Rapid decoloration of azo dye Direct Blue 6 by AlCrFeMn high entropy alloy

Wu, Shikai; Pan, Ye; Wang, Ning; Dai, Weiji; Lü, Jie; Lü, Tao

doi:10.1039/c8ra06496b

Cited by 15 publications

(4 citation statements)

References 34 publications

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“…So, we design and synthesize three kinds of cobalt-free HEAs (AlCrFeMn, AlCrFeNi and FeCrNiMn) with equal-atomic ratios by ball milling. Among the three kinds of BM HEAs powders, we find that the bare BM AlCrFeMn powders show the fastest decolorization speed for DB6, 3 times faster than that of bare BM MgZn-based amorphous alloy, which is the best one of the alloy materials reported so far [20][21][22][23]. However, the bare Shikai Wu and Wei Gao have contributed equally to this work.…”

Section: Introductionmentioning

confidence: 90%

“…HEAs powders are easy to lose, easy to agglomerate and not conducive to recycling in the process of decolorization [20,21]. In order to solve these problems, we entrap the bare AlCrFeMn powders in the calcium alginate beads (CABs) for the first time in this work.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…At present, most of the reported HEAs contain cobalt element, which is listed as a kind of strategic material with high price in many countries. In addition, HEAs, usually with single-phase solid solution structure, are consisted of at least four principal metallic elements with equimolar or near-equimolar fractions [19][20][21]. So, we design and synthesize three kinds of cobalt-free HEAs (AlCrFeMn, AlCrFeNi and FeCrNiMn) with equal-atomic ratios by ball milling.…”

Section: Introductionmentioning

confidence: 99%

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Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microfluidics for Decolorization of Azo Dye

Gao

Lü

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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In recent years, high-entropy alloys (HEAs) have received more and more attention due to their unique microstructure and properties. Several researchers have reported that some ball-milled (BM) HEAs powders possess prominent decolorization performance for azo dyes. Three kinds of Co-free HEA powders (AlCrFeMn, AlCrFeNi and FeCrNiMn) have been synthesized by ball milling in this work, of which AlCrFeMn shows the best decolorization efficiency for DB6 aqueous solution. However, at this time, the BM HEAs are in powder state and not easy to be reused, so the loss rate of the powders is high during the reaction. Sometimes, the reaction between reacted the powders and the dye solution is too fast to control. While, in order to solve these problems, this work proposes to immobilize bare BM AlCrFeMn HEA powders in calcium alginate beads (CABs) by electrospray and microfluidics. Through four cycles of reaction, the loss rate of the AlCrFeMn powders can be reduced from 40 to 5 wt% if the powders are immobilized by CABs with an average diameter of 0.55 mm obtained at the DC voltage of 30 kV. In addition, in the four cycles of experiment, the AlCrFeMn HEA-CABs with an average diameter of 0.55 mm shows better stability and easier separation than that of the bare AlCrFeMn powders. These findings provide new ideas for HEAs to decolorize azo dyes and are of great significance for protecting freshwater resources.

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Section: Introductionmentioning

confidence: 90%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microfluidics for Decolorization of Azo Dye

Gao

Lü

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…Various methods had been used to remove azo dye in solution such as physical adsorption, chemical treatment, chemical oxidation and biological treatment [7]. Among these methodologies, Fenton method is reported as an effective technology for the degradation of a large number of hazardous and organic pollutants because of the lack of toxicity of the reagents, which makes it environmentally safe [8].…”

Section: Introductionmentioning

confidence: 99%

Development of High Entropy Alloy (HEA) as Catalyst for Azo Dye Degradation in Fenton Process

Hassan

Natsir

Rahman

et al. 2021

J. Phys.: Conf. Ser.

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Azo dye is widely used in the textile industry since it is cost effective and simple to use. However, it becomes a continuous source of environmental pollution due to its carcinogenicity and toxicity. Various methods had been used to remove the azo dye in solution. One of the famous and repeatedly used is Fenton process. The Fenton’s process is one of the advanced oxidation process where iron catalysed hydrogen peroxide to generate hydroxyl radical. Treating azo dyes in solution requires a catalyst to enhance the process of degradation. Herein, high entropy alloy (HEA) has been proposed as a catalytic material to enhance the performance of Fenton process for azo dye degradation. HEA has been reported as a promising catalyst due to its high surface area. The higher the number of active sites, the higher the rate of azo dye degradation as more active sites are available for adsorption of azo dyes. The results have shown that HEA can be used as a catalyst to fasten the Fenton’s reaction since the degradation time is proven to be shorter in the presence of HEA. The method derived from the result of this study will contribute in treating azo dyes for wastewater management in Fenton process.

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Nanocrystalline High Entropy Alloys and Oxides as Emerging Materials for Functional Applications

Kumari¹,

Gupta²,

Mohapatra³

et al. 2023

Nanomaterials

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Rapid decoloration of azo dye Direct Blue 6 by AlCrFeMn high entropy alloy

Abstract: In recent years, high entropy alloys (HEAs) have attracted a lot of attention from researchers due to their outstanding mechanical properties, but there are few reports about their functional performance.

Cited by 15 publications

References 34 publications

Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microfluidics for Decolorization of Azo Dye

Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microfluidics for Decolorization of Azo Dye

Development of High Entropy Alloy (HEA) as Catalyst for Azo Dye Degradation in Fenton Process

Nanocrystalline High Entropy Alloys and Oxides as Emerging Materials for Functional Applications

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