Improved Visible Light Photocatalytic Activity for TiO₂ Nanomaterials by Codoping with Zinc and Sulfur

Figure 3

The XPS core level binding energy in SZT-3. (a) An overview XPS spectrum of the sample; (b) Ti 2p spectrum; (c) Zn 2p spectrum; and (d) S 2p spectrum.

(a)

(b)

(c)

(d)