The adsorption of dinitrogen tetroxide (N(2)O(4)) on multi-walled carbon nanotubes (MWCNTs) has been studied by FT-IR, Raman and X-ray photoelectron spectroscopy (XPS). The N(2)O(4) adsorption is fully reversible, and after the desorption there is no evidences of MWCNTs nitration. Instead, the MWCNTs have been found oxidized by the action of N(2)O(4). By thermogravimetric analysis (TGA) about 5% by weight of oxygenated groups have been found. Thermal analysis has revealed that MWCNTs having a surface area of 275 m(2)/g are able to reversibly adsorb about 25% by weight of N(2)O(4), a value comparable to that observed for certain active carbons.
The adsorption of dinitrogen tetroxide (N2O4) on multi-walled carbon nanotubes (MWCNTs) has been studied by FT-IR, Raman and X-ray photoelectron spectroscopy (XPS). The N2O4 adsorption is fully reversible, and after the desorption there is no evidences of MWCNTs nitration. Instead, the MWCNTs have been found oxidized by the action of N2O4. By thermogravimetric analysis (TGA) about 5% by weight of oxygenated groups have been found. Thermal analysis has revealed that MWCNTs having a surface area of 275 m(2)/g are able to reversibly adsorb about 25% by weight of N2O4, a value comparable to that observed for certain active carbons.
Adsorption of dinitrogen tetroxide (N(2)O(4)) on multi-walled carbon nanotubes (MWCNTs)
COMPAGNINI, Giuseppe Romano;D'URSO, LUISA;
2008-01-01
Abstract
The adsorption of dinitrogen tetroxide (N(2)O(4)) on multi-walled carbon nanotubes (MWCNTs) has been studied by FT-IR, Raman and X-ray photoelectron spectroscopy (XPS). The N(2)O(4) adsorption is fully reversible, and after the desorption there is no evidences of MWCNTs nitration. Instead, the MWCNTs have been found oxidized by the action of N(2)O(4). By thermogravimetric analysis (TGA) about 5% by weight of oxygenated groups have been found. Thermal analysis has revealed that MWCNTs having a surface area of 275 m(2)/g are able to reversibly adsorb about 25% by weight of N(2)O(4), a value comparable to that observed for certain active carbons.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
