(a–c) TEM (left) and SEM (right) images imply the morphology of the Cu exchanged ZnS nanosheets, nanobelts, and nanorods, respectively. HRTEM images (d,e) and FFT pattern (f) of a Cu-exchanged ZnS nanorod. In these images (d and e), the yellow marks and lines represent the stacking faults and planar defects, respectively. In addition, the red lines (e) and arrows (f) mark the lattice orientations and defects, respectively. (g) RhB removal efficiency of the Cu-exchanged ZnS nano-adsorbents in different morphologies varies depending on the adsorbent concentration. Reproduced with permission [127]. Copyright 2017, Elsevier.