Table 1.
Elemental composition and distribution of the type of oxygenic groups on the surface of GO-,Ge-OH, GO = O, GO-COOH, and GO-avg samples
|
Sample |
C/at.% |
O/at.% |
C/O |
C distribution/% |
||||
|---|---|---|---|---|---|---|---|---|
| C-C (284.5 ± 0.1 eV) | C-OH (285.4 ± 0.3 eV) | C-O-C (286.6 ± 0.2 eV) | C = O (287.6 ± 0.6 eV) | -COOH (288.7 ± 0.2 eV) | ||||
| GO |
61.4 |
38.6 |
1.6 |
44.1 |
7.5 |
27.6 |
20.7 |
|
| Ge-OH |
69.0 |
31.0 |
2.2 |
48.2 |
40.0 |
8.3 |
12.5 |
|
| GO = O |
66.8 |
33.2 |
2.0 |
50.2 |
6.6 |
|
22.8 |
|
| GO-OOH |
60.3 |
39.7 |
1.5 |
38.1 |
17.5 |
7.1 |
|
37.3 |
| GO-avg | 59.2 | 40.8 | 1.4 | 36.5 | 20.2 | 19.1 | 13.3 | 10.9 |