Preparation, Characterization, and Activity of Y₂O₃-ZnO Complex Oxides for the Photodegradation of 2,4-Dinitrophenol

Table 2

Binding energy and the percent of valence state of O 1s in ZnO and Y₂O₃-ZnO complex oxides contained different Y₂O₃ content^a.

Y2O3 content/%	0	0.25	0.50	0.75	1.00
O^2−	530.0 (55.25)	529.9 (44.34)	529.9 (35.67)	530.0 (37.44)	530.0 (62.70)
•OH	531.1 (44.75)	531.2 (55.66)	531.0 (64.33)	531.0 (62.56)	531.6 (37.30)

aSurface concentration of different O states is in parentheses.