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Carbon nano-onions (CNOs), in their spherical or polyhedral forms, represent an important class of nanomaterials, due to their peculiar physical and electrochemical properties. Among the different methods of production, arc discharge between graphite electrodes sustained by deionized water is one of the most promising to obtain good quality CNOs in gram quantities. We applied the method with the aim to optimize the production of CNOs, using an innovative experimental arrangement. The discharges generate dispersed nanomaterials and a black hard cathodic deposit, which were studied by transmission electron microscopy–high-resolution TEM, scanning electron microscopy, Raman, thermogravimetric analysis and energy-dispersive x-ray spectroscopy. A simple mechanical grinding of the deposits permitted us to obtain turbostratic polyhedral CNOs that exhibited higher stability towards burning in air …
IOP Publishing
Publication date: 
6 Jun 2018

Francesca Alessandro, Andrea Scarcello, MD Basantes Valverde, DC Coello Fiallos, SM Osman, Anna Cupolillo, Melvin Arias, O Arias de Fuentes, Giorgio De Luca, Alfredo Aloise, Efrem Curcio, G Nicotra, C Spinella, LS Caputi

Biblio References: 
Volume: 29 Issue: 32 Pages: 325601