Magnetic Nitrogen and Sulfur Doped Reduced Graphene Oxide for Congo Red Removal; Mechanism for the Synthesis of Adsorbent

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F25%3A00013742" target="_blank" >RIV/46747885:24620/25:00013742 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/slct.202503336" target="_blank" >https://doi.org/10.1002/slct.202503336</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/slct.202503336" target="_blank" >10.1002/slct.202503336</a>

Result language

angličtina

Original language name

Magnetic Nitrogen and Sulfur Doped Reduced Graphene Oxide for Congo Red Removal; Mechanism for the Synthesis of Adsorbent

Original language description

Nitrogen- and sulfur-doped reduced graphene oxide (NSrGO) was synthesized using a hydrothermal technique with thiourea and graphene oxide as precursors, and then magnetized via the co-precipitation method. The synthesized magnetic NSrGO was then characterized using field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared spectrophotometry (FT-IR), X-ray diffraction (XRD) analysis, and transmission electron microscopy (TEM). The magnetic NSrGO was then applied for the removal of the anionic dye Congo red (CR) from water samples. Optimization of key parameters—pH, adsorbent dosage, and removal time—revealed that a pH of 4, 15 mg of adsorbent, and a 20-min removal time achieved over 90% removal efficiency. Adsorption isotherm analysis showed that CR adsorption onto magnetic NSrGO follows a multilayer process (the Freundlich isotherm model), with a maximum adsorption capacity of 135.1 mg/g. Additionally, the pseudo-first-order kinetic model best described the adsorption behavior of CR over time. The reusability assessment confirmed that magnetic NSrGO could be effectively employed over six consecutive adsorption/desorption cycles, consistently maintaining a removal efficiency above 80%. Overall, the results highlight the potential of magnetic NSrGO as an efficient and reusable adsorbent for the effective removal of CR from contaminated water.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ChemistrySelect>

ISSN

2365-6549

e-ISSN

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Volume of the periodical

10

Issue of the periodical within the volume

38

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

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UT code for WoS article

001591702000001

EID of the result in the Scopus database

2-s2.0-105018611290