fig2

Figure 2. (A) XRD patterns, (B) UV-vis diffuse reflectance spectra, (C) Tauc plots, (D) Mott-Schottky plots and (E) bandgap structures illustration of Zn1-xCdxS solid solutions; High-resolution XPS spectra of (F) Zn 2p, (G) Cd 3d and (H) S 2p of Zn1-xCdxS solid solutions. XRD: X-ray diffraction; UV-vis: ultraviolet-visible; XPS: X-ray photoelectron spectroscopy.