WITHDRAWN: Magnetic field-assisted electrodeposition of ZnCo2O4-rGo nanoelectrodes for enhanced supercapacitor performance

Li, Huaxing; Xia, Fafeng; Ma, Chunyang; Li, Chaoyu

doi:10.1016/j.cej.2024.152003

Cited by 1 publication

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“…Within the pH range of 4-10, the adsorption capacity of MNN material for F − gradually rises. This increase is ascribed to the competitive adsorption of H + in slightly acidic conditions, wherein H + preferentially combines with F − to form HF, thereby inhibiting the formation of Ni(OH) 2 [27]. The stronger the acidity, the more prominent the hindrance observed in fluoride adsorption.…”

Section: Impact Of Various Ph Values On Adsorption Characteristicsmentioning

confidence: 99%

Preparation of Fe3O4/NiO Nanomaterials by Electrodeposition and Their Adsorption Performance for Fluoride Ions

Zhang,

Li,

et al. 2024

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The high concentration of fluoride ions in industrial wastewater poses a threat to both human safety and the ecological environment. In this paper, three types of magnetic NiO nanomaterial (MNN) with nickel–iron ratios of 3:1, 2:1, and 1:2 were successfully prepared using the electrodeposition technique to eliminate fluoride ions (F−) from industrial wastewater. The surface morphology, phase composition, and chemical structure of the nanomaterials were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The results demonstrate the MNN material’s exceptional adsorption capabilities for fluoride ions (F−) at a nickel–iron ratio of 3:1, with a maximum adsorption capacity of up to 58.3 mg/g. The adsorption process of fluoride on the MNN material was further examined using Langmuir and pseudo-second-order kinetic models, revealing predominantly monolayer adsorption and chemisorption characteristics. When the amount of FeSO4•9H2O added is minimal, only the distinctive peaks of NiO are visible in the product’s spectrum. However, as the Ni/Fe ratio decreases, characteristic peaks of Fe3O4 crystals begin to appear and gradually intensify, indicating an increase in Fe3O4 content within the MNN material. Additionally, the pH level significantly affects the adsorption of fluoride ions (F−) onto the MNN material, with the highest adsorption capacity observed at pH 7.

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Section: Impact Of Various Ph Values On Adsorption Characteristicsmentioning

confidence: 99%

Preparation of Fe3O4/NiO Nanomaterials by Electrodeposition and Their Adsorption Performance for Fluoride Ions

Zhang,

Li,

et al. 2024

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WITHDRAWN: Magnetic field-assisted electrodeposition of ZnCo2O4-rGo nanoelectrodes for enhanced supercapacitor performance

Cited by 1 publication

References 44 publications

Preparation of Fe3O4/NiO Nanomaterials by Electrodeposition and Their Adsorption Performance for Fluoride Ions

Preparation of Fe3O4/NiO Nanomaterials by Electrodeposition and Their Adsorption Performance for Fluoride Ions

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