Photocatalytic Decolorization of Dye with Self-Dye-Sensitization under Fluorescent Light Irradiation
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Characterization of Photocatalyst
2.3. Evaluation of Photocatalytic Activity
3. Results and Discussion
3.1. UV–Visible Analysis
3.2. Photocatalytic Decolorization of OII and MO with TiO2
3.3. Photocatalytic Decolorization of OII and MO with ZnO
3.4. Kinetic Analysis
3.5. Proposed Degradation Mechanisms
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Samples | Orange II (5 mg/L,30 mL) Methyl orange (5 mg/L, 30 mL) |
Photocatalyst | P25 TiO2 (20 mg) Aldrich ZnO (20 mg) |
Temperature | Room temperature (25 °C) |
pH | 6 |
Light source | 450 nm LED light (5.14 mW/cm2) Fluorescent light (0.034 mW/cm2) |
λmax | Orange II (485 nm), methyl orange (464 nm) |
Irradiation time | 6 h |
Light Source | Catalysts | kobs (min−1) | R2 | t1/2 (min) | |||
---|---|---|---|---|---|---|---|
OII | MO | OII | MO | OII | MO | ||
Fluorescent light | TiO2 | 0.0019 | 0.00067 | 0.80 | 0.97 | 367 | 1029 |
ZnO | 0.0019 | 0.00083 | 0.93 | 0.96 | 346 | 866 | |
LED light | TiO2 | 0.0055 | 0.0013 | 0.97 | 0.98 | 125 | 525 |
ZnO | 0.0013 | 0.00023 | 0.88 | 0.88 | 533 | 3465 |
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Molla, M.A.I.; Tateishi, I.; Furukawa, M.; Katsumata, H.; Suzuki, T.; Kaneco, S. Photocatalytic Decolorization of Dye with Self-Dye-Sensitization under Fluorescent Light Irradiation. ChemEngineering 2017, 1, 8. https://doi.org/10.3390/chemengineering1020008
Molla MAI, Tateishi I, Furukawa M, Katsumata H, Suzuki T, Kaneco S. Photocatalytic Decolorization of Dye with Self-Dye-Sensitization under Fluorescent Light Irradiation. ChemEngineering. 2017; 1(2):8. https://doi.org/10.3390/chemengineering1020008
Chicago/Turabian StyleMolla, Md. Ashraful Islam, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Tohru Suzuki, and Satoshi Kaneco. 2017. "Photocatalytic Decolorization of Dye with Self-Dye-Sensitization under Fluorescent Light Irradiation" ChemEngineering 1, no. 2: 8. https://doi.org/10.3390/chemengineering1020008