[en] This work systematically compares both structural features and photocatalytic performance of a series of graphitic and amorphous carbon dots (CDs) prepared in a bottom-up manner from fructose, glucose, and citric acid. We demonstrate that the carbon source and synthetic procedures diversely affect the structural and optical properties of the CDs, which in turn unpredictably influence their photo electron transfer ability. The latter was evaluated by studying the photo-reduction of methyl viologen. Overall, citric acid-CDs were found to provide the best photocatalytic performance followed by fructose- and glucose-CDs. However, while the graphitization of glucose- and citric acid-CDs favored the photo-reaction, a reverse structure-activity dependence was observed for fructose-CDs due to the formation of a large graphitic-like supramolecular assembly. This study highlights the complexity to design in advance photo-active bio-based carbon nanomaterials.
Disciplines :
Chemistry
Author, co-author :
Amadio, Emanuele; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Cailotto, Simone ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Campalani, Carlotta ; Université de Liège - ULiège > Département de chimie (sciences) > Center for Integrated Technology and Organic Synthesis ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Branzi, Lorenzo; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Raviola, Carlotta ; PhotoGreen Lab, Department of Chemistry, University of Pavia, 27100 Pavia, Italy
Ravelli, Davide ; PhotoGreen Lab, Department of Chemistry, University of Pavia, 27100 Pavia, Italy
Cattaruzza, Elti ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Trave, Enrico; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Benedetti, Alvise ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Selva, Maurizio ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Perosa, Alvise ; Department of Molecular Sciences and Nanosystems, Ca' Foscari university of Venice, 30172 Venezia Mestre, Italy
Language :
English
Title :
Precursor-Dependent Photocatalytic Activity of Carbon Dots.
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