Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO2) for effective elimination of water pollutants

Pinelopi P. Falara; Islam Ibrahim; Adamantia Zourou; Labrini Sygellou; David Emanuel Sanchez; George Em Romanos; Lida Givalou; Maria Antoniadou; Michalis K. Arfanis; Changseok Han; Mauricio Terrones; Konstantinos V. Kordatos

doi:10.1007/s11356-023-27285-7

Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO₂) for effective elimination of water pollutants

Pinelopi P. Falara, Islam Ibrahim, Adamantia Zourou, Labrini Sygellou, David Emanuel Sanchez, George Em Romanos, Lida Givalou, Maria Antoniadou, Michalis K. Arfanis, Changseok Han, Mauricio Terrones, Konstantinos V. Kordatos

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Abstract

In this study, carbon quantum dots (C-QDs), prepared via hydrothermal-microwave procedures, were successfully combined with nanostructured titania (TiO₂). The photocatalytic oxidation/reduction activity of the C-QDs/TiO₂ composite films was evaluated in the decomposition of organic-inorganic contaminants from aqueous solutions under UV illumination. Physicochemical characterizations were applied to investigate the crystal structure of the carbon quantum dots and the composites. It was found that the prepared C-QDs/TiO₂ composites had great contribution to the photocatalytic reduction of hexavalent chromium (Cr⁺⁶) species and 4-Nitrophenol (PNP) as well as to the photocatalytic oxidation of methylene blue (MB) and Rhodamine B (RhB) dyes. The mechanism of the photocatalytic reaction was studied with trapping experiments, revealing that the electron (e⁻) radical species were powerfully supported for the photocatalytic reduction of Cr⁺⁶ and PNP and the holes (h ⁺) are the main active species for the photocatalytic oxidation reactions.

Original language	English (US)
Pages (from-to)	124976-124991
Number of pages	16
Journal	Environmental Science and Pollution Research
Volume	30
Issue number	60
DOIs	https://doi.org/10.1007/s11356-023-27285-7
State	Published - Dec 2023

All Science Journal Classification (ASJC) codes

Environmental Chemistry
Pollution
Health, Toxicology and Mutagenesis

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10.1007/s11356-023-27285-7

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Falara, P. P., Ibrahim, I., Zourou, A., Sygellou, L., Sanchez, D. E., Romanos, G. E., Givalou, L., Antoniadou, M., Arfanis, M. K., Han, C., Terrones, M., & Kordatos, K. V. (2023). Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO₂) for effective elimination of water pollutants. Environmental Science and Pollution Research, 30(60), 124976-124991. https://doi.org/10.1007/s11356-023-27285-7

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title = "Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO2) for effective elimination of water pollutants",

abstract = "In this study, carbon quantum dots (C-QDs), prepared via hydrothermal-microwave procedures, were successfully combined with nanostructured titania (TiO2). The photocatalytic oxidation/reduction activity of the C-QDs/TiO2 composite films was evaluated in the decomposition of organic-inorganic contaminants from aqueous solutions under UV illumination. Physicochemical characterizations were applied to investigate the crystal structure of the carbon quantum dots and the composites. It was found that the prepared C-QDs/TiO2 composites had great contribution to the photocatalytic reduction of hexavalent chromium (Cr+6) species and 4-Nitrophenol (PNP) as well as to the photocatalytic oxidation of methylene blue (MB) and Rhodamine B (RhB) dyes. The mechanism of the photocatalytic reaction was studied with trapping experiments, revealing that the electron (e−) radical species were powerfully supported for the photocatalytic reduction of Cr+6 and PNP and the holes (h +) are the main active species for the photocatalytic oxidation reactions.",

author = "Falara, {Pinelopi P.} and Islam Ibrahim and Adamantia Zourou and Labrini Sygellou and Sanchez, {David Emanuel} and Romanos, {George Em} and Lida Givalou and Maria Antoniadou and Arfanis, {Michalis K.} and Changseok Han and Mauricio Terrones and Kordatos, {Konstantinos V.}",

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year = "2023",

month = dec,

doi = "10.1007/s11356-023-27285-7",

language = "English (US)",

volume = "30",

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Falara, PP, Ibrahim, I, Zourou, A, Sygellou, L, Sanchez, DE, Romanos, GE, Givalou, L, Antoniadou, M, Arfanis, MK, Han, C, Terrones, M & Kordatos, KV 2023, 'Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO₂) for effective elimination of water pollutants', Environmental Science and Pollution Research, vol. 30, no. 60, pp. 124976-124991. https://doi.org/10.1007/s11356-023-27285-7

Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO₂) for effective elimination of water pollutants. / Falara, Pinelopi P.; Ibrahim, Islam; Zourou, Adamantia et al.
In: Environmental Science and Pollution Research, Vol. 30, No. 60, 12.2023, p. 124976-124991.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO2) for effective elimination of water pollutants

AU - Falara, Pinelopi P.

AU - Ibrahim, Islam

AU - Zourou, Adamantia

AU - Sygellou, Labrini

AU - Sanchez, David Emanuel

AU - Romanos, George Em

AU - Givalou, Lida

AU - Antoniadou, Maria

AU - Arfanis, Michalis K.

AU - Han, Changseok

AU - Terrones, Mauricio

AU - Kordatos, Konstantinos V.

PY - 2023/12

Y1 - 2023/12

N2 - In this study, carbon quantum dots (C-QDs), prepared via hydrothermal-microwave procedures, were successfully combined with nanostructured titania (TiO2). The photocatalytic oxidation/reduction activity of the C-QDs/TiO2 composite films was evaluated in the decomposition of organic-inorganic contaminants from aqueous solutions under UV illumination. Physicochemical characterizations were applied to investigate the crystal structure of the carbon quantum dots and the composites. It was found that the prepared C-QDs/TiO2 composites had great contribution to the photocatalytic reduction of hexavalent chromium (Cr+6) species and 4-Nitrophenol (PNP) as well as to the photocatalytic oxidation of methylene blue (MB) and Rhodamine B (RhB) dyes. The mechanism of the photocatalytic reaction was studied with trapping experiments, revealing that the electron (e−) radical species were powerfully supported for the photocatalytic reduction of Cr+6 and PNP and the holes (h +) are the main active species for the photocatalytic oxidation reactions.

AB - In this study, carbon quantum dots (C-QDs), prepared via hydrothermal-microwave procedures, were successfully combined with nanostructured titania (TiO2). The photocatalytic oxidation/reduction activity of the C-QDs/TiO2 composite films was evaluated in the decomposition of organic-inorganic contaminants from aqueous solutions under UV illumination. Physicochemical characterizations were applied to investigate the crystal structure of the carbon quantum dots and the composites. It was found that the prepared C-QDs/TiO2 composites had great contribution to the photocatalytic reduction of hexavalent chromium (Cr+6) species and 4-Nitrophenol (PNP) as well as to the photocatalytic oxidation of methylene blue (MB) and Rhodamine B (RhB) dyes. The mechanism of the photocatalytic reaction was studied with trapping experiments, revealing that the electron (e−) radical species were powerfully supported for the photocatalytic reduction of Cr+6 and PNP and the holes (h +) are the main active species for the photocatalytic oxidation reactions.

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U2 - 10.1007/s11356-023-27285-7

DO - 10.1007/s11356-023-27285-7

M3 - Article

C2 - 37160858

AN - SCOPUS:85158962325

SN - 0944-1344

VL - 30

SP - 124976

EP - 124991

JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

IS - 60

ER -

Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO₂) for effective elimination of water pollutants

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