Details
| Original language | English |
|---|---|
| Pages (from-to) | 1009-1018 |
| Number of pages | 10 |
| Journal | Journal of cluster science |
| Volume | 34 |
| Issue number | 2 |
| Early online date | 4 Jun 2022 |
| Publication status | Published - Mar 2023 |
| Externally published | Yes |
Abstract
In this study, CuS/Fe3O4 composite structures were prepared in a two-step process. Initially, we used a simple solvothermal method to synthesize CuS nanostructures. Hydrothermal method was employed to form CuS/Fe3O4 composites. We characterized the particles using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The particles exhibit an oxidase-like activity using the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) as oxidase substrate. The presence of chromium (VI) increases the oxidase-like activity and is dependent on the concentration. The UV/visible absorption intensity of the oxidized TMB (oxTMB) increases with the concentration of chromium (VI) which provides a route to colorimetric determination of chromium (VI). We noticed a limit of detection as small as 60 nM and a wide linear dynamic range of 0–1500 µM. We found a high selectivity of this method for chromium (VI) against potentially interference cations and anions. Its applicability for determination of chromium (VI) in real environmental samples is demonstrated using tap water. This result demonstrates the capability of the method in determination of chromium (VI) in real samples.
Keywords
- Chromium, Colorimetric, Composites, Magnetic property, Oxidase-like activity
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of cluster science, Vol. 34, No. 2, 03.2023, p. 1009-1018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Synthesis of a Recoverable CuS/Fe3O4 Composite Structure with Enhanced Oxidase-Like Activity for Detection of Chromium (VI)
AU - Feke, Kuda
AU - Alula, Melisew Tadele
AU - Spende, Hendrik
AU - Waag, Andreas
AU - Lemmens, Peter
N1 - Funding Information: This project was financially supported by Botswana International University of Science and Technology (BIUST) postgraduate research grant (S00327) awarded to KF. This research was also funded by DFG EXC-2123 QuantumFrontiers—390837967, DFG Le967/16-1, and DFG-RTG 1952/1.
PY - 2023/3
Y1 - 2023/3
N2 - In this study, CuS/Fe3O4 composite structures were prepared in a two-step process. Initially, we used a simple solvothermal method to synthesize CuS nanostructures. Hydrothermal method was employed to form CuS/Fe3O4 composites. We characterized the particles using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The particles exhibit an oxidase-like activity using the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) as oxidase substrate. The presence of chromium (VI) increases the oxidase-like activity and is dependent on the concentration. The UV/visible absorption intensity of the oxidized TMB (oxTMB) increases with the concentration of chromium (VI) which provides a route to colorimetric determination of chromium (VI). We noticed a limit of detection as small as 60 nM and a wide linear dynamic range of 0–1500 µM. We found a high selectivity of this method for chromium (VI) against potentially interference cations and anions. Its applicability for determination of chromium (VI) in real environmental samples is demonstrated using tap water. This result demonstrates the capability of the method in determination of chromium (VI) in real samples.
AB - In this study, CuS/Fe3O4 composite structures were prepared in a two-step process. Initially, we used a simple solvothermal method to synthesize CuS nanostructures. Hydrothermal method was employed to form CuS/Fe3O4 composites. We characterized the particles using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The particles exhibit an oxidase-like activity using the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) as oxidase substrate. The presence of chromium (VI) increases the oxidase-like activity and is dependent on the concentration. The UV/visible absorption intensity of the oxidized TMB (oxTMB) increases with the concentration of chromium (VI) which provides a route to colorimetric determination of chromium (VI). We noticed a limit of detection as small as 60 nM and a wide linear dynamic range of 0–1500 µM. We found a high selectivity of this method for chromium (VI) against potentially interference cations and anions. Its applicability for determination of chromium (VI) in real environmental samples is demonstrated using tap water. This result demonstrates the capability of the method in determination of chromium (VI) in real samples.
KW - Chromium
KW - Colorimetric
KW - Composites
KW - Magnetic property
KW - Oxidase-like activity
UR - http://www.scopus.com/inward/record.url?scp=85131587550&partnerID=8YFLogxK
U2 - 10.1007/s10876-022-02284-9
DO - 10.1007/s10876-022-02284-9
M3 - Article
AN - SCOPUS:85131587550
VL - 34
SP - 1009
EP - 1018
JO - Journal of cluster science
JF - Journal of cluster science
SN - 1040-7278
IS - 2
ER -