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The behavior of ozone on different iron oxides surface sites in water
A transformation process of ozone on different iron oxides suspensions, including α-Fe(2)O(3), α-FeOOH, Fe(3)O(4), was carried out using FTIR of adsorbed pyridine, ATR-FTIR and electron paramagnetic resonance (EPR) spectra with isotope (18)O(3). It was verified that on the surface isolated hydroxyl...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6791862/ https://www.ncbi.nlm.nih.gov/pubmed/31611622 http://dx.doi.org/10.1038/s41598-019-50910-w |
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author | Yan, Liqiang Bing, Jishuai Wu, Hecheng |
author_facet | Yan, Liqiang Bing, Jishuai Wu, Hecheng |
author_sort | Yan, Liqiang |
collection | PubMed |
description | A transformation process of ozone on different iron oxides suspensions, including α-Fe(2)O(3), α-FeOOH, Fe(3)O(4), was carried out using FTIR of adsorbed pyridine, ATR-FTIR and electron paramagnetic resonance (EPR) spectra with isotope (18)O(3). It was verified that on the surface isolated hydroxyl groups and the surface hydroxyl groups without acid sites of these iron oxides, ozone was electrostatically adsorbed and did not interact with the surface of these oxides, stably existed as ozone molecule. In contrast, ozone could replace the surface hydroxyl groups on Lewis acid sites of oxides, and directly interacted with the surface metal ions, decomposing into reactive oxygen species (ROS) and initiating the surface metal redox. The results indicate that Lewis acid sites were active center while the electronic cycle of the Fe(2+)/Fe(3+) is advantageous to promote ozone decomposition into O(2)(•−) and (•)OH radicals. The mechanism of catalytic ozonation in different surface acid sites of iron oxides aqueous suspension was proposed on the basis of all experimental information. |
format | Online Article Text |
id | pubmed-6791862 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67918622019-10-21 The behavior of ozone on different iron oxides surface sites in water Yan, Liqiang Bing, Jishuai Wu, Hecheng Sci Rep Article A transformation process of ozone on different iron oxides suspensions, including α-Fe(2)O(3), α-FeOOH, Fe(3)O(4), was carried out using FTIR of adsorbed pyridine, ATR-FTIR and electron paramagnetic resonance (EPR) spectra with isotope (18)O(3). It was verified that on the surface isolated hydroxyl groups and the surface hydroxyl groups without acid sites of these iron oxides, ozone was electrostatically adsorbed and did not interact with the surface of these oxides, stably existed as ozone molecule. In contrast, ozone could replace the surface hydroxyl groups on Lewis acid sites of oxides, and directly interacted with the surface metal ions, decomposing into reactive oxygen species (ROS) and initiating the surface metal redox. The results indicate that Lewis acid sites were active center while the electronic cycle of the Fe(2+)/Fe(3+) is advantageous to promote ozone decomposition into O(2)(•−) and (•)OH radicals. The mechanism of catalytic ozonation in different surface acid sites of iron oxides aqueous suspension was proposed on the basis of all experimental information. Nature Publishing Group UK 2019-10-14 /pmc/articles/PMC6791862/ /pubmed/31611622 http://dx.doi.org/10.1038/s41598-019-50910-w Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Yan, Liqiang Bing, Jishuai Wu, Hecheng The behavior of ozone on different iron oxides surface sites in water |
title | The behavior of ozone on different iron oxides surface sites in water |
title_full | The behavior of ozone on different iron oxides surface sites in water |
title_fullStr | The behavior of ozone on different iron oxides surface sites in water |
title_full_unstemmed | The behavior of ozone on different iron oxides surface sites in water |
title_short | The behavior of ozone on different iron oxides surface sites in water |
title_sort | behavior of ozone on different iron oxides surface sites in water |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6791862/ https://www.ncbi.nlm.nih.gov/pubmed/31611622 http://dx.doi.org/10.1038/s41598-019-50910-w |
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