Table 1 Carbon content, grain size, Raman-intensity ratio, and charge-transfer resistance of the RGO/C/ZnO, C/ZnO, and RGO/ZnO
Sample | Carbon content (wt.%) | Grain size (nm) | Raman intensity ( I D / I G ) | Charge-transfer resistance ( R ct ) (Ω cm 2 ) |
|---|---|---|---|---|
RGO/C/ZnO | 18.9 | 31.6 ± 7.9 | 0.76 | 60.8 ± 0.6 |
C/ZnO | 7.6 | 31.3 ± 7.8 | 0.72 | 273.3 ± 1.2 |
RGO/ZnO | 14.6 | 45.7 ± 17.1 | 0.83 | 99.6 ± 1.0 |