Consideration of Photoactivity of TiO2 Pigments via the Photodegration of Methyl Orange under UV Irradiation
Abstract
:1. Introduction
2. Experiments
2.1. Materials
2.2. TiO2 Pigment Characterization
2.3. Photoactivity Tests
2.4. Theoretical Calculations
3. Results and Discussions
3.1. TiO2 Pigment Characterization
3.2. Photoactivity Tests
3.3. Photodegradation Mechanism
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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TiO2 Pigment Sample | Composition | Surface Treatment | Applications |
---|---|---|---|
P1 | TiO2 (anatase, >98%) | SiO2/Al2O3 | Paints, fiber, rubber, metallurgy, etc. |
P2 | TiO2 (rutile, >98%) | None | - |
P3 | TiO2 (rutile, >92%) | SiO2/Al2O3 | Coatings, rubber, plastic, etc. |
Atom Label | Point Charges | Bond | Bond Length (Å) |
---|---|---|---|
C1 | 0.239 | C1–C2 | 1.4419 |
C2 | −0.886 | C2–C3 | 1.4369 |
C3 | 0.070 | C3–C4 | 1.3639 |
C4 | −0.070 | C4–C5 | 1.4419 |
C5 | 0.402 | C5–C6 | 1.4471 |
C6 | −0.138 | C6–C1 | 1.3618 |
N7 | 0.055 | N7–C2 | 1.3356 |
N8 | −0.088 | N7–N8 | 1.3267 |
C9 | −0.214 | C9–C10 | 1.4593 |
C10 | −0.637 | C10–C11 | 1.4613 |
C11 | 0.066 | O11–C12 | 1.3543 |
C12 | 0.550 | O12–C13 | 1.4505 |
C13 | −0.776 | C13–C14 | 1.4455 |
C14 | 0.060 | C14–C9 | 1.3552 |
S15 | 1.341 | S15–C10 | 1.8431 |
N16 | −0.079 | N16–C5 | 1.3401 |
C17 | −0.285 | N16–C17 | 1.4735 |
C18 | −0.276 | N16–C18 | 1.4737 |
O19 | −0.467 | S15–O19 | 1.4557 |
O20 | −0.465 | S15–O20 | 1.4558 |
O21 | −0.320 | S15–O21 | 1.6345 |
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Zhou, S.; Bai, J.; Huang, K.; Ye, X.; Peng, Y.; Lei, M. Consideration of Photoactivity of TiO2 Pigments via the Photodegration of Methyl Orange under UV Irradiation. Materials 2022, 15, 6044. https://doi.org/10.3390/ma15176044
Zhou S, Bai J, Huang K, Ye X, Peng Y, Lei M. Consideration of Photoactivity of TiO2 Pigments via the Photodegration of Methyl Orange under UV Irradiation. Materials. 2022; 15(17):6044. https://doi.org/10.3390/ma15176044
Chicago/Turabian StyleZhou, Shuolin, Junzhuo Bai, Keying Huang, Xinlu Ye, Yingqing Peng, and Min Lei. 2022. "Consideration of Photoactivity of TiO2 Pigments via the Photodegration of Methyl Orange under UV Irradiation" Materials 15, no. 17: 6044. https://doi.org/10.3390/ma15176044