Hydrolysis-Controlled Condensation Synthesis of Co_0.5Mn_0.5TiO₃ Nanosheet Catalysts Toward Advanced Oxidation...

Advanced oxidation processes (AOPs) have been regarded as the most promising technology for organic pollutant degradation and industrial wastewater treatment. However, the lack of heterogeneous catalysts with both high activity and stability have long hindered the development of AOPs. Herein, a hydrolysis-controlled condensation method was put forward to fabricate a Co_0.5Mn_0.5TiO₃ nanosheet catalyst, which realized both active and stable AOPs. Such anti-agglomeration nanosheet material showed a specific surface area (15.5 m² g^-1), and achieved complete degradation of refractory organic compounds such as rhodamine B within 8 min with a kinetic constant of 0.649 min^-1, significantly outperformed the commercial Co₃O₄ catalysts (only 0.122 min^-1). Moreover, the degradation efficiency remained >98 % after seven continuous catalysis cycles. The quenching experiment combined with first-principles calculation indicated that Co sites on the nanosheet catalyst effectively oxidized peroxymonosulfate to generate ¹O₂ active species, thus achieving high-efficient AOPs.