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16.01.2024 | Composites & nanocomposites

High efficiency of graphene/CoFe₂O₄ nanomaterial in the photocatalytic conversion of CO₂ dissolved in water under solar irradiation simulator

verfasst von: Clécia Andrade dos Santos, João Angelo Lima Perini, Kallyni Irikura, Luciane Pimenta Cruz Romão, Maria V. Boldrin Zanoni

Erschienen in: Journal of Materials Science | Ausgabe 4/2024

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Abstract

The present work describes the excellent performance of GH–CoFe₂O₄ photocatalysts based on graphene ferrite, synthesized using water rich in natural organic matter (NOM) as a solvent, for the photocatalytic reduction of CO₂ under artificial visible light, at ambient temperature and pressure. The nano-photocatalysts presented excellent photocatalytic activity, with high selectivity towards the conversion of CO₂ to methanol as the main product, for both semiconductors tested (CoFe₂O₄ and GH–CoFe₂O₄). The presence of graphene improved photoexcitation under visible light, decreasing the CoFe₂O₄ band gap value from 1.47 to 1.25 eV, resulting in decreased recombination of the e⁻/h⁺ pairs. The rates of formation of methanol were 1105.7 and 1389.9 µmol g⁻¹ h⁻¹ for CoFe₂O₄ and GH–CoFe₂O₄, respectively. The findings reveal the potential of photocatalysts based on ferrite and graphene for use in the conversion of CO₂ dissolved in water without any added chemical into high added-value products.

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Nächster Artikel In situ assembly of well-dispersed Fe0.64Ni0.36 nanoparticles on electro-spun carbon nanofibers (CNFs) for efficient microwave absorption

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Titel: High efficiency of graphene/CoFe2O4 nanomaterial in the photocatalytic conversion of CO2 dissolved in water under solar irradiation simulator
verfasst von: Clécia Andrade dos Santos
João Angelo Lima Perini
Kallyni Irikura
Luciane Pimenta Cruz Romão
Maria V. Boldrin Zanoni
Publikationsdatum: 16.01.2024
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 4/2024
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-023-09289-3

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