Photoenhanced interfacial electron transfer of a dual functional hematite biophotoelectrode

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

View graph of relations

Author(s)

  • Man Hin Chong
  • Minshu Du
  • Li Ji
  • Xingli Zou
  • Guizheng Zou
  • Hsin-Hui Shen
  • Shella Permatasari Santoso
  • Wenxin Niu
  • Fang-Fang Li

Detail(s)

Original languageEnglish
Pages (from-to)11303-11311
Journal / PublicationJournal of Materials Chemistry C
Volume11
Issue number33
Online published12 Jul 2023
Publication statusPublished - 7 Sept 2023

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 Fe2O3 photoelectrode exhibits a photocurrent of 1.093 A m−2 at 0.8 V under visible light, whereas the Fe2O3-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 Fe2O3 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 Fe2O3-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. © 2023 The Royal Society of Chemistry.

Citation Format(s)

Photoenhanced interfacial electron transfer of a dual functional hematite biophotoelectrode. / Mak, Chun Hong; Peng, Yong; Chong, Man Hin et al.
In: Journal of Materials Chemistry C, Vol. 11, No. 33, 07.09.2023, p. 11303-11311.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review