Utilization of metallurgical waste for the preparation of photocatalytically active composites based on ZnO–graphene oxide

Škuta, Radim; Kostura, Bruno; Langová, Šárka; Ritz, Michal; Foniok, Kryštof; Študentová, Soňa; Pavlovský, Jiří; Novák, Vlastimil; Matýsek, Dalibor

doi:10.1007/s11696-021-01628-5

Chem. Pap.

2021

DOI: 10.1007/s11696-021-01628-5

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Utilization of metallurgical waste for the preparation of photocatalytically active composites based on ZnO–graphene oxide

Radim Škuta

Bruno Kostura

Šárka Langová

et al.

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Cited by 4 publications

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“…It extends them by investigating the behaviour of a carbon paste electrode modified with sludge leached in acetic acid to assess the stability and reversibility of this system. Acetic acid was chosen to separate zincite because zinc acetate can be used to prepare nanocomposites with photocatalytic effects, as demonstrated in 39 . The influence of the liquid/solid ratio, time, and acid concentration on the selectivity of zinc leaching has already been investigated elsewhere 40 .…”

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Electrochemical characterization of leached steel-making sludge

Langová

Kostura

Raška

et al. 2022

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In this work, the electrochemical properties of the leached sludge, magnetite and zinc ferrite were studied. Acetic acid was used as a leaching reagent because, in recent years, there has been a surge of interest in using zinc-containing materials as photocatalysts, with acetic acid finding application in their preparation. Various methodological approaches were used, but the best results were achieved with a combination of 1–3 h leaching in 0.01 M acetic acid with a solid/liquid ratio of 500. In this arrangement, zincite was almost completely removed from the sludge, while zinc ferrite and magnetite remained in the solid residue. Ex situ analyses of the main leaching products were performed by X-ray diffraction, infrared spectroscopy, and thermogravimetry. The electrochemical behaviour of solid residue and model systems, that are micromagnetite and zinc ferrite, was studied in alkaline media by means of modified carbon paste electrodes, cyclic voltammetry, and chronocoulometry, with a suitable potential window ranging from 0 to 1.5 V. In summary, a linear dependence of the anodic and cathodic peak height on the square root of the scan rate was found. The position of the anodic and cathodic peaks shifted slightly with scan rate, only at low rates, up to 25 mV/s, the individual peaks coincided. The electrochemical response suggested a quasireversible process.

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Electrochemical characterization of leached steel-making sludge

Langová

Kostura

Raška

et al. 2022

Sci Rep

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Poly(p-phenylenediamine)/X (X = zinc oxide, cerium oxide, manganese oxide) composites: synthesis, characterization, and electrochemical properties

Huner

2023

Iran Polym J

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Comparing the photocatalytic performance of GO/ZnO and g-C3N4/ZnO composites prepared using metallurgical waste as a source of zinc

Škuta

Kostura

Ritz

et al. 2023

Inorganic Chemistry Communications

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Utilization of metallurgical waste for the preparation of photocatalytically active composites based on ZnO–graphene oxide

Cited by 4 publications

References 45 publications

Electrochemical characterization of leached steel-making sludge

Electrochemical characterization of leached steel-making sludge

Poly(p-phenylenediamine)/X (X = zinc oxide, cerium oxide, manganese oxide) composites: synthesis, characterization, and electrochemical properties

Comparing the photocatalytic performance of GO/ZnO and g-C3N4/ZnO composites prepared using metallurgical waste as a source of zinc

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