Table 2 Atomic percentages of O, Fe, Cl, and Zn from XPS measurements for samples prepared without NaOH (0) and with increasing NaOH concentrations: 0.35 (1), 0.70 (2), 1.40 (3) and 2.10 M (4)
From: Preparation of γ-Fe2O3/ZnFe2O4nanoparticles by enhancement of surface modification with NaOH
O | Fe | Zn | Cl | Fe:Zn:Cl | Cl:Zn | |
|---|---|---|---|---|---|---|
0 | 71.43 | 25.16 | 0.61 | 2.80 | 1:0.024: 0.111 | 1:0.22 |
1 | 72.36 | 23.69 | 1.36 | 2.59 | 1:0.057:0.109 | 1:0.52 |
2 | 69.60 | 25.05 | 2.65 | 2.70 | 1:0.108:0.106 | 1:1.02 |
3 | 68.01 | 22.89 | 5.91 | 3.19 | 1:0.258:0.139 | 1:1.86 |
4 | 68.06 | 20.90 | 7.82 | 3.22 | 1:0.374:0.154 | 1:2.43 |