Enhancing proton transport in polyvinylidenedifluoride membranes and reducing biofouling for improved hydrogen production in microbial electrolysis cells.
Bioresour Technol
; 402: 130842, 2024 Jun.
Article
in 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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polyvinyls
/
Protons
/
Silver
/
Bioelectric Energy Sources
/
Electrolysis
/
Biofouling
/
Hydrogen
/
Indoles
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Membranes, Artificial
Language:
En
Journal:
Bioresour Technol
Year:
2024
Document type:
Article