The efficient production of acetate from HCO3− by the nonphotosynthetic bacterium Serratia marcescens Q1 is demonstrated in an anaerobic, photo-assisted, microbial electrosynthesis (MES) system incorporating a Ag3PO4/g-C3N4 biocathode. The Ag3PO4/g-C3N4 formed a Z-scheme photocatalytic heterojunction structure with enhanced redox capacity. The photocorrosion of Ag3PO4 was inhibited by the production of H2O2 in-situ, through water oxidation driven by the photogenerated holes on the Ag3PO4 valence band. The photoinduced electrons on the conduction band of g-C3N4 instead produced H2, which was metabolized by the Q1 electrotroph with HCO3− to produce acetate at a rate of 5.4 mM/d with a CEacetate of 93 % at a current density of 3.3 A/m2. The MES accumulated up to 81.0 mM with a CEacetate of 89 % over 16 days continuous operation. This study provides a sustainable and feasible strategy for inhibiting the photocorrosion of Ag3PO4 and thus achieve efficient acetate production from HCO3− in photo-assisted MESs biocathodes.

Kong W., Huang L., Quan X., Zhao Z., Li Puma G. (2021). Efficient production of acetate from inorganic carbon (HCO3–) in microbial electrosynthesis systems incorporating Ag3PO4/g-C3N4 anaerobic photo-assisted biocathodes. APPLIED CATALYSIS. B, ENVIRONMENTAL, 284 [10.1016/j.apcatb.2020.119696].

Efficient production of acetate from inorganic carbon (HCO3–) in microbial electrosynthesis systems incorporating Ag3PO4/g-C3N4 anaerobic photo-assisted biocathodes

Li Puma G.
2021-01-01

Abstract

The efficient production of acetate from HCO3− by the nonphotosynthetic bacterium Serratia marcescens Q1 is demonstrated in an anaerobic, photo-assisted, microbial electrosynthesis (MES) system incorporating a Ag3PO4/g-C3N4 biocathode. The Ag3PO4/g-C3N4 formed a Z-scheme photocatalytic heterojunction structure with enhanced redox capacity. The photocorrosion of Ag3PO4 was inhibited by the production of H2O2 in-situ, through water oxidation driven by the photogenerated holes on the Ag3PO4 valence band. The photoinduced electrons on the conduction band of g-C3N4 instead produced H2, which was metabolized by the Q1 electrotroph with HCO3− to produce acetate at a rate of 5.4 mM/d with a CEacetate of 93 % at a current density of 3.3 A/m2. The MES accumulated up to 81.0 mM with a CEacetate of 89 % over 16 days continuous operation. This study provides a sustainable and feasible strategy for inhibiting the photocorrosion of Ag3PO4 and thus achieve efficient acetate production from HCO3− in photo-assisted MESs biocathodes.
2021
Kong W., Huang L., Quan X., Zhao Z., Li Puma G. (2021). Efficient production of acetate from inorganic carbon (HCO3–) in microbial electrosynthesis systems incorporating Ag3PO4/g-C3N4 anaerobic photo-assisted biocathodes. APPLIED CATALYSIS. B, ENVIRONMENTAL, 284 [10.1016/j.apcatb.2020.119696].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0926337320311139-main-2-compresso.pdf

Solo gestori archvio

Tipologia: Versione Editoriale
Dimensione 1.03 MB
Formato Adobe PDF
1.03 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/638405
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 44
  • ???jsp.display-item.citation.isi??? 41
social impact