Table 2 Elemental composition and distribution of the type of nitrogen-containing groups on the surface of GO-U, Ge-OH-U, GO = O-U, GO-COOH-U, and GO-avg-U samples
From: Designed nitrogen doping of few-layer graphene functionalized by selective oxygenic groups
Sample | C/at.% | N/at.% | N/C/% | N distribution/at.% | |||
|---|---|---|---|---|---|---|---|
N-6 (398.5 ± 0.3 eV) | N-5 (400 ± 0.2 eV) | N-Q (401.5 ± 0.3 eV) | N-X (404.4 ± 0.3 eV) | ||||
GO-U | 77.7 | 9.5 | 12.2 | 2.6 | 5.1 | 1.5 | 0.2 |
Ge-OH-U | 77.9 | 3.0 | 3.9 | 2.1 | 0.8 | 0.1 | |
GO = O-U | 74.3 | 4.2 | 5.7 | 1.1 | 2.8 | 0.3 | |
GO-OOH-U | 82.4 | 8.4 | 10.2 | 1.2 | 5.3 | 1.4 | |
GO-avg-U | 78.9 | 6.1 | 7.7 | 2.0 | 2.0 | 1.6 | 0.5 |