Ferroelectric LiTaO<inf>3</inf> as novel photo-electrocatalyst in microbial fuel cells

  • Abdellah Benzaouak /
  • Nour Eddine Touach /
  • Víctor Manuel Ortiz-Martínez /
  • María José Salar-García /
  • Francisco José Hernández-Fernández /
  • Antonia Pérez De Los Ríos /
  • Mohammad El Mahi /
  • El Mostapha Lotfi
Journal ar
Environmental Progress and Sustainable Energy
  • Volumen: 36
  • Número: 5
  • Fecha: 01 September 2017
  • Páginas: 1568-1574
  • ISSN: 19447450 19447442
  • Source Type: Journal
  • DOI: 10.1002/ep.12609
  • Document Type: Article
  • Publisher: John Wiley and Sons Inc.
© 2017 American Institute of Chemical Engineers Environ Prog Microbial fuel cells (MFCs) are a promising technology for simultaneous electricity generation and wastewater treatment. Noble materials can offer high catalyst performance in MFCs but their high cost poses an obstacle for the practical implementation of this technology. Ferroelectric materials such as LiTaO3 are a new generation of photocatalysts that could potentially be used for the oxygen reduction reaction in these devices. Thus, this work investigates the performance of LiTaO3 as cathode catalyst in MFCs for the first time. The power performance of carbon cloth cathodes coated with LiTaO3 was assessed in the presence and absence of light irradiation in MFC systems using wastewater. Prior to be tested in MFCs, the synthesized phase of LiTaO3 was mainly characterized by XRD, particle-size distribution, TEM, and UV¿vis spectroscopy analyses. The results show that the performance of the cathode coated with LiTaO3 significantly improves under UV¿vis irradiation, with a threefold increase in maximum power density compared with the results obtained in the absence of light source. Under these conditions, COD removal from wastewater reached 66% after 120 h. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1568¿1574, 2017.

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