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Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers
Fibrous Ti/Ce oxide photocatalysts were prepared for the first time by a biomimetic solution process using short flax fibers (flax straw processing waste) as a biotemplate. Titanium polyhydroxy complex solutions with 3% and 5% cerium were used as precursors. Flax fibers were impregnated in an autocl...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8199952/ https://www.ncbi.nlm.nih.gov/pubmed/34205177 http://dx.doi.org/10.3390/molecules26113399 |
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author | Butman, Mikhail F. Kochkina, Nataliya E. Ovchinnikov, Nikolay L. Krämer, Karl W. |
author_facet | Butman, Mikhail F. Kochkina, Nataliya E. Ovchinnikov, Nikolay L. Krämer, Karl W. |
author_sort | Butman, Mikhail F. |
collection | PubMed |
description | Fibrous Ti/Ce oxide photocatalysts were prepared for the first time by a biomimetic solution process using short flax fibers (flax straw processing waste) as a biotemplate. Titanium polyhydroxy complex solutions with 3% and 5% cerium were used as precursors. Flax fibers were impregnated in an autoclave under hydrothermal conditions. Ti/Ce oxides were obtained from the biotemplate by annealing at 600 °C. The photocatalytic activity of the Ti/Ce oxides was studied by the adsorption and decomposition of the dye rhodamine B under UV irradiation. The photocatalytic decomposition of the dye was 50% and 75% faster for Ti/Ce oxides with 3% and 5% Ce, respectively, than for the analogous undoped fibrous TiO(2). The morphologies, textures, and structures of the photocatalysts were studied by scanning electron microscopy, low temperature N(2) adsorption/desorption, UV-Vis spectroscopy, and X-ray and XPS analytical methods. It was shown that the introduction of Ce into the precursor solution increased the surface irregularity of the Ti/Ce oxide crystallites compared to pure TiO(2). This effect scaled with the Ce concentration. Ce improved the UV light absorption of the material. The Ti/Ce oxides contained Ce(4+)/Ce(3+) pairs that played an important role in redox processes and intensified the photocatalytic activity. |
format | Online Article Text |
id | pubmed-8199952 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81999522021-06-14 Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers Butman, Mikhail F. Kochkina, Nataliya E. Ovchinnikov, Nikolay L. Krämer, Karl W. Molecules Article Fibrous Ti/Ce oxide photocatalysts were prepared for the first time by a biomimetic solution process using short flax fibers (flax straw processing waste) as a biotemplate. Titanium polyhydroxy complex solutions with 3% and 5% cerium were used as precursors. Flax fibers were impregnated in an autoclave under hydrothermal conditions. Ti/Ce oxides were obtained from the biotemplate by annealing at 600 °C. The photocatalytic activity of the Ti/Ce oxides was studied by the adsorption and decomposition of the dye rhodamine B under UV irradiation. The photocatalytic decomposition of the dye was 50% and 75% faster for Ti/Ce oxides with 3% and 5% Ce, respectively, than for the analogous undoped fibrous TiO(2). The morphologies, textures, and structures of the photocatalysts were studied by scanning electron microscopy, low temperature N(2) adsorption/desorption, UV-Vis spectroscopy, and X-ray and XPS analytical methods. It was shown that the introduction of Ce into the precursor solution increased the surface irregularity of the Ti/Ce oxide crystallites compared to pure TiO(2). This effect scaled with the Ce concentration. Ce improved the UV light absorption of the material. The Ti/Ce oxides contained Ce(4+)/Ce(3+) pairs that played an important role in redox processes and intensified the photocatalytic activity. MDPI 2021-06-03 /pmc/articles/PMC8199952/ /pubmed/34205177 http://dx.doi.org/10.3390/molecules26113399 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Butman, Mikhail F. Kochkina, Nataliya E. Ovchinnikov, Nikolay L. Krämer, Karl W. Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title | Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title_full | Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title_fullStr | Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title_full_unstemmed | Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title_short | Photocatalytic Activity of Fibrous Ti/Ce Oxides Obtained by Hydrothermal Impregnation of Short Flax Fibers |
title_sort | photocatalytic activity of fibrous ti/ce oxides obtained by hydrothermal impregnation of short flax fibers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8199952/ https://www.ncbi.nlm.nih.gov/pubmed/34205177 http://dx.doi.org/10.3390/molecules26113399 |
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