallic glasses have attracted considerable attention over the past three decades due to their unique physical, mechanical and chemical properties 13 14 .…”

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confidence: 99%

A highly efficient degradation mechanism of methyl orange using Fe-based metallic glass powders

Xie

Huang

Kruzic

et al. 2016

Sci Rep

143

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A new Fe-based metallic glass with composition Fe76B12Si9Y3 (at. %) is found to have extraordinary degradation efficiency towards methyl orange (MO, C14H14N3SO3) in strong acidic and near neutral environments compared to crystalline zero-valent iron (ZVI) powders and other Fe-based metallic glasses. The influence of temperature (294–328 K) on the degradation reaction rate was measured using ball-milled metallic glass powders revealing a low thermal activation energy barrier of 22.6 kJ/mol. The excellent properties are mainly attributed to the heterogeneous structure consisting of local Fe-rich and Fe-poor atomic clusters, rather than the large specific surface and strong residual stress in the powders. The metallic glass powders can sustain almost unchanged degradation efficiency after 13 cycles at room temperature, while a drop in degradation efficiency with further cycles is attributed to visible surface oxidation. Triple quadrupole mass spectrometry analysis conducted during the reaction was used to elucidate the underlying degradation mechanism. The present findings may provide a new, highly efficient and low cost commercial method for azo dye wastewater treatment.

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confidence: 99%

A highly efficient degradation mechanism of methyl orange using Fe-based metallic glass powders

Xie

Huang

Kruzic

et al. 2016

Sci Rep

143

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“…Degradation of azo dyes by ZVMs is a surface-mediated process 43 . Ball milling can increase the surface area of powders, thus accelerating the degradation process 34 35 39 . Prior to ball milling, the MG ribbons were annealed at approximately the onset glass transition temperature ( T g ).…”

Section: Resultsmentioning

confidence: 99%

“…These findings develop a tremendous application potential of MGs in remediation of wastewater contaminated with azo dyes. More MGs, e.g., Fe-, Mg-, MgZn- and Al-based ones, were subsequently applied to azo dye degradation 33 34 35 36 37 38 39 40 41 . The reacting rate was effectively enhanced, and the problem of mass loss was alleviated to a certain extent.…”

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confidence: 99%

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

Qin

Zhu

Liu

et al. 2015

Sci Rep

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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 Fe0 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.

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“…In aqueous medium, zero‐valent transition metal ions (ZVTMI) (e.g., Fe) produce toxic reaction by‐products such as rust (Fe 2 O 3 · n H 2 O) . Recently, Fe‐ and Mg‐based metallic glasses (MG) have been found to be very effective in degradation of organic chemicals including AZO dye . MG are amorphous multi‐component alloys that have attracted lot of interest due to their high catalytic activity, chemical inertness, and durability .…”

Section: Introductionmentioning

confidence: 99%

Bi‐Functional Mechanism in Degradation of Toxic Water Pollutants by Catalytic Amorphous Metals

2015

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The authors report on the high catalytic activity and bi-functional catalysis mechanism of amorphous metals in degrading AZO Dye, a toxic water pollutant and carcinogen. Aluminum-based metallic glass was found to completely degrade AZO dye at room temperature without any toxic by-products. The high catalytic activity originates from the simultaneous ionization of the transition metals, which act as electron donors for rapid degradation of AZO dye in an aqueous medium. The dye degradation rate and catalytic activity were characterized via UV-VIS absorption spectroscopy. The rate of dye degradation was significantly faster compared to state-of-the-art zero valent iron. The dye degradation mechanism was studied using Raman and IR spectroscopy combined with X-ray photoelectron spectroscopy.

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Synergistic catalytic effect of iron metallic glass particles in direct blue dye degradation

Abstract: Abstract

Cited by 19 publications

References 27 publications

A highly efficient degradation mechanism of methyl orange using Fe-based metallic glass powders

A highly efficient degradation mechanism of methyl orange using Fe-based metallic glass powders

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

Bi‐Functional Mechanism in Degradation of Toxic Water Pollutants by Catalytic Amorphous Metals

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