fig2
Figure 2. (A) SEM image and (B) HRTEM image of VZn-ZIS; (C) SEM image of UCNPs; (D) SEM, (E) TEM image, (F) HRTEM image and (G) SEM element mapping images of UCNPs@VZn-ZIS. SEM: Scanning electron microscopy; HRTEM: high-resolution transmission electron microscopy; VZn-ZIS: Zn vacancy-rich ZnIn2S4; UCNPs: up-conversion nanoparticles; TEM: transmission electron microscopy.
