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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

ChemistrySelect>

ISSN

2365-6549

e-ISSN

—

Svazek periodika

10

Číslo periodika v rámci svazku

38

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

001591702000001

EID výsledku v databázi Scopus

2-s2.0-105018611290