fig11

Figure 11. (A) TEM and (B) HAADF-STEM with mapping images of ZnS/ZnO-0.5 h; (C and D) HRTEM images at site 1 and site 2 from (A); inset in (A) shows nanoparticle size distribution. (E) XRD patterns of ZnS(en)_0.5 calcined at 500 °C for 5 min, 10 min, 0.5 h, 1 h, 3 h, and 5 h. XPS spectra: (F) Zn 2p; (G) S 2p; (H) O 1s; and (I) N 1s. ZnS/ZnO-0.5 h denotes the 0.5 h calcined sample; (J) Time-dependent H₂ evolution activity and; (K) average H₂ evolution rates of the samples. Copyright 2022, MDPI^[24]. TEM: Transmission electron microscopy; HAADF-STEM: high-angle annular dark-field scanning transmission electron microscopy; ZnS: Zinc sulfide; HRTEM: high-resolution transmission electron microscopy; XRD: X-ray diffraction.