Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation
A novel nitrogen doped carbon quantum dots (N-CQDs) mediated Ag3PO4/BiVO4 Z-scheme photocatalyst was synthesized through a solvothermal-precipitation method. The as-prepared photocatalysts were comprehensive characterized by X-ray diffraction, X-ray photo-electron spectroscopy, scanning electron mic...
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sg-ntu-dr.10356-1425502020-06-24T04:36:22Z Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation Zhang, Jin Yan, Ming Yuan, Xingzhong Si, Mengying Jiang, Longbo Wu, Zhibin Wang, Hou Zeng, Guangming School of Chemical and Biomedical Engineering Engineering::Chemical engineering BiVO4 N-CQDs A novel nitrogen doped carbon quantum dots (N-CQDs) mediated Ag3PO4/BiVO4 Z-scheme photocatalyst was synthesized through a solvothermal-precipitation method. The as-prepared photocatalysts were comprehensive characterized by X-ray diffraction, X-ray photo-electron spectroscopy, scanning electron microscopy, transmission electron micrograph, UV-vis diffuse reflection spectroscopy, vis photoluminescence and electron spin resonance analysis. The photocatalytic performances of as-prepared photocatalysts were used for degradation of tetracycline (TC) under visible-light illumination. Results exhibited the increased photocatalytic efficiency of BiVO4/N-CQDs/Ag3PO4-10 (Ag3PO4 with the mass ratio of BiVO4/N-CQDs/Ag3PO4 = 10%) to photodegrade TC is up to 88.9% in 30 min and 59.8% mineralization in 90 min. The degradation reaction coefficient (k) is about 6.00, 2.78 and 1.80 times higher than that of BiVO4, N-CQDs/BiVO4 and Ag3PO4/BiVO4, respectively. The excellent photocatalytic performance of the Z-scheme BiVO4/N-CQDs/Ag3PO4 was attributed to the construction of Z-scheme system, increased light harvesting capacity and improved molecular oxygen activation ability. Moreover, the photocatalytic activity of BiVO4/N-CQDs/Ag3PO4 remained 79.9% after five cycling runs, indicating the high stability and reusability of the as-prepared photocatalyst. Additionally, a possible photocatalytic mechanism of the novel Z-scheme BiVO4/N-CQDs/Ag3PO4 was proposed. 2020-06-24T04:36:22Z 2020-06-24T04:36:22Z 2018 Journal Article Zhang, J., Yan, M., Yuan, X., Si, M., Jiang, L., Wu, Z., . . . Zeng, G. (2018). Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation. Journal of colloid and interface science, 529, 11-22. doi:10.1016/j.jcis.2018.05.109 0021-9797 https://hdl.handle.net/10356/142550 10.1016/j.jcis.2018.05.109 29879678 2-s2.0-85047867707 529 11 22 en Journal of colloid and interface science © 2018 Elsevier Inc. All rights reserved. |
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Engineering::Chemical engineering BiVO4 N-CQDs Zhang, Jin Yan, Ming Yuan, Xingzhong Si, Mengying Jiang, Longbo Wu, Zhibin Wang, Hou Zeng, Guangming Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
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A novel nitrogen doped carbon quantum dots (N-CQDs) mediated Ag3PO4/BiVO4 Z-scheme photocatalyst was synthesized through a solvothermal-precipitation method. The as-prepared photocatalysts were comprehensive characterized by X-ray diffraction, X-ray photo-electron spectroscopy, scanning electron microscopy, transmission electron micrograph, UV-vis diffuse reflection spectroscopy, vis photoluminescence and electron spin resonance analysis. The photocatalytic performances of as-prepared photocatalysts were used for degradation of tetracycline (TC) under visible-light illumination. Results exhibited the increased photocatalytic efficiency of BiVO4/N-CQDs/Ag3PO4-10 (Ag3PO4 with the mass ratio of BiVO4/N-CQDs/Ag3PO4 = 10%) to photodegrade TC is up to 88.9% in 30 min and 59.8% mineralization in 90 min. The degradation reaction coefficient (k) is about 6.00, 2.78 and 1.80 times higher than that of BiVO4, N-CQDs/BiVO4 and Ag3PO4/BiVO4, respectively. The excellent photocatalytic performance of the Z-scheme BiVO4/N-CQDs/Ag3PO4 was attributed to the construction of Z-scheme system, increased light harvesting capacity and improved molecular oxygen activation ability. Moreover, the photocatalytic activity of BiVO4/N-CQDs/Ag3PO4 remained 79.9% after five cycling runs, indicating the high stability and reusability of the as-prepared photocatalyst. Additionally, a possible photocatalytic mechanism of the novel Z-scheme BiVO4/N-CQDs/Ag3PO4 was proposed. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Zhang, Jin Yan, Ming Yuan, Xingzhong Si, Mengying Jiang, Longbo Wu, Zhibin Wang, Hou Zeng, Guangming |
format |
Article |
author |
Zhang, Jin Yan, Ming Yuan, Xingzhong Si, Mengying Jiang, Longbo Wu, Zhibin Wang, Hou Zeng, Guangming |
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Zhang, Jin |
title |
Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
title_short |
Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
title_full |
Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
title_fullStr |
Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
title_full_unstemmed |
Nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate Z-scheme photocatalyst for enhanced antibiotic degradation |
title_sort |
nitrogen doped carbon quantum dots mediated silver phosphate/bismuth vanadate z-scheme photocatalyst for enhanced antibiotic degradation |
publishDate |
2020 |
url |
https://hdl.handle.net/10356/142550 |
_version_ |
1681058315594891264 |