In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 33 ( 2023), p. 11303-11311
Abstract:
A promising method to boost the effectiveness of bioelectrochemical systems is to combine the light-harvesting properties of semiconductors with the catalytic strength of bacteria. Here, we demonstrate the improved photocurrents generated by the interaction of Shewanella oneidensis MR-1 and a hematite nanowire-arrayed photoanode in a solar-assisted microbial photoelectrochemical cell (S-MPEC) under visible light. The S-MPEC uses the technology of bioelectrochemical cells and photoelectrochemical cells (PECs) for enhancing the degradation of pollutants from wastewater treatment under irradiation. The bare Fe 2 O 3 photoelectrode exhibits a photocurrent of 1.093 A m −2 at 0.8 V under visible light, whereas the Fe 2 O 3 -MR-1 biophotoelectrode exhibits a higher photocurrent of 1.605 A m −2 . With visible light exposure at an intensity of less than 100 mW cm −2 , the power densities of the Fe 2 O 3 photoelectrode system with and without coating the MR-1 bacteria are 1.284 W m −2 and 0.872 W m −2 , respectively. Besides, based on the study of the heterogeneous electron transfer kinetics, the reduction and oxidation reactions of Fe 2 O 3 -MR-1 exhibit more efficient diffusion coefficients with enhanced rate constants. These findings demonstrate a significant impact on degradation performance induced by photoexcited charge carriers in a complicated hybrid electricigen system, which is critical for the development of a S-MPEC for waste degradation.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702245-6
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