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Band gap values of Fe oxide/Fe hydroxide (FeO6), GO oxide (GO6), and hybrid Fe oxide/Fe hydroxide/N-rGO, FeO6/GO4, FeO6/GO6, and FeO6/GO8 layers calculated from the slope of the [F(R)hυ]2 function versus incident photon energy, hυ.
| Samples | Band gap [eV] |
|---|---|
| FeO6 | 2.67 |
| GO6 | 1.69–2.24 |
| FeO6/GO4 | 1.68–2.98 |
| FeO6/GO6 | 1.73–2.89 |
| FeO6/GO8 | 1.57–2.79 |
