Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light
Abstract
:1. Introduction
2. Results
2.1. Relevant Physico-Chemical Properties of the Prepared Samples
2.2. AO7 Degradation Tests: Preliminary Considerations
2.3. AO7 Degradation Tests: Catalytic Behavior of the Samples in Dark Conditions
2.4. AO7 Degradation Tests under UV Irradiation
2.5. AO7 Degradation Tests under Simulated Solar Light (1 SUN)
3. Discussion
4. Materials and Methods
4.1. Materials
4.2. Methods
4.3. Catalytic Tests
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sample | Preparation | Crystallites Size (nm) | SSA (m2·g−1) a | Metal Content (wt.%) b | Surface Metal Content (wt.%) c | Metal Density (Atoms nm−2) d |
---|---|---|---|---|---|---|
MT | Soft-template synthesis | 14 ± 3 (Anatase) | 150 | - | - | - |
P25 | Commercial | 19 ± 3 (Anatase) 23 ± 4 (Rutile) | 56 | - | - | - |
Fe2.5-MTd | Direct Synthesis | 11 ± 3 (Anatase) | 147 | 2.5 | 1.33 ± 0.20 | 1.8 (0.97 c) |
IFe0.8-IT | Impregnation of P25 | 21 ± 4 (Anatase) 28 ± 2 (Rutile) | 56 | 0.80 | 1.10 ± 0.20 | 1.5 (2.1 c) |
Fe2.5-MTi | Impregnation of MT | 11 ± 1 (Anatase) | 106 | 2.6 | 2.30 ± 0.20 | 2.7 (2.4 c) |
Fe2.5-IT | Impregnation of P25 | - | 50 | 2.8 | - | 6.0 |
Sample | Initial Rate with 0.030 M H2O2 (M·s−1)∙10−8 | Final Conversion with 0.030 M H2O2 (%) | Initial Rate with 0.80 M H2O2 (M·s−1)∙10−8 | Final Conversion with 0.80 M H2O2 (%) |
---|---|---|---|---|
MT | 3.1 | 9 | 5.8 | 66 |
P25 | 2.7 | 5.2 | 1.0 | 25 |
Fe2.5-MTd | 3.1 | 27 | 4.2 | 90 |
Fe0.8-IT | 2.3 | 9.6 | 2.4 | 98 |
Fe2.5-MTi | 5.6 | 31 | 17 | 100 |
Fe2.5-IT | 2.1 | 7.8 | 1.0 | 79 |
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Freyria, F.S.; Compagnoni, M.; Ditaranto, N.; Rossetti, I.; Piumetti, M.; Ramis, G.; Bonelli, B. Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light. Catalysts 2017, 7, 213. https://doi.org/10.3390/catal7070213
Freyria FS, Compagnoni M, Ditaranto N, Rossetti I, Piumetti M, Ramis G, Bonelli B. Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light. Catalysts. 2017; 7(7):213. https://doi.org/10.3390/catal7070213
Chicago/Turabian StyleFreyria, Francesca S., Matteo Compagnoni, Nicoletta Ditaranto, Ilenia Rossetti, Marco Piumetti, Gianguido Ramis, and Barbara Bonelli. 2017. "Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light" Catalysts 7, no. 7: 213. https://doi.org/10.3390/catal7070213