fig5
Figure 5. (A) UV-vis DRS; (B) Tauc plot; (C) photocurrent and (D) VB-XPS of g-C3N4 carriers and supported Au catalysts; (E) Schematic diagram of the band structure of the Au/CN(I), Au/CN(II), and Au/CN(III) catalysts. XPS: X-ray photoelectron spectroscopy.
