US 12,434,984 B2
Method to prepare graphene coated sponges, sponges obtained thereof, electrodes obtained from such sponges and uses of the sponges for water treatment
Jelena Radjenovic, Girona (ES); Luis Miguel Baptista Pires, Girona (ES); Giannis-Florjan Norra, Girona (ES); and Nick Duinslaeger, Girona (ES)
Appl. No. 18/029,399
Filed by Institució Catalana de Recerca i Estudis Avançats, Barcelona (ES); and Fundació Institut Català de Recerca de l'Aigua, Girona (ES)
PCT Filed Sep. 30, 2021, PCT No. PCT/EP2021/076930
§ 371(c)(1), (2) Date Mar. 30, 2023,
PCT Pub. No. WO2022/069621, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 20382879 (EP), filed on Oct. 2, 2020.
Prior Publication US 2023/0357057 A1, Nov. 9, 2023
Int. Cl. C02F 1/461 (2023.01)
CPC C02F 1/46109 (2013.01) [C02F 2001/46138 (2013.01); C02F 2001/46161 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method to prepare a graphene coated sponge-based electrode comprising:
obtaining a graphene coated sponge by:
filling mineral wool with a solution comprising graphene material by successive squeezing to obtain a mineral wool soaked with graphene material;
transferring the mineral wool soaked with graphene material into a hydrothermal reactor and submitting it to heating from 60 to 240° C. for 5 minutes to 72 hours to have graphene material bonded to mineral wool;
cleaning the heated material to remove the unbonded graphene material and reaction by-products from the graphene coated mineral wool; and
connecting the graphene coated sponge to electrical current.