fig2

Figure 2. (A) XRD patterns and (B) UV-vis spectra of as-prepared CdS, MN and CdS/MN composite; (C) XPS spectra of Cd 3d orbitals of CdS and CdS/MN; (D) XPS VB spectrum of MN. XRD: X-ray diffraction; UV-vis: ultraviolet-visible; CdS/MN: cadmium sulfide/molybdenum nitride; XPS: X-ray photoelectron spectra; VB: valence band.