Core Shell {001}-TiO2@APF Heterojunction Photocatalysts for Enhanced Water Treatment Performance.

The efficient separation and transfer of photogenerated charge carriers remain a difficult challenge in photocatalysis. While the heterojunctions are an effective strategy for promoting photogenerated charge separation, inefficient migration at the interface often hinders the development. Herein, we report a core-shell organic-inorganic hybrid system, TiO2@3-aminophenol formaldehyde resin spheres ({001}-TiO2@APF) for photocatalytic water treatment. The {001}-TiO2@APF heterojunction achieves a 100% degradation efficiency of glyphosate in 6 h with a reaction rate constant of 0.0068 min-1, which is 6.2 times that of APF (0.0011 min-1) and 1.3 times that of bare TiO2 (0.0051 min-1). XPS analysis confirms the formation of Ti-O-C covalent bonds at the organic-inorganic interface, which effectively addresses the charge transport challenge and facilitates rapid carrier migration across the heterojunction. This work underscores the importance of atomic-level interfacial engineering in constructing high-efficiency inorganic-organic photocatalysts for sustainable water purification.