Preparation and Electrocatalytic Performance of Bi-Modified Quartz Column Particle Electrode for Phenol Degradation

Figure 5

X-ray photoelectron spectra of 550-4: (a) XPS spectrum; (b) Bi4f spectra; (c) Si2p spectra; (d) O1s spectra.

(a)

(b)

(c)

(d)