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Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation

Matos, Renata ; Nunes, Marta S. ; Kuźniarska‐Biernacka, Iwona ; Rocha, Mariana ; Guedes, Alexandra ; Estrada, Ana C. ; Lopes, Joana L. ; Trindade, Tito ; Freire, Cristina

European journal of inorganic chemistry, 2021-12, Vol.2021 (47), p.4915-4928 [Periódico revisado por pares]

Weinheim: Wiley Subscription Services, Inc

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Título:
Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation
Autor: Matos, Renata ; Nunes, Marta S. ; Kuźniarska‐Biernacka, Iwona ; Rocha, Mariana ; Guedes, Alexandra ; Estrada, Ana C. ; Lopes, Joana L. ; Trindade, Tito ; Freire, Cristina
Assuntos: 4-nitrophenol ; Catalysts ; Catalytic activity ; Copper sulfides ; Covellite ; Crystallites ; Degradation ; Flakes ; Graphene ; Heat treatment ; Inorganic chemistry ; Iron oxides ; Materials science ; Nanocomposites ; Nanoparticles ; Nitrophenol ; Photo-Fenton catalysts ; Photocatalysis ; S-doped graphene ; Structural stability
É parte de: European journal of inorganic chemistry, 2021-12, Vol.2021 (47), p.4915-4928
Descrição: 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. Successful prepared S‐doped graphene nanocomposites with CuS and/or Fe3O4 nanoparticles presented interesting efficiency as photo‐Fenton catalysts for the 4‐nitrophenol degradation. The tri‐component nanocomposite exhibited the best catalytic activity, with 95.2 % of 4‐NP degradation. The CuS nanoparticles showed an important role in the improvement of the photo‐Fenton‐like catalytic activity.
Editor: Weinheim: Wiley Subscription Services, Inc
Idioma: Inglês

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Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation

Matos, Renata ; Nunes, Marta S. ; Kuźniarska‐Biernacka, Iwona ; Rocha, Mariana ; Guedes, Alexandra ; Estrada, Ana C. ; Lopes, Joana L. ; Trindade, Tito ; Freire, Cristina

Weinheim: Wiley Subscription Services, Inc

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