pH

O (atom %)

W (atom %)

Cu (atom %)

Surface Area (m²/g)

3

70.3

20.66

14.65

18.165

5

71.97

11.38

16.65

68.274

7

68.19

14.22

17.59

59.517

9

30.49

16.13

38.07

31.494