Photodegradation of microcystin-LR using visible light-activated C/N-co-modified mesoporous TiO 2 photocatalyst

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dc.identifier.uri http://dx.doi.org/10.15488/10370
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/10444
dc.contributor.author Khedr, Tamer M.
dc.contributor.author El-Sheikh, Said M.
dc.contributor.author Ismail, Adel A.
dc.contributor.author Kowalska, Ewa
dc.contributor.author Bahnemann, Detlef W.
dc.date.accessioned 2021-02-04T08:11:53Z
dc.date.available 2021-02-04T08:11:53Z
dc.date.issued 2019
dc.identifier.citation Khedr, T.M.; El-Sheikh, S.M.; Ismail, A.A.; Kowalska, E.; Bahnemann, D.W.: Photodegradation of microcystin-LR using visible light-activated C/N-co-modified mesoporous TiO 2 photocatalyst. In: Materials 12 (2019), Nr. 7, 1027. DOI: https://doi.org/10.3390/ma12071027
dc.description.abstract Microcystin-LR (MC-LR), a potent hepatotoxin produced by the cyanobacteria, is of increasing concern worldwide because of severe and persistent impacts on humans and animals by inhalation and consumption of contaminated waters and food. In this work, MC-LR was removed completely from aqueous solution using visible-light-active C/N-co-modified mesoporous anatase/brookite TiO 2 photocatalyst. The co-modified TiO 2 nanoparticles were synthesized by a one-pot hydrothermal process, and then calcined at different temperatures (300, 400, and 500 °C). All the obtained TiO 2 powders were analyzed by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscope (TEM), specific surface area (SSA) measurements, ultraviolet-visible diffuse reflectance spectra (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and photoluminescence (PL) analysis. It was found that all samples contained mixed-phase TiO 2 (anatase and brookite), and the content of brookite decreased with an increase in calcination temperature, as well as the specific surface area and the content of non-metal elements. The effects of initial pH value, the TiO 2 content, and MC-LR concentration on the photocatalytic activity were also studied. It was found that the photocatalytic activity of the obtained TiO 2 photocatalysts declined with increasing temperature. The complete degradation (100%) of MC-LR (10 mg L -1 ) was observed within 3 h, using as-synthesized co-modified TiO 2 (0.4 g L -1 ) at pH 4 under visible light. Based on the obtained results, the mechanism of MC-LR degradation has been proposed. © 2019 by the authors. eng
dc.language.iso eng
dc.publisher Basel : MDPI AG
dc.relation.ispartofseries Materials 12 (2019), Nr. 7
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Anatase eng
dc.subject Brookite eng
dc.subject C/N-TiO 2 eng
dc.subject Microcystin-LR eng
dc.subject Photodegradation eng
dc.subject Visible light eng
dc.subject.ddc 600 | Technik ger
dc.title Photodegradation of microcystin-LR using visible light-activated C/N-co-modified mesoporous TiO 2 photocatalyst
dc.type article
dc.type Text
dc.relation.issn 1996-1944
dc.relation.doi https://doi.org/10.3390/ma12071027
dc.bibliographicCitation.issue 7
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 1027
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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