Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Highly Porous Thin-Layer g-C3N4 Nanosheets with Enhanced Adsorption Capacity
Δημιουργός/Συγγραφέας:	Stefa, Sofia Griniezaki, Maria Dimitropoulos, Marinos Paterakis, George Galiotis, Costas Kiriakidis, George [EL] Κλώντζας, Εμμανουήλ[EN] Klontzas, Emmanuel Konsolakis, Michalis Binas, Vassilios
Ημερομηνία:	2023
Γλώσσα:	Αγγλικά
ISSN:	2574-0970
DOI:	10.1021/acsanm.2c04632
Περίληψη:	Herein, the physicochemical properties and enhanced adsorption capacity of highly porous thin-layer graphitic carbon nitride (g-C3N4) nanosheets (CNNs) in relation to the separation of dyes are investigated. Cationic and anionic dyes with similar sizes are adopted to study the adsorption and separation properties of graphitic carbon nitride. Highly porous g-C3N4 nanosheets were synthesized via the direct thermal polycondensation of melamine followed by a thermal exfoliation. A comparative study of bulk g-C3N4 and porous thin-film g-C3N4 nanosheets was carried out. The results revealed the formation of highly porous g-C3N4 nanosheets with a well-oriented structure and adequate chemical stability. Porous thin-layer g-C3N4 nanosheets possess a high surface area of 212 m2/g as compared to 10 m2/g of the bulk material. Interestingly, adsorption experiments employing both cationic (methylene blue, rhodamine 6G, and rhodamine B) and anionic (methyl orange, eosin Y) dyes, as well as their mixtures, revealed that g-C3N4 nanosheets exhibited excellent selective adsorption capacity toward cationic dyes, which is followed by very short equilibrium times (e.g., 100% adsorption of MB within 10 min). The present findings can be well interpreted in terms of improved textural and structural properties of CNNs in conjunction to the dispersion and electrostatic interactions between the different dyes and the surface of CNNs. The experimental findings are further corroborated by means of periodic self-consistent charge density functional tight binding theoretical calculations.
Τίτλος πηγής δημοσίευσης:	ACS Applied Nano Materials
Τόμος/Κεφάλαιο:	6
Τεύχος:	3
Σελίδες:	1732−1743
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Graphitic carbon nitride nanosheets Thermal exfoliation Adsorption capacity Anionic and cationic dyes Selectivity Stability
EU Grant:	LIFE VISIONS Enhancing Human Resources Research Potential by undertaking a Doctoral Research”
EU Grant identifier:	LIFE19 ENV/GR/000100
Κάτοχος πνευματικών δικαιωμάτων:	© 2023 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1021/acsanm.2c04632
Σημειώσεις:	This work was supported by LIFE VISIONS project (LIFE19 ENV/GR/000100) with the contribution of the LIFE Programme of the European Union. This work reflects only the authors’ view and CINEA is not responsible for any use that may be made of the information it contains. Part of the work was co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme “Human Resources Development, Education and Lifelong Learning” in the context of the Act “Enhancing Human Resources Research Potential by undertaking a Doctoral Research” Sub-action 2: IKY Scholarship Programme for PhD candidates in the Greek Universities. We would like also to thank Labros Papoutsakis for the TEM measurements at the Electron Microscopy Laboratory of the University of Crete.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο