Artículo
Efficient generation of highly crystalline carbon quantum dots via electrooxidation of ethanol for rapid photodegradation of organic dyes
Barrionuevo, Santiago
; Fioravanti, Federico
; Nuñez, Jorge Martín
; Llaver, Mauricio
; Aguirre Myriam Haydee; Bellino, Martin Gonzalo
; Lacconi, Gabriela Ines
; Ibañez, Francisco Javier
Fecha de publicación:
08/2023
Editorial:
Royal Society of Chemistry
Revista:
Journal of Materials Chemistry C
ISSN:
2050-7526
e-ISSN:
2050-7534
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Achieving versatile routes to generate crystalline carbon-based nanostructures has become a fervent pursuit in photocatalysis-related fields. We demonstrate that the direct electrooxidation of ethanol, performed on Ni foam, yields ultra-small and highly crystalline graphene-like structures named carbon quantum dots (CQDs). We perform simulations of various sp2 and sp3 domains in order to understand the optical properties of CQDs by accounting their contribution as absorbance/luminescent centers in the overall optical response. Experiments and simulations reveal that absorbance bands for as-synthesized CQDs are dominated by small sp2 domains comprised of ≤7 aromatic-rings. After 48 h synthesis, the dispersion transition from yellow to red, exhibiting new and red shifted absorbance bands. Furthermore, fluorescence emission is governed by medium-sized sp2 domains (with aromatic ring counts ≤12) and oxygen-containing groups. These oxygen-rich groups within the CQDs, confirmed by FT-IR and XPS, are responsible for the fast photodegradation of organic dyes, with ∼90% of methylene blue (MB) being degraded within the first 5 min of light exposure. Our work provides crucial insights about the electrochemical synthesis and overall optical properties of carbon nanostructures, while being effective and reliable toward the degradation of contaminants in water.
Palabras clave:
CRYSTALLINE
,
CARBON QUANTUM DOTS
,
PHOTODEGRADATION
,
DYES
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Colecciones
Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos (UE-INN - NODO CONSTITUYENTES)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO CONSTITUYENTES
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO CONSTITUYENTES
Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Barrionuevo, Santiago; Fioravanti, Federico; Nuñez, Jorge Martín; Llaver, Mauricio; Aguirre Myriam Haydee; et al.; Efficient generation of highly crystalline carbon quantum dots via electrooxidation of ethanol for rapid photodegradation of organic dyes; Royal Society of Chemistry; Journal of Materials Chemistry C; 11; 34; 8-2023; 11719-11729
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