authors |
Matos, R; Nunes, MS; Kuzniarska-Biernacka, I; Rocha, M; Guedes, A; Estrada, AC; Lopes, JL; Trindade, T; Freire, C |
nationality |
International |
journal |
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
author keywords |
Materials science; Nanocomposites; 4-nitrophenol; Photocatalysis; Photo-Fenton catalysts; S-doped graphene |
keywords |
RAY PHOTOELECTRON-SPECTROSCOPY; ADVANCED OXIDATION PROCESSES; MICROWAVE-ASSISTED SYNTHESIS; SULFUR-DOPED GRAPHENE; FE3O4 NANOPARTICLES; PHOTOCATALYTIC DEGRADATION; ORGANIC POLLUTANTS; ELECTROCATALYTIC ACTIVITY; ELECTRO-FENTON; HETEROGENEOUS CATALYST |
abstract |
Herein, S-doped graphene flakes-based composites with Fe3O4 and/or CuS nanoparticles (NPs) are reported as photo-Fenton catalysts for the 4-nitrophenol (4-NP) degradation. The S-doped graphene flakes (S-GF) were prepared using a thermal treatment approach, and the nanocomposites by the in situ growth of Fe3O4 and/or CuS onto the S-GF scaffold. The characterization methods confirmed the formation of two- and three-components nanocomposites. The Fe3O4 NPs presented a cubic inverse spinel structure and the CuS phases a covellite structure, both with smaller crystallite sizes in the nanocomposites. The new nanocomposites showed higher ability to catalyze the photo-Fenton 4-NP degradation than the individual components. The S-GF@CuS-Fe3O4 nanocomposite exhibited the best catalytic activity: 95.2 % of 4-NP degradation, a kinetic of pseudo-first order (k=0.016 min(-1)), high photo-Fenton catalytic stability and catalyst's composition/structure preservation. The CuS NPs showed an important role in the photo-Fenton-like catalytic activity improvement. |
publisher |
WILEY-V C H VERLAG GMBH |
issn |
1434-1948 |
isbn |
1099-0682 |
year published |
2021 |
volume |
2021 |
issue |
47 |
beginning page |
4915 |
ending page |
4928 |
digital object identifier (doi) |
10.1002/ejic.202100700 |
web of science category |
14 |
subject category |
Chemistry, Inorganic & Nuclear |
unique article identifier |
WOS:000725354500001
|