Development of sol-gel based Ti4O7 electrodes for electrochemical water oxidation: the influence of anode configuration on the performance and long term stability of the treatment.

01 October 2020 → Ongoing
Regional and community funding: Special Research Fund
Research disciplines
  • Natural sciences
    • Electrochemistry
    • Inorganic green chemistry
  • Engineering and technology
    • (Waste)water treatment processes
    • Destructive and non-destructive testing of materials
    • Materials synthesis
(Waste)water treatment sol-gel synthesis electrochemistry
Project description

This research project, involving materials synthesis and electrochemical water treatments, will address a key limiting point for long term running of efficient electrochemical oxidation of contaminated water: the anodes. Research tasks will include: 1) the development of electrodes based on sol-gel materials with high surface area/controlled porosity; 2) the electrochemical performance of the electrodes on the oxidation of Per- and polyfluoroalkyl substances (PFASs) and As; and 3) the determination of the life-service of the anodes. First, the research will provide fundamental guidelines to the design of sol-gel TiO2 films, monolithic and nanoparticle products. The conversion from TiO2 to Ti4O7 without morphological alterations will be the first challenge addressed. A new anode configuration will be explored: composite coating (Ti4O7 nanoparticles embedded in Pani matrix) on porous additive manufactured Ti substrates. Next, the electrochemical activities of the anodes presenting variable configurations will be sensed using cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The electrochemical oxidation of As and PFAS will be validated in actual reactor systems. Finally, the long-life stability of the electrodes will be determined and erosion-corrosion tests will be introduced to the field. The successful completion of this project will have numerous benefits to the electrochemical water treatment fields and also to electrode materials in general.