A facile synthesis of metal ferrites and their catalytic removal of toxic nitro-organic pollutants

Ramu, A.G.; Salla, Sunitha; Chandrasekaran, S.; Silambarasan, P.; Gopi, Sivalingam; Seo, Seung-Yoon; Yun, Kyusik; Choi, Dai Hyuk

doi:10.1016/j.envpol.2020.116063

Cited by 44 publications

(17 citation statements)

References 32 publications

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“…We have chosen this reaction because according to U.S. Environmental Production Agency, nitroaromatic compounds are highly toxic and act as major water pollutants. Traces of nitroaromatic compounds are commonly present in the wastewater discharged from the industries producing pesticides, herbicides, paint, wood preservatives, dyes and pigments, etc., , and are causing harm to both humans as well as other living species . Moreover, most of the nitroanilines and nitrophenols are neurotoxic and can damage the cardiovascular system. , Several researchers have developed different strategies to remove nitroaromatic compounds from the wastewater such as catalytic moist air oxidation, catalytic reduction, photocatalytic degradation, electrolytic reduction, etc. , Catalytic reduction of organic nitro compounds to their corresponding amino products is a very exciting methodology because the resulting products, i.e., the aromatic amino compounds, are industrially important intermediates in the manufacture of lubricants, corrosion inhibitors, analgesic drugs, polymers, etc. − For this purpose, the reduction of nitroaromatic compounds in the presence of NaBH 4 in an aqueous medium is one of the widely used methods due to its simplicity, high efficiency, cost-effectiveness, and eco-friendliness. ,− …”

Section: Introductionmentioning

confidence: 99%

Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

et al. 2021

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Energy storage and environmental pollution are two major global concerns in today's scenario. As a result of the momentous exhaustion of fossil fuels, the generation of energy from renewable sources is gaining immense importance. However, the irregular availability of energy from these renewable sources is the major encounter to achieve sustainable energy harvesting technology, yielding efficient but continuous and reliable energy supplies. Apart from the requirement of state-of-the-art heavy-duty technologies such as transportation, defense, etc., in the modern lifestyle to fulfill the demand for flexible electronic devices, the development of high-performance mechanically flexible all-solid-state supercapacitors is increasing massively. On the other hand, to cater to the need for accessibility of clean water for healthy lives, several technologies are evolving to treat wastewater and groundwater. Hence, the development of efficient catalysts for destroying water pollutants is an attractive approach. Considering these two crucial facets, in this paper, we have demonstrated the multifunctional features of a CuFe 2 O 4 -rGO nanocomposite, which was exploited to fabricate a high-performance mechanically flexible all-solid-state asymmetric supercapacitor and simultaneously used as an efficient but easily recoverable catalyst for the transformation of different nitroaromatic compounds. We have also demonstrated the conversion of trifluralin (a herbicide), which is present in the water body as a pollutant, to its corresponding amine derivatives, which can be utilized in the preparation of important pharmaceutical products.

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Section: Introductionmentioning

confidence: 99%

Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

et al. 2021

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“…For example, Dey et al reported the fabrication of nickel ferrite through a chemical route aided by surfactants for catalytic reduction of nitroaromatic compounds. [16] Ramu et al investigated the catalytic removal of nitro compounds using magnetic metal ferrites, [17] Jose et al developed a Co 3 O 4 / CoFe 2 O 4 composite for the sol-gel reduction of nitrophenol. [18] Tripathi et al reported reduction of 4-nitrophenol to 4-aminophenol using MgFe 2 O 4 in just 9 minutes.…”

Section: Introductionmentioning

confidence: 99%

“…Ramu et al . investigated the catalytic removal of nitro compounds using magnetic metal ferrites, [17] Jose et al . developed a Co 3 O 4 /CoFe 2 O 4 composite for the sol‐gel reduction of nitrophenol [18] .…”

Section: Introductionmentioning

confidence: 99%

Magnetically Separable Zn_1‐xCu_0.5xMg_0.5xFe₂O₄ Ferrite: A Stable Catalyst for Reduction of 4‐Nitrophenol

et al. 2022

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Spinel ferrites have recently received significant attention due to their high potential for environmental remediation. We herein report highly stable Cu−Mg substituted zinc ferrites, which were achieved for the first time using a sonochemical method. The phase purity and chemical composition of as‐synthesized ferrites were confirmed by using X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). The size, shape, magnetic properties, and morphology of ferrites were characterized by using Transmission electron microscopes (TEM), Energy Dispersive X‐Ray Analysis (EDX), and Vibrating Sample Magnetometer (VSM). The catalytic performance of the synthesized ferrite was observed in the reduction of aqueous 4‐nitrophenol to 4‐aminophenol with NaBH4. The maximal reduction attained by the Zn1‐xCu0.5xMg0.5xFe2O4 nanoferrite (1.5 min) was significantly impactful than that of other ferrites. The rate constant for the reduction of 4‐nitrophenol was determined to be 0.502 min−1, which was higher than previously reported literature values, and the reduction followed pseudo first‐order kinetics. The cation distribution, crystallinity, and morphology of Zn1‐xCu0.5xMg0.5xFe2O4 were found to be responsible for its higher catalytic activity. Further, this research has the potential to be useful in environmental remediation and offers new findings on mixed ferrite.

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“…Human exposure to these toxic nitrophenols adversely affects kidney and liver function and causes cancer to the living organism 9 . Even though the short-term exposure also causes severe health diseases to human beings such as nausea, cyanosis, and drowsiness 10 . Thus the U.S EPA listed the nitrophenols are top-rated toxic pollutants to the human and living organism 11 .…”

Section: Introductionmentioning

confidence: 99%

Highly efficient and simultaneous catalytic reduction of multiple toxic dyes and nitrophenols waste water using highly active bimetallic PdO–NiO nanocomposite

Ramu

Choi

2021

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Azo dyes and nitrophenols have been widely used in the various industry which are highly toxic and affecting the photosynthetic cycle of aquatic organism. The industry disposals increase the accumulation of azo compounds in the environment. In the present study, we synthesized the low cost, PdO-doped NiO hetero-mixture via simple hydrothermal combined calcination process. The morphology results proved that, the spherical PdO nanoparticles are evenly doped with NiO nanoparticles. The band gap values of metal oxides NiO, PdO and PdO–NiO composite were found to be 4.05 eV, 3.84 eV and 4.24 eV, respectively. The high optical bandgap (Eg) value for composite suggests that the PdO interface and NiO interface are closely combined in the composite. The catalytic activity of the PdO–NiO was analyzed for the reduction of different toxic azo compounds namely, 4-nitrophenol (NP), 2,4-dinitrophenol (DNP), 2,4,6-trinitrophenol (TNP), methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) separately and their mixture with the presence of a NaBH4. For the first time, the large volume of the toxic azo compounds was reduced into non-toxic compounds with high reduction rate. The proposed PdO–NiO catalyst exhibit excellent rate constant 0.1667, 0.0997, 0.0686 min−1 for NP, DNP and TNT and 0.099, 0.0416 and 0.0896 min−1 for MB, RhB and MO dyes respectively which is higher rate constant than the previously reported catalysts. Mainly, PdO–NiO completes the reduction of mixture of azo compounds within 8 min. Further, PdO–NiO exhibit stable reduction rate of azo compounds over five cycles with no significant loss. Hence, the proposed low cost and high efficient PdO–NiO catalyst could be the promising catalyst for degradation of azo compounds.

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A facile synthesis of metal ferrites and their catalytic removal of toxic nitro-organic pollutants

Cited by 44 publications

References 32 publications

Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Magnetically Separable Zn_1‐xCu_0.5xMg_0.5xFe₂O₄ Ferrite: A Stable Catalyst for Reduction of 4‐Nitrophenol

Highly efficient and simultaneous catalytic reduction of multiple toxic dyes and nitrophenols waste water using highly active bimetallic PdO–NiO nanocomposite

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A facile synthesis of metal ferrites and their catalytic removal of toxic nitro-organic pollutants

Cited by 44 publications

References 32 publications

Dual-Purpose CuFe2O4-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Dual-Purpose CuFe2O4-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Magnetically Separable Zn1‐xCu0.5xMg0.5xFe2O4 Ferrite: A Stable Catalyst for Reduction of 4‐Nitrophenol

Highly efficient and simultaneous catalytic reduction of multiple toxic dyes and nitrophenols waste water using highly active bimetallic PdO–NiO nanocomposite

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Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Dual-Purpose CuFe₂O₄-rGO-Based Nanocomposite for Asymmetric Flexible Supercapacitors and Catalytic Reduction of Nitroaromatic Derivatives

Magnetically Separable Zn_1‐xCu_0.5xMg_0.5xFe₂O₄ Ferrite: A Stable Catalyst for Reduction of 4‐Nitrophenol