Table 1.
Observed cut-off and calculated optical band gap values (Eg) of the obtained gels.
| Gels Composition, mol % | UV-Vis Results | |
|---|---|---|
| Eg, eV | Cut-Off, nm | |
| TiO2 (Ti(IV) isopropoxide) | 3.37 | 367.69 |
| TS (2% Sm) | 2.90 | 431.98 |
| TN (2% Nd) | 2.61 | 474.24 |
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