US 2025/0033000 A1 · PROCESS FOR OBTAINING REDUCED GRAPHENE OXIDE MEMBRANES, REACTOR FOR CARRYING OUT SAID PROCESS, REDUCED GRAPHENE OXIDE MEMBRANES OBTAINED FROM THIS PROCESS AND THEIR USES IN A SEPARATION PROCESS

Process for obtaining reduced graphene oxide membranes, reactor for carrying out said process, reduced graphene oxide membranes obtained from this process and their uses in a separation process

OwnerRodrigo Suhett De Souza, Camila Marchetti Maroneze +8inventors

InventorsRODRIGO SUHETT DE SOUZA, CAMILA MARCHETTI MARONEZE, RICARDO DE ARAUJO CID DA SILVA, MARCOS ALVES DOS SANTOS, CECILIA DE CARVALHO CASTRO E SILVA, SERGIO HUMBERTO DOMINGUES, LEANDRO HOSTERT, MARCUS VINICIUS DE PAIVA, MATHEUS SANTOS DIAS, HALINE BACHMANN PINTO

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Abstract

The present invention refers to a process for obtaining reduced graphene oxide (rGO) porous membranes, homogeneous, without cracks, using very low quantities of graphene oxide (GO) nanosheets, highly adhered to the porous support and with high mechanical stability. The obtained rGO membranes present high quality and excellent operational efficiency and can be used in applications involving separation of ionic, molecular and biological species in liquid and gaseous phases, such as the treatment of water and industrial effluents and/or gas purification. Furthermore, the present invention also describes an ideal reactor to make it possible to obtain said reduced graphene oxide membranes obtained by the process described herein.

Claims11

Dependent claims

A process for obtaining a reduced graphene oxide (rGO) membrane, the process comprising:

a. preparing a graphene oxide (GO) membrane;
b. optionally, heat treating the GO membrane, with heating from 50° C. to 250° C., between 10 min and 720 min, resulting in membranes named herein as TrGO;
and
c. chemically reducing the graphene oxide membrane or the TrGO in a reactor containing a hydrazine solution and a support for fixing the membranes, at a temperature between 5° C. and 120° C., and for a time lasting between 2 min and 1440 min.

1 more element

Dependencies are inferred from the claim text.