Peroxymonosulfate (PMS) activation on cobalt-doped TiO2 nanotubes: degradation of organics under dark and solar light irradiation conditions†
Peroxymonosulfate activation on cobalt-doped TiO2 nanotubes (Co-TNTs) as applied for the degradation of organic pollutants in the absence of light and under solar light irradiation is investigated. Co-TNTs generate SO4˙−via PMS activation in the dark, while they result in SO4˙− formation via PMS activation and, at the same time, produce ˙OH via photocatalytic water oxidation under simulated solar light illumination. Radical generation is explored using electron paramagnetic resonance (EPR) spectroscopy. The catalytic activity is maintained over multiple catalytic cycles with negligible Co(II) leaching. The nanotube catalysts are easily recovered without loss of activity after water treatment. The Co-TNT/PMS reaction system can be used for wastewater treatment during the day and at night.
- This article is part of the themed collection: Environmental Remediation