Catalytic performance of supported nanosized cobalt and iron–cobalt mixed oxides on MgO in oxidative degradation of Acid Orange 7 azo dye with peroxymonosulfate

Stoyanova, M.; Slavova, Iva; Christoskova, St.; Ivanova, Vanina V.

doi:10.1016/j.apcata.2014.02.024

Cited by 105 publications

(29 citation statements)

References 70 publications

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“…It can been seen from Fig. that the addition of ethanol significantly inhibited AO II decolorization, and the AO II removal rate after 40 min reaction time was 42% and 15% when 0.1 mol L −1 and 0.5 mol L −1 EtOH, respectively, was used, thus indicating the radical‐based degradation mechanism in the ‘Fe 3 O 4 @C/MnCo 2 O 4 + PMS’ systems …”

Section: Resultsmentioning

confidence: 90%

Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Liu

Xiong³

et al. 2016

J. Chem. Technol. Biotechnol

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BACKGROUND Synthetic dyes are present in the wastewater from many industrial processes and they cause serious problems to human and aquatic life. The development of a novel and effective peroxymonosulfate (PMS) activator is proposed to eliminate dyes pollution. A new magnetic nanocomposite, Fe3O4@C/MnCo2O4, was prepared and characterized. The activity of Fe3O4@C/MnCo2O4 as heterogeneous catalyst for PMS activation was evaluated by the decolorization of Acid Orange II (AO II). RESULTS With a ‘Fe3O4@C/MnCo2O4 + PMS’ system, the dye solution could be nearly completely decolorized in about 25 min over a wide pH range (pH 4.1−8.1), and 98% removal could be achieved in 15 min without pH adjustment (pH = 6.38). The influence of solution pH, dosage of catalyst and PMS, reaction temperature, and PMS activation mechanism were studied. It was found that sulfate radicals were the primary species responsible for the oxidation of AO II. The catalyst was magnetically separable and displayed good stability and reusability, giving six cycles of use without deterioration in its performance. CONCLUSION This study demonstrated the simple recycling and high activity of Fe3O4@C/MnCo2O4 composite in PMS activation for the decolorization of AO II solution. It provides a promising way for the decontamination of organic pollutants. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 90%

Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Liu

Xiong³

et al. 2016

J. Chem. Technol. Biotechnol

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“…[14][15][16][17] For example, the recovery of the magnetic MFe 2 O 4 materials can be achieved through using an external magnet for the final solution, providing an attractive and cost-effective method for practical operation. Recently, bimetallic oxides (composite oxides of cobalt and another metal element) as excellent heterogeneous Fenton-like catalysts in degradation of organic pollutants have received attention due to their specific nanometer size, large surface area to volume ratio, superparamagnetic behavior, and high catalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of porous NiCo₂O₄ nanoflakes as magnetic recoverable catalysts towards the efficient degradation of RhB

Zhang

et al. 2016

RSC Adv.

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In this work, a class of flake-shaped magnetic NiCo2O4 materials is fabricated by a facile hydrothermal reaction followed by calcination treatment process. The prepared flake-like NiCo2O4 displays porous features that endows a large specific surface area (142.48 m 2 g −1 ) and a narrow pore size distribution (3.70 nm). Furthermore, the NiCo2O4 samples were used as high-performance heterogeneous catalysts in the activation of peroxymonosulphate (PMS) to produce active radicals SO4 −• and HO • . Then, the produced SO4 −• and HO • can further attack and degrade organic dyes. The catalytic results show that magnetic flake-like NiCo2O4 catalyst can completely degrade Rhodamine B (RhB) dye within 30 min with the assistance of PMS. In addition, the catalysts could be magnetic recovered, which displayed high catalytic activity and excellent cycling stability. It was believed that the specific porous features, including high specific surface area and tailoring pore size distributions, and surface defects can ensure the high activation of PMS for the catalytic oxidation of RhB. More importantly, the present synthetic method is facile, controllable and scalable, which highlights its potential in energystorage, environmental treatment, and biology-related fields. nanoparticles (NPs) exhibited high catalytic performance, the MFe 2 O 4 NPs with high surface area and the unique magnetic properties always lead to their aggregation, resulting in lower catalytic efficiency. 24 To solve these issues, some carbonaceous materials with high electrical conductivity have been widely Graphitic abstract: A kind of porous flake-like NiCo 2 O 4 was prepared via simple hydrothermal reaction followed by a calcination treatment process. The prepared NiCo 2 O 4 as catalyst to activation of PMS for furthermore degradation of RhB. Results demonstrated that the NiCo 2 O 4 /PMS heterogeneous catalysts display high catalytic activity and excellent cycling durability (see Figure), which is superior to most previously reported results.

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“…Stoyanova et al prepared nanosized cobalt and iron -cobalt spinel oxides -bulk and supported on MgO -and tested as catalysts for oxidative degradation of a textile monoazo-dye, (Acid Orange 7(AO7)), in aqueous solution using peroxymonosulfate as oxidant [64]. Nearly 100% AO7 removal was achieved within a short treatment time and with negligible Co and Fe leaching from the catalyst's particles during the degradation process.…”

Section: Applications In Azo and Antraquinonic Dyes Removalmentioning

confidence: 97%

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

Horst

Lassalle

Ferreira

2015

Front. Environ. Sci. Eng.

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Nanosized magnetite has emerged as an adsorbent of pollutants in water remediation. Nanoadsorbents include magnetic iron oxide and its modifiers/ stabilizers, such as carbon, silica, clay, organic moieties (polymers, aminoacids, and fatty acids) and other inorganic oxides. This review is focused on the recent developments on the synthesis and use of magnetic nanoparticles and nanocomposites in the treatment of contaminated water. The emphasis is on the influence of the iron oxide modifiers on some properties of interest such as size, BET area, and magnetization. The characteristics of these nanomaterials are related to their ability to eliminate heavy metal ions and dyes from wastewater. Comparative analysis of the actual literature was performed aiming to present the magnetic material, its preparation methodology and performance in the elimination of the selected pollutants. Vast information has been properly summarized according to the materials, their properties and preferential affinity for selected contaminants. The mechanisms governing nanomaterial's formation as well as the interactions with heavy metals and dyes have been carefully analyzed and associated to their efficiency.

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Catalytic performance of supported nanosized cobalt and iron–cobalt mixed oxides on MgO in oxidative degradation of Acid Orange 7 azo dye with peroxymonosulfate

Cited by 105 publications

References 70 publications

Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Facile synthesis of porous NiCo₂O₄ nanoflakes as magnetic recoverable catalysts towards the efficient degradation of RhB

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

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Catalytic performance of supported nanosized cobalt and iron–cobalt mixed oxides on MgO in oxidative degradation of Acid Orange 7 azo dye with peroxymonosulfate

Cited by 105 publications

References 70 publications

Activation of peroxymonosulfate with magnetic and recyclable Fe3 O4 @C/MnCo2 O4 nanocomposites for the decolorization of Acid Orange II

Activation of peroxymonosulfate with magnetic and recyclable Fe3 O4 @C/MnCo2 O4 nanocomposites for the decolorization of Acid Orange II

Facile synthesis of porous NiCo2O4 nanoflakes as magnetic recoverable catalysts towards the efficient degradation of RhB

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

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Product

Resources

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Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Activation of peroxymonosulfate with magnetic and recyclable Fe₃ O₄ @C/MnCo₂ O₄ nanocomposites for the decolorization of Acid Orange II

Facile synthesis of porous NiCo₂O₄ nanoflakes as magnetic recoverable catalysts towards the efficient degradation of RhB