Mass spectrometry of graphene oxide thermal reduction in vacuum

0572928 - ÚJF 2024 RIV GB eng J - Článek v odborném periodiku
Torrisi, L. - Silipigni, L. - Cutroneo, Mariapompea - Torrisi, A.
Mass spectrometry of graphene oxide thermal reduction in vacuum.
Radiation Effects and Defects in Solids. Roč. 178, 1-2 (2023), s. 28-39. ISSN 1042-0150. E-ISSN 1029-4953
Institucionální podpora: RVO:61389005
Klíčová slova: graphene * graphene oxide reduction * degassing * thermal treatment * FTIR * EDX
Obor OECD: Nuclear physics
Impakt faktor: 1, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1080/10420150.2023.2186867

Foils of graphene oxide (GO) prepared by micrometric graphene oxide platelets dispersed in water at low concentrations were physically investigated during their thermal reduction in a vacuum. The water, the carbon dioxide and the functional groups of oxygen, degassed during the thermal treatment, were monitored for the first time with a quadrupole mass spectrometer as a function of the foil temperature. Fourier transform infrared (FTIR) spectroscopy and energy dispersive X-rays (EDX) analyses were also presented to confirm the modality of reduction in vacuum. The thermal reduction process increases the C/O atomic ratio from the pristine value of about 2.0 to about 4.5 using a temperature of about 200 degrees C. The reduced graphene oxide (rGO), depleted of water and some functional oxygen groups, shows a more compact structure with an increment of the density from the pristine value of about 1.36 g/cm(3) to about 1.9 g/cm(3), which determines a decreasing of the distance between the graphene layers.
Trvalý link: https://hdl.handle.net/11104/0343452