In contrast, 10-second irradiation intervals resulted in a decrease in the overall deF% to 32%, even though the solution temperature was 300 K. As the interval increased to 1 min, the overall deF% further decreased to 11% at 298 K, whereas the overall deF% maintained at 296 K with a 2-min interval. These observations indicate the involvement of another chemical reaction occurring on timescales of seconds to tens of seconds in PFOS decomposition. Moreover, the observed adsorption of displaced ligands, requiring several seconds to tens of seconds, and the slope of excitation dependence exceeding 2 highlight the significance of light-induced ligand desorption/adsorption reactions in PFOS decomposition. Once a ligand is desorbed, PFOS can coordinate with the NC surface, facilitating its efficient degradation. These results collectively suggest that the interplay between ligand desorption, PFOS adsorption, and nonlinear photoreaction processes plays a pivotal role in the efficient decomposition of PFOS under visible light (Fig. ).