A facile hydrothermal recovery of nano sealed MnO<sub>2</sub>particle from waste batteries: An advanced material for electrochemical and environmental applications

Mylarappa, M.; Lakshmi, V. Venkata; Mahesh, K.R. Vishnu; Nagaswarupa, H.P.; Raghavendra, N.

doi:10.1088/1757-899x/149/1/012178

Cited by 68 publications

(28 citation statements)

References 17 publications

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“…The main absorption bands were detected around 1368, 1635, 2940, and 3433 cm −1 as shown in Figure d. The band at 1368 cm −1 is assigned to the –OH bending vibrations attached to Mn atoms . The presence of troves at 1368 and 1635 cm −1 provides evidence that the materials are layered hydrated MnO 2 .…”

Section: Resultsmentioning

confidence: 96%

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Ghasemian

Mayyas

Idrus-Saidi

et al. 2019

Adv Funct Materials

137

151

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Liquid metals offer unprecedented chemistry. Here it is shown that they can facilitate self-limiting oxidation processes on their surfaces, which enables the growth of metal oxides that are atomically thin. This claim is exemplified by creating atomically thin hydrated MnO 2 using a Galvanic replacement reaction between permanganate ions and a liquid gallium-indium alloy (EGaIn). The "liquid solution"-"liquid metal" process leads to the reduction of the permanganate ions, resulting in the formation of the oxide monolayer at the interface. It is presented that under mechanical agitation liquid metal droplets are established, and simultaneously, hydrated gallium oxides and manganese oxide sheets delaminate themselves from the interfacial boundaries. The produced nanosheets encapsulate a metallic core, which is found to consist of solid indium only, with the full migration of gallium out of the droplets. This process produces core/shell structures, where the shells are made of stacked atomically thin nanosheets. The obtained core/shell structures are found to be an efficient photocatalyst for the degradation of an organic dye under simulated solar irradiation. This study presents a new research direction toward the modification and functionalization of liquid metals through spontaneous interfacial redox reactions, which has implications for many applications beyond photocatalysis.

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Section: Resultsmentioning

confidence: 96%

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Ghasemian

Mayyas

Idrus-Saidi

et al. 2019

Adv Funct Materials

137

151

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“…The FTIR spectra of the MnO 2 nanoparticles display a broad band around 3404 cm −1 corresponding to the -OH vibration mode of absorbed water [ 43 ]. The vibration bands at 1629 and 1398 cm −1 can be ascribed to the -OH stretching of the adsorbed water and the metallic hydroxide (Mn-OH) formed during the electrodeposition process, respectively [ 42 , 43 , 44 ]. The broad band around 647 cm −1 was attributed to the stretching Mn-O bond in MnO 2 nanoparticles [ 39 , 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…The vibration bands at 1629 and 1398 cm −1 can be ascribed to the -OH stretching of the adsorbed water and the metallic hydroxide (Mn-OH) formed during the electrodeposition process, respectively [ 42 , 43 , 44 ]. The broad band around 647 cm −1 was attributed to the stretching Mn-O bond in MnO 2 nanoparticles [ 39 , 43 , 44 ]. The RGO nanosheets display the broad -OH band around 3140 cm −1 with a negligible shift in position when compared to the -OH of the MnO 2 @RGO nanocomposite [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

2021

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The rapid detection of trace metals is one of the most important aspect in achieving environmental monitoring and protection. Electrochemical sensors remain a key solution for rapid detection of heavy metals in environmental water matrices. This paper reports the fabrication of an electrochemical sensor obtained by the simultaneous electrodeposition of MnO2 nanoparticles and RGO nanosheets on the surface of a glassy carbon electrode. The successful electrodeposition was confirmed by the enhanced current response on the cyclic voltammograms. The XRD, HR-SEM/EDX, TEM, FTIR, and BET characterization confirmed the successful synthesis of MnO2 nanoparticles, RGO nanosheets, and MnO2@RGO nanocomposite. The electrochemical studies results revealed that MnO2@RGO@GCE nanocomposite considerably improved the current response on the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. These remarkable improvements were due to the interaction between MnO2 nanomaterials and RGO nanosheets. Moreover, the modified sensor electrode portrayed high sensitivity, reproducibility, and stability on the simultaneous determination of Zn(II), Cd(II), and Cu(II) ions. The detection limits of (S/N = 3) ranged from 0.002–0.015 μg L−1 for the simultaneous detection of Zn(II), Cd(II), and Cu(II) ions. The results show that MnO2@RGO nanocomposite can be successfully used for the early detection of heavy metals with higher sensitivity in water sample analysis.

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“…Due to the influence of electrolyte, smaller the oxidationreduction value (EO − ER) greater will be the electrode activity, and greater is the diffusion coefficient (D) and greater will be the electrochemical performance [33,34].…”

Section: H Nmr Spectramentioning

confidence: 99%

Studies on DNA Interactions and Biological Activities of Lanthanum(III) Complexes with 4-Quinoline Terpyridine and 1,10-Phenanthroline

et al. 2019

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A series of lanthanum(III) complexes [La(4-qtpy)2(NO3)2](NO3) (1), [La(4-qtpy)3(NO3)](NO3)2 (2), [La(4-qtpy)(phen)(NO3)2](NO3) (3) and [La(4-qtpy)(phen)2(NO3)2](NO3) (4) (4-qtpy = 4′-[(4-quinoline)-2,2′;6′,2′′-terpyridine]) were synthesized and characterized. The cyclic voltammetric studies revealed that the complexes 1 and 3 are redox active. UV-visible absorption spectral studies and viscosity measurements revealed that complexes bind to DNA through intercalation. Complexes 1 and 3 have shown the highest binding propensity (Kb = 4.241 + 0.2 × 106 for 1 and 1.492 + 0.2 × 106 for 3). The results of chemical nuclease studies revealed that the complexes 3 and 4 have shown maximum chemical nuclease activity in the presence of H2O2 and the mechanism involves hydroxyl radicals. The antibacterial activities of the complexes 1 to 4 were tested against Gram positive and Gram negative bacteria in which complex 3 shows comparable results with the standard antibiotic tetracycline. The cytotoxic activities of 4-qtpy and complex 4 were done by MTT assay against HeLa cell lines.

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A facile hydrothermal recovery of nano sealed MnO₂particle from waste batteries: An advanced material for electrochemical and environmental applications

Cited by 68 publications

References 17 publications

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

Studies on DNA Interactions and Biological Activities of Lanthanum(III) Complexes with 4-Quinoline Terpyridine and 1,10-Phenanthroline

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A facile hydrothermal recovery of nano sealed MnO2particle from waste batteries: An advanced material for electrochemical and environmental applications

Cited by 68 publications

References 17 publications

Self‐Limiting Galvanic Growth of MnO2 Monolayers on a Liquid Metal—Applied to Photocatalysis

Self‐Limiting Galvanic Growth of MnO2 Monolayers on a Liquid Metal—Applied to Photocatalysis

MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

Studies on DNA Interactions and Biological Activities of Lanthanum(III) Complexes with 4-Quinoline Terpyridine and 1,10-Phenanthroline

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A facile hydrothermal recovery of nano sealed MnO₂particle from waste batteries: An advanced material for electrochemical and environmental applications

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis