Fluorinated cage multiwall carbon nanoparticles

Adsorption of fluoride from water by amorphous alumina supported on carbon nanotubes

“…4 shows that the adsorption capacity of the CNTs is slightly lower than that of c-Al 2 O 3 at lower equilibrium fluoride concentration, however, their almost coincident adsorption isotherms at higher equilibrium fluoride concentration suggest that the CNTs possess adsorption capacity for fluoride as good as c-Al 2 O 3 . The good fluoride adsorption capacity of the CNTs may be due to the role of fluorination for CNTs [23,24] and/or the functional groups introduced by oxidation [25].…”

Progress of synthesizing methods and properties of fluorinated carbon nanotubes

“…Okotrub et al [38] synthesized F-MWNTs by this method and found that C-F bond was in the covalent state and the inner layers of graphene, even the fifteenth layer inside MWNTs, could be fluorinated as well. Lavskaya et al [39] utilized this method to fluorinate SWNTs and few-walled nanotubes (FWNTs) and they found that the ratio of fluorine to carbon (F/C) was in the range from 0.03 to 0.08 and the content of fluorine in fluorinated FWNTs (F-FWNTs) was lower than that of F-SWNTs, which was caused by the un-fluorinated inner layers of graphene.…”

Fluorination of CN x Nanotubes

“…Fluorination of catalytic MWNTs using a gaseous mixture of F 2 , HF, IF 5 was shown to proceed at room temperature yielding CF x compounds with a limited fluorine content x ≤ 0.4. [2]Arc-produced MWNTs were fluor inated with volatile BrF 3 and Br 2 up to C 1 F 0.3 Br 0.02 composition. [3,4] Rather low fluorination degree MWNTs is due to attaching of fluorine atoms to the surface layers mainly.…”

“…[2]Arc-produced MWNTs were fluor inated with volatile BrF 3 and Br 2 up to C 1 F 0.3 Br 0.02 composition. [3,4] Rather low fluorination degree MWNTs is due to attaching of fluorine atoms to the surface layers mainly. N-doping of carbon nanotubes yields electron-rich strictures [5] characterized by metallic behavior and high density of field emission current.…”

“…[3,4] The sample placed in a teflon flask was held in a vapor of liquidBr 2 for 24 hr and then in a vapor over a solution BrF 3 (2 g) in Br 2 (5 g) for 7 days. Thereafter the flask content was dried by a flow of N 2 up to the termination of Br 2 evolution (~ 48 hr).…”