Research Article
One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation
Table 1
Rate constants (
) of
γ-Fe
2O
3 prepared under different conditions for Orange I photodegradation.
| γ-Fe2O3 prepared under different conditions | Rate constants (k) (×10−3 min−1) | Relative coefficient () |
| Different pH values at 60°C for 6 h | | | pH 6.0 | 4.1 | 0.948 | pH 7.0 | 3.5 | 0.919 | pH 8.0 | 3.2 | 0.942 | pH 9.1 | 2.9 | 0.959 | pH 10.1 | 2.6 | 0.970 | pH 12.1 | 2.2 | 0.962 |
| Different reaction temperature at pH 6.0 for 6 h | | | 60°C | 4.1 | 0.948 | 70°C | 3.9 | 0.959 | 80°C | 3.7 | 0.959 | 90°C | 3.4 | 0.971 |
| Different reaction time at 60°C and pH 6.0 | | | 6 h | 4.1 | 0.948 | 10 h | 3.1 | 0.951 | 16 h | 2.6 | 0.981 |
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