Enhancing proton transport in polyvinylidenedifluoride membranes and reducing biofouling for improved hydrogen production in microbial electrolysis cells.
Bioresour Technol
; 402: 130842, 2024 Jun.
Article
em En
| MEDLINE
| ID: mdl-38750828
ABSTRACT
Hydrophilic porous membranes, exemplified by polyvinylidene fluoride (PVDF) membranes, have demonstrated significant potential for replacing ion exchange membranes in microbial electrolysis cells (MECs). Membrane fouling remains a major challenge in MECs, impeding proton transport and consequently limiting hydrogen production. This study aims to investigate a synergistic antifouling strategy for PVDF membrane through the incorporation of a coating composed of polydopamine (PDA), polyethyleneimine (PEI), and silver nanoparticles (AgNPs). The PDA-PEI-Ag@PVDF membrane not only effectively mitigates fouling through steric and electrostatic repulsion forces, but also amplifies ion transport by facilitating water diffusion and electromigration. The PDA-PEI-Ag@PVDF membrane exhibited a reduced membrane resistance of 1.01 mΩ m2 and PDA-PEI-Ag modifying PVDF membrane was found to be effective in enhancing the proton transportation of PVDF membrane. Therefore, the enhanced hydrogen production rate of 2.65 ± 0.02 m3/m3/d was achieved in PDA-PEI-Ag@PVDF-MECs.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Polivinil
/
Prótons
/
Prata
/
Fontes de Energia Bioelétrica
/
Eletrólise
/
Incrustação Biológica
/
Hidrogênio
/
Indóis
/
Membranas Artificiais
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article