An Investigation into W or Nb or ZnFe2O4 Doped Titania Nanocomposites Deposited from Blended Powder Targets for UV/Visible Photocatalysis
Abstract
:1. Introduction
2. Experimental Section
3. Results
3.1. Coating Structures, Compositions and Deposition Rates
Sample No. | Dopant at% | Thickness nm | Dep Rate nm/min | Ra Value nm | Post-annealed Coatings | |||
---|---|---|---|---|---|---|---|---|
400 °C | 500 °C | 600 °C | 700 °C | |||||
P1 | - | 486 | 0.81 | 25 | AM | AM | AN/RU | AN/RU |
P2 | 1 at%W | 504 | 0.84 | 26 | AM | AM | AN/RU | AN/RU |
P3 | 3 at%W | 510 | 0.85 | 27 | AM | AM | AN/RU | AN/RU |
P4 | 6 at%W | 528 | 0.88 | 29 | AM | AM | AN/RU | AN/RU |
P5 | 1 at%Nb | 498 | 0.83 | 25 | AM | AM | AN/RU | AN/RU |
P6 | 3 at%Nb | 504 | 0.84 | 26 | AM | AM | AN/RU | AN/RU |
P7 | 6 at%Nb | 510 | 0.85 | 27 | AM | AM | AN/RU | AN/RU |
P8 | 1 at%ZnFe | 468 | 0.78 | 21 | AM | AM | AN/RU | AN/RU |
P9 | 3 at%ZnFe | 474 | 0.79 | 24 | AM | AM | AN/RU | AN/RU |
P10 | 6 at%ZnFe | 480 | 0.80 | 22 | AM | AM | AN/RU | RU/AN |
3.2. Assessment of Photocatalytic Activity
Sample No | Dopant at% | MeO UV rate, arbitrary units/min | Normalized MeO UV rate, arbitrary units/min/mW.cm−2 | MeO Fl rate, arbitrary units/min | Normalized MeO Fl rate, arbitrary units/min/mW.cm−2 |
---|---|---|---|---|---|
P1 | - | 0.124 | 0.031 | 0.107 | 0.017 |
P2 | 1 at%W | 0.193 | 0.048 | 0.177 | 0.028 |
P3 | 3 at%W | 0.212 | 0.053 | 0.198 | 0.031 |
P4 | 6 at%W | 0.231 | 0.058 | 0.220 | 0.034 |
P5 | 1 at%Nb | 0.188 | 0.047 | 0.153 | 0.024 |
P6 | 3 at%Nb | 0.221 | 0.055 | 0.215 | 0.034 |
P7 | 6 at%Nb | 0.216 | 0.054 | 0.211 | 0.033 |
P8 | 1 at%ZnFe2O4 | 0.159 | 0.040 | 0.117 | 0.018 |
P9 | 3 at%ZnFe2O4 | 0.143 | 0.036 | 0.125 | 0.020 |
P10 | 6 at%ZnFe2O4 | 0.097 | 0.024 | 0.054 | 0.008 |
MeO only | - | 0.013 | 0.003 | 0.010 | 0.002 |
TiO2 As-deposited | - | 0.017 | 0.004 | 0.014 | 0.002 |
4. Discussions
5. Conclusions
Conflicts of Interest
References
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Farahani, N.; Kelly, P.J.; West, G.; Ratova, M.; Hill, C.; Vishnyakov, V. An Investigation into W or Nb or ZnFe2O4 Doped Titania Nanocomposites Deposited from Blended Powder Targets for UV/Visible Photocatalysis. Coatings 2013, 3, 153-165. https://doi.org/10.3390/coatings3030153
Farahani N, Kelly PJ, West G, Ratova M, Hill C, Vishnyakov V. An Investigation into W or Nb or ZnFe2O4 Doped Titania Nanocomposites Deposited from Blended Powder Targets for UV/Visible Photocatalysis. Coatings. 2013; 3(3):153-165. https://doi.org/10.3390/coatings3030153
Chicago/Turabian StyleFarahani, Nick, Peter J. Kelly, Glen West, Marina Ratova, Claire Hill, and Vladimir Vishnyakov. 2013. "An Investigation into W or Nb or ZnFe2O4 Doped Titania Nanocomposites Deposited from Blended Powder Targets for UV/Visible Photocatalysis" Coatings 3, no. 3: 153-165. https://doi.org/10.3390/coatings3030153