Nb/N Co-Doped Layered Perovskite Sr2TiO4: Preparation and Enhanced Photocatalytic Degradation Tetracycline under Visible Light
Abstract
:1. Introduction
2. Results and Discussion
2.1. Materials Characterization
2.2. Photoelectrochemical Properties of Sr2TiO4:N,Nb
2.3. Photocatalytic Degradation of TC
2.4. Improvement Mechanism of Photocatalytic Performance
3. Materials and Methods
3.1. Chemicals
3.2. Materials Synthesis
3.2.1. Synthesis of Sr2TiO4
3.2.2. Synthesis of N-Doped Sr2TiO4
3.2.3. Synthesis of Nb/N Co-Doped Sr2TiO4
3.3. Characterization
3.4. Photoelectrochemical Measurements
3.5. Photocatalytic Degradation of TC
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Doping Elements | A-Site/B-Site or O-Site Doping | Doping Content | Eg (eV) | References |
---|---|---|---|---|
Cr | B | 5 at% | ~1.5 | [15] |
Ag | A | 2.5 at% | 3.05 | [16] |
F | O | 3 at% | 3.20 | [17] |
Chalcogens (S, Se, Te) | O | -- | 0~2.99 | [18] |
La/N | A/O | 10 at%/- | 2.2 | [13] |
Cr/F | B/O | 5 at%/40 at % | ~2.5 | [19] |
La/Rh | A/B | 1.5 at%/3 at % | 2.43 | [20] |
La/Fe | A/B | 1.5 at%/3 at % | ~2.75 | [12] |
Sr2TiO4 | Sr2TiO4:N | Sr2TiO4:N,Nb(1%) | Sr2TiO4:N,Nb(2%) | Sr2TiO4:N,Nb(3%) | Sr2TiO4:N,Nb(4%) | Sr2TiO4:N,Nb(5%) | |
---|---|---|---|---|---|---|---|
Average crystallite size | 43 nm | 65 nm | 64 nm | 55 nm | 68 nm | 71 nm | 61 nm |
Samples | Doping Elements | Organic Pollutants | Degradation Rates | Irradiation System | References |
---|---|---|---|---|---|
Sr2TiO4 | —— | methylene orange | 32% (120 min) | UV lamp (400 W Osram lamps) | [36] |
Sr2TiO4 | —— | methylene orange | 3.2% (180 min) | Xenon lamp (300 W without filter) | [37] |
Sr2TiO4 | —— | methylene orange | 78% (120 min) | UV lamp (λ = 253.7 nm, 2200 mW·cm−2) | [38] |
Sr2TiO4 | La | methylene orange | 90.5% (120 min) | UV lamp (λ = 253.7 nm, 2200 mW·cm−2) | [38] |
Sr2TiO4 | —— | tetracycline | 40% (60 min) | LED lamp (λ > 420 nm) | This work |
Sr2TiO4 | Nb/N | tetracycline | 99% (60 min) | LED lamp (λ > 420 nm) | This work |
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Wang, J.; Li, P.; Zhao, Y.; Zeng, X. Nb/N Co-Doped Layered Perovskite Sr2TiO4: Preparation and Enhanced Photocatalytic Degradation Tetracycline under Visible Light. Int. J. Mol. Sci. 2022, 23, 10927. https://doi.org/10.3390/ijms231810927
Wang J, Li P, Zhao Y, Zeng X. Nb/N Co-Doped Layered Perovskite Sr2TiO4: Preparation and Enhanced Photocatalytic Degradation Tetracycline under Visible Light. International Journal of Molecular Sciences. 2022; 23(18):10927. https://doi.org/10.3390/ijms231810927
Chicago/Turabian StyleWang, Jiansheng, Pengwei Li, Yingna Zhao, and Xiongfeng Zeng. 2022. "Nb/N Co-Doped Layered Perovskite Sr2TiO4: Preparation and Enhanced Photocatalytic Degradation Tetracycline under Visible Light" International Journal of Molecular Sciences 23, no. 18: 10927. https://doi.org/10.3390/ijms231810927