Nanoplatelet process for obtaining graphene oxide and graphene nanoplatelet

摘要

Procedure for obtaining nanoplatelet graphene oxide and graphene nanoplatelet, said method comprising the following steps: a) Dosing at least the following compounds (1): i. hydrocarbon or hydrocarbon mixture, ii. a nickel compound and a sulfur compound to generate catalyst particles iii. gas transport, b) Introduction of the compounds (1) dosed listed in step a) in an oven whose working temperature is between 900C and 1500C which is performed a process of chemical vapor deposition using the technique floating catalyst, c) Preparation of an intermediate material (3) comprising nanowires (3) carbon which structure comprises a tape continues graphitic material wherein said tape has a stack of less than eleven graphene layers spirally wound environment and along the major axis "s" of such nanowires, d) heat treatment of the nanowires (3) carbon obtained in step c) by exposing it to a temperature between 1500 ° c and 3000 ° c in an inert atmosphere, for purification, dehydrogenation, defunctionalization and crystallization of said nanowires (3) resulting in a modified structure in which the number of e nlaces Carbon-Carbon is increased relative to the number of such bonds present in the nanowires (3) carbon obtained in step c), e) Etching comprising a phase of liquid phase oxidation of nanowires (4) carbon treated in step d) causing fractionation and initiating the delamination of the graphene layers which compose wherein - the liquid phase oxidation is carried out in a dehydrated medium, - the liquid phase oxidation step e) is preceded by a stage of interleaving the graphene layers and said interleaving is performed in an acidic medium, f) Completion of exfoliation process nanofilaments (4) carbon by a physical process for obtaining nanoplatelet (5 ) graphene oxide with the following characteristics: - polygonal geometry, - a number of layers of infe-rior to six layers, stacked graphene - a maximum length of between 0.1 .mu.m and 50 .mu.m .