Defect-mediated enhancement of TiO2 photoanodes with potassium-poly(heptazine imide) for enhanced solar-driven biomass oxidation and synergistic degradation of organophosphorus pesticides

Key Points

• This research aims to improve the efficiency of TiO2 photoanodes through defect mediation and potassium poly(heptazine imide) modification.
• Developed a potassium-modified carbon nitride photoanode.
• Measured photocurrents reaching up to 5 mA cm−2 and stability over 2 hours during methanol oxidation.
• Screened various percentages to find the optimal proportion of potassium-poly(heptazine imide).
• Achieved a photocurrent of 5 mA cm−2 during methanol oxidation.
• Demonstrated 2 hours of stability in photocurrent generation.
• Observed a catalytic increment of 8.94 × 10^7 for pesticide degradation.