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The photoreduction potential of a set of four different carbon dots (CDs) was investigated. The CDs were synthesized by using two different preparation methods—hydrothermal and pyrolytic—and two sets of reagents—neat citric acid and citric acid doped with diethylenetriamine. The hydrothermal syntheses yielded amorphous CDs, which were either nondoped (a-CDs) or nitrogen-doped (a-N-CDs), whereas the pyrolytic treatment afforded graphitic CDs, either non-doped (g-CDs) or nitrogen-doped (g-N-CDs). The morphology, structure, and optical properties of four different types of CDs revealed significant differences depending on the synthetic pathway. The photocatalytic activities of the CDs were investigated as such, that is, in the absence of any other redox mediators, on the model photoreduction reaction of methyl viologen. The observed photocatalytic reaction rates: a-N-CDs ≥ g-CDs > a-CDs ≥ g-N-CDs …
American Chemical Society
Publication date: 
29 Oct 2018

Simone Cailotto, Raffaello Mazzaro, Francesco Enrichi, Alberto Vomiero, Maurizio Selva, Elti Cattaruzza, Davide Cristofori, Emanuele Amadio, Alvise Perosa

Biblio References: 
Volume: 10 Issue: 47 Pages: 40560-40567
ACS applied materials & interfaces