|About this Abstract
||Materials Science & Technology 2019
||Nanotechnology for Energy, Environment, Electronics, Healthcare and Industry
||Dialysate Regeneration by Efficient Urea Decomposition with TiO2 Nanowire Photoelectrochemical Cell
||Guozheng Shao, Yushi Zang, Bruce J. Hinds
|On-Site Speaker (Planned)
Over 2 million End Stage Renal Disease patients receive dialysis to sustain life. Conventional hemodialysis removes urea and other metabolic wastes by running ~120 L of dialysate in each session, which is typically 3-4 hours and 3 times a week. The intermittent character of hemodialysis results in large fluctuations in blood metabolite concentrations.
A photoelectrochemical cell with TiO2/FTO anode, 10 mM urea/0.15 M NaCl electrolyte, and 4 mg/cm2 Pt black loaded carbon paper cathode was characterized for urea decomposition efficiency. Under 4 mW/cm2 illumination using 365 nm LED with 40% quantum efficiency, the device yielded a photocurrent density of ~ 1 mA/cm2, corresponding to 40% quantum efficiency in urea decomposition per incident photon. A device with ~0.23 m2 area and a current draw of 11 A is able to decompose a daily 15 g urea production sufficient to regenerate dialysate, thus making a portable dialysis device feasible.
||Planned: At-meeting proceedings