Figure 2.

H₂S release and sonodynamic performance of PEG–TiS _X NSs. a) Schematic illustration of H₂S release and sonodynamic properties of PEG–TiS _X NSs. b–d) H₂S release performance of PEG–TiS _X NSs with different concentrations using b) lead acetate test paper, c) TMB, and d) MB as the indicators, respectively. e) H₂S release property of PEG–TiS _X NSs with different concentrations using WSP‐1 probe. f) The fluorescence imaging of PEG–TiS _X NSs with different concentrations using H₂S probe at different time points. g) UV–vis–NIR spectra of PEG–TiS _X NSs with different degradation times. h) XPS spectrum of Ti 2p of D‐TiS _X NSs. i) Raman spectrum of D‐TiS _X NSs. j) ESR spectra demonstrating the sulfur vacancies of TiS _X and D‐TiS _X NSs. k) ROS generation ability of PEG–TiS _X NSs after degradation for 12 h. l) Comparison of sonodynamic performance of PEG–TiS _X NSs with different degradation times and commercial TiO₂. m) ESR spectra exhibiting ¹O₂ generation by H₂O and PEG–TiS _X NSs with different degradation times under US irradiation. n) The schematic mechanism of TiS _X NSs for sonodynamic property.