dc.identifier.uri |
http://dx.doi.org/10.15488/9815 |
|
dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/9872 |
|
dc.contributor.author |
Khedr, Tamer M.
|
|
dc.contributor.author |
El-Sheikh, Said M.
|
|
dc.contributor.author |
Abdeldayem, Hany M.
|
|
dc.contributor.author |
Ismail, Adel A.
|
|
dc.contributor.author |
Kowalska, Ewa
|
|
dc.contributor.author |
Bahnemann, Detlef W.
|
|
dc.date.accessioned |
2020-05-18T09:16:26Z |
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dc.date.available |
2020-05-18T09:16:26Z |
|
dc.date.issued |
2019 |
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dc.identifier.citation |
Khedr, Tamer M.; El-Sheikh, S.M.; Abdeldayem, H.M.; Ismail, A.A.; Kowalska, E. et al.: A comparative study of microcystin-LR degradation by UV-a, solar and visible light irradiation using bare and C/N/S-modified titania. In: Catalysts 9 (2019), Nr. 11, 877. DOI: https://doi.org/10.3390/catal9110877 |
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dc.description.abstract |
In an endeavor to tackle environmental problems, the photodegradation of microcystin- LR (MC-LR), one of the most common and toxic cyanotoxins, produced by the cyanobacteria blooms, was examined using nanostructured TiO2 photocatalysts (anatase, brookite, anatase- brookite, and C/N/S co-modified anatase-brookite) under UV-A, solar and visible light irradiation. The tailoring of TiO2 properties to hinder the electron-hole recombination and improve MC-LR adsorption on TiO2 surface was achieved by altering the preparation pH value. The highest photocatalytic efficiency was 97% and 99% with degradation rate of 0.002 mmol L-1 min-1 and 0.0007 mmol L-1 min-1 under UV and solar irradiation, respectively, using a bare TiO2 photocatalyst prepared at pH 10 with anatase to brookite ratio of ca. 1:2.5. However, the bare TiO2 samples were hardly active under visible light irradiation (<25%) due to a large band gap. Upon UV, solar and vis irradiation, the complete MC-LR degradation (100%) was obtained in the presence of C/N/S comodified TiO2 with a degradation rate constant of 0.26 min-1, 0.11 min-1 and 0.04 min-1, respectively. It was proposed that the remarkable activity of co-modified TiO2 might originate from its mixedphase composition, mesoporous structure, and non-metal co-modification. |
eng |
dc.language.iso |
eng |
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dc.publisher |
Basel : MDPI AG |
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dc.relation.ispartofseries |
Catalysts 9 (2019), Nr. 11 |
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dc.rights |
CC BY 4.0 Unported |
|
dc.rights.uri |
https://creativecommons.org/licenses/by/4.0/ |
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dc.subject |
Anatase/brookite |
eng |
dc.subject |
Cyanotoxins |
eng |
dc.subject |
Emerging pollutants |
eng |
dc.subject |
Microcystin-LR |
eng |
dc.subject |
Non-metal co-modification |
eng |
dc.subject |
Photodecomposition |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.title |
A comparative study of microcystin-LR degradation by UV-a, solar and visible light irradiation using bare and C/N/S-modified titania |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.issn |
2073-4344 |
|
dc.relation.doi |
https://doi.org/10.3390/catal9110877 |
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dc.bibliographicCitation.issue |
11 |
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dc.bibliographicCitation.volume |
9 |
|
dc.bibliographicCitation.firstPage |
877 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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