Flower-like FeMoO4@1T-MoS2 micro-sphere for effectively cleaning binary dyes via photo-Fenton oxidation.
J Colloid Interface Sci
; 622: 284-297, 2022 Sep 15.
Article
en En
| MEDLINE
| ID: mdl-35512592
ABSTRACT
Right here, flower-like FeMoO4@1T-MoS2 composites were prepared by modifying FeMoO4 microspheres with two-dimensional lamellar 1T-MoS2 as co-catalyst, which was used for photo-Fenton catalysis degradation of binary dyes mixed with methylene blue (MB) and rhodamine B (RhB). Then various parameters affecting the generation of ·OH in the system were investigated. Systematic research shows that the degradation efficiency of MB and RhB can reach 99.8% in 18 min when the Mo/Fe molar ratio of the composite is 11. Furthermore, these experiments data were fitted by pseudo-first order kinetics model and pseudo-second order kinetics model. Subsequently the density functional theory (DFT) simulation results showed that FeMoO4 exhibited excellent adsorption for H2O2, and the introduction of 1T-MoS2 played a certain role in the adsorption and activation of H2O2. Finally, the degradation pathways of MB and RhB were proposed to determine intermediates during photo-Fenton process by LC-MS and the reaction mechanism was detailed investigated by quenching experiment of active free radicals. FeMoO4@1T-MoS2 has also excellent stability and highlights the potential and prospect of the composite for dye wastewater treatment.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Colorantes
/
Peróxido de Hidrógeno
Idioma:
En
Revista:
J Colloid Interface Sci
Año:
2022
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Article