| Texto completo | |
| Autor(es): Mostrar menos - |
Torquato, Lilian Danielle de Moura
;
Lacalamita, Dario
;
Matteucci, Rosa Maria
;
Franco, Jefferson Honorio
;
Labarile, Rossella
;
Perrotta, Alberto
;
Trotta, Massimo
;
Farinola, Gianluca Maria
;
Zanoni, Maria Valnice Boldrin
;
Grattieri, Matteo
;
Stufano, Paolo
Número total de Autores: 11
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the Electrochemical Society; v. 171, n. 5, p. 8-pg., 2024-05-01. |
| Resumo | |
The development of bioelectrochemical systems requires careful selection of both their biotic and abiotic components to obtain sustainable devices. Herein, we report a biophotoelectrode obtained with polyhydroxybutyrate (PHB), a biopolymer, which purple non-sulphur bacteria produce as an energy stock under specific environmental conditions. The electrode was obtained by casting a mixture composed of PHB and carbon fibers in a 3:2 mass ratio. Following, the composite material was modified with polydopamine and thermally treated to obtain a hydrophilic electrode with improved electrochemical behavior. The bio-based electrode was tested with metabolically active cells of Rhodobacter capsulatus embedded in a biohybrid matrix of polydopamine. The system achieved enhanced catalytic activity under illumination, with an 18-fold increase in photocurrent production compared to biophotoelectrodes based on glassy carbon, reaching a current density of 12 +/- 3 mu A cm-2, after 30 min of light exposure at +0.32 V. The presented biocompatible electrode provides a sustainable alternative to metal-based and critical raw material-based electrodes for bioelectrochemical systems. Biobased electrode for microbial electrochemical systems.Bacteria-produced polymer for devices with enhanced colonization.Improved biofilm formation and photocurrent generation. (AU) | |
| Processo FAPESP: | 21/09471-2 - Aprimoramento do processo extracelular de transferência de elétrons em bactérias roxas para o aumento na produção de eletricidade e compostos químicos em sistemas foto-bioeletroquímicos |
| Beneficiário: | Lilian Danielle de Moura Torquato |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |