A triboelectric-electromagnetic hybrid nanogenerator enhancing electrochemical oxidation for organic pollutant degradation

Abstract

The electrochemical oxidation process's efficacy in wastewater treatment is contingent upon advanced electrode materials and substantial power input. This research introduces a novel hybrid methodology that synergizes high-efficiency anodic electrochemical oxidation with the superior energy harvesting and conversion capabilities of a self-powered system. By employing anodic oxidation and subsequent electrochemical reduction, a Ti substrate was incorporated with reduced TiO₂ nanotubes (Blue-Ti) to enhance its adhesion with the doped catalytic materials. Electrodeposition of a SnO₂ interlayer and thermal coating techniques were employed to create a titanium-based copper and antimony doped tin oxide (Blue-Ti/SnO₂/Cu-ATO) electrode. This electrode exhibits remarkable electrochemical performance and excels in degrading organic pollutants. Utilizing the triboelectric-electromagnetic hybrid nanogenerator (TE-HNG), we achieved a self-sustained organic dye wastewater degradation rate of 95.5% within 1.5 hours, independent of external electricity sources. This study presents an innovative, cost-efficient strategy for wastewater treatment, integrating the modified Ti/NATO electrode with a self-powered electrochemical oxidation process.