Large area continuous multilayer graphene membrane for water desalination
[EN] This manuscript reports the preparation of a large area (84 cm2) desalination membrane based on multilayers (11 nm thickness) of B,N-codoped defective graphene. The process consists of coating a porous ceramic ?-Al2O3 support (100 nm pore size) with a continuous nanometric (50 nm) chitosan film...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/183155 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/183155 |
| Access Level: | acceso abierto |
| Palabra clave: | Desalination membrane Multilayer graphene membrane Subnanometric pores on graphene Atom vacancies on graphene Dopant removal on graphene QUIMICA ORGANICA |
| Sumario: | [EN] This manuscript reports the preparation of a large area (84 cm2) desalination membrane based on multilayers (11 nm thickness) of B,N-codoped defective graphene. The process consists of coating a porous ceramic ?-Al2O3 support (100 nm pore size) with a continuous nanometric (50 nm) chitosan film containing adsorbed (NH4)3BO3. Subsequent pyrolysis in the presence of hydrogen converts chitosan into multilayer defective B,N-codoped graphene. The partial removal of B and N dopant atoms by H2 during the pyrolysis causes the generation of subnanometric pores due to atom vacancy, as determined by control experiments in the absence of this gas. A NaCl and KCl removal efficiency from brackish water higher than 95% for a permeate flux of 24.3 L m- 2 h-1 at 10 bars were achieved. |
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