Table 4. Contribution of Mn2+ and Mn3+ in the XANES signal collected at the Mn K-edge extracted from LCF analysis, and the corresponding sample formula.
| Group (x) | Mn2+ (%) | (Mn2+ & Mn3+) (%) | Mn2+ % | Mn3+ (%) |
†
|
|---|---|---|---|---|---|
| 0.03 | 89.4 ± 5.0 | 10.6 ± 0.8 | 91.7 ± 4.3 | 8.3 ± 1.4 |
|
| 0.05 | 86.4 ± 5.0 | 13.6 ± 1.1 | 88.4 ± 4.2 | 11.6 ± 1.9 |
|
| 0.07 | 86.6 ± 5.0 | 13.4 ± 1.1 | 88.4 ± 4.3 | 11.6 ± 1.9 |
|
| 0.03R‡ | 94.4 ± 5.5 | 5.6 ± 0.4 | 96.6 ± 4.7 | 3.4 ± 0.5 |
|
| 0.05R‡ | 87.5 (5.7) | 12.5 ± 0.9 | 89.6 ± 4.3 | 10.4 ± 1.7 |
|
| 0.07R‡ | 90.9 ± 5.2 | 9.1 ± 0.7 | 91.8 ± 4.4 | 8.2 ± 1.4 |
|
†
The
symbol represents the Zn vacancies equals to the amount % of Mn3O4 impurity phase.
‡
R is the γ-irradiated sample.