Improved photocatalytic degradation of ketoprofen by PtMIL-125(Ti)Ag with synergetic effect of Pt-MOF and MOF-Ag double interfaces Mechanism and degradation pathway.
It is a central issue to improve the separation efficiency of photogenerated charge carriers and the utilization of visible light in the field of photocatalysis. Herein, taking MIL-125(Ti) as a host material, the PtMIL-125(Ti) was first prepared by solvothermal method to build the interface of Schottky junction. Ag was then introduced onto the surface of PtMIL-125(Ti) to form the interface with the surface plasmon resonance effect. These double interfaces in the composite play a synergistic role on the photodagradation. The morphology, crystallinity and photochemical properties of the material were tested. By comparison, PtMIL-125(Ti)Ag (4 wt% Ag) exhibited the best performance in the photodegradation of ketoprofen (KP, 10 mgL) and the degradation process conformed to the pseudo-first-order kinetics. The photodegradation rate is 0.0253 min