Photo-induced and electrochemical applications of carbon based-nanoparticles from spent coffee grounds
Autor
Bettini, Simona
Ottolini, Michela
Coccimiglio, Mariafrancesca
Pagano, Rosanna
García-Caballero, Valentín
Cano, Manuel
Giner-Casares, Juan J.
Valli, Ludovico
Giancane, Gabriele
Editor
ACSFecha
2024Materia
Cadmium sulfideChromatography
Oxygen
Redox reactions
X-ray photoelectron spectroscopy
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The interest of the scientific community toward carbon-based nanostructures is justified by the wide range of applications of such multifaceted structures. In the present work, carbon nanoparticles (CNPs) were synthesized, in mild conditions, by using spent coffee grounds as the carbon source. Green-emitting CNPs of about 40 nm were obtained, and they were characterized by X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, fluorescence spectroscopy, and Fourier transform infrared spectroscopy, highlighting that they are naturally doped with N, K, Mg, and P. Such intrinsic doping promotes the characteristic green emission; furthermore, the N- and P-doping prompted us to evaluate their ability to photoproduce 1O2 for PDT applications. The presence of heteroatoms in the CNP structure was also used to electrochemically promote the oxygen reduction reaction and hydrogen evolution reaction catalysis.
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