Sunday, 1 October 2017: 17:10
Maryland 2 (Gaylord National Resort and Convention Center)
Bipolar electrodes based on titanium dioxide are configured for water purification. The TiO2 photo-anode oxidizes organic pollutants. Concomitant with photooxidation, oxygen is reduced at the dark cathode to yield hydrogen peroxide which serves as a bio-disinfectant. The device uses a very low cost semiconductor material (titanium dioxide with no sensitizer) and requires only low technology fabrication methods. The photoanode is prepared by arc-anodization of titanium foil. The dark cathode is prepared from hydrophilic carbon gas diffusion material typically used in fuel cells. The cell design and bio-disinfectant efficiency will be discussed.