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Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide
Magnetic attapulgite-Fe(3)O(4) nanocomposites (ATP-Fe(3)O(4)) were prepared by coprecipitation of Fe(3)O(4) on ATP. The composites were characterized by scanning electron microscopey, X-ray diffractometry, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectroscopy, energy dispersive spectrome...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5519544/ https://www.ncbi.nlm.nih.gov/pubmed/28729718 http://dx.doi.org/10.1038/s41598-017-06398-3 |
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author | Han, Shuwen Yu, Hemin Yang, Tingting Wang, Shengsen Wang, Xiaozhi |
author_facet | Han, Shuwen Yu, Hemin Yang, Tingting Wang, Shengsen Wang, Xiaozhi |
author_sort | Han, Shuwen |
collection | PubMed |
description | Magnetic attapulgite-Fe(3)O(4) nanocomposites (ATP-Fe(3)O(4)) were prepared by coprecipitation of Fe(3)O(4) on ATP. The composites were characterized by scanning electron microscopey, X-ray diffractometry, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectroscopy, energy dispersive spectrometer and transmission electron microscopy. Surface characterization showed that Fe(3)O(4) particles with an average size of approximately 15 nm were successfully embedded in matrix of ATP. The capacity of the Fe(3)O(4)-activated ATP (A-ATP@Fe(3)O(4)) composites for catalytic degradation of ethidium bromide (EtBr, 80 mg/L) at different pH values, hydrogen peroxide (H(2)O(2)) concentrations, temperatures, and catalyst dosages was investigated. EtBr degradation kinetics studies indicated that the pseudo-first-order kinetic constant was 2.445 min(−1) at T = 323 K and pH 2.0 with 30 mM H(2)O(2), and 1.5 g/L of A-ATP@Fe(3)O(4). Moreover, a regeneration study suggested that A-ATP@Fe(3)O(4) maintained over 80% of its maximal EtBr degradation ability after five successive cycles. The effects of the iron concentrations and free radical scavengers on EtBr degradation were studied to reveal possible catalytic mechanisms of the A-ATP@Fe(3)O(4) nanocomposites. Electron Paramagnetic Resonance revealed both hydroxyl (∙OH) and superoxide anion (∙O(2) (−)) radicals were involved in EtBr degradation. Radical scavenging experiment suggested EtBr degradation was mainly ascribed to ∙OH radicals, which was generated by reaction between Fe(2+) and H(2)O(2) on the surface of A-ATP@Fe(3)O(4). |
format | Online Article Text |
id | pubmed-5519544 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55195442017-07-21 Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide Han, Shuwen Yu, Hemin Yang, Tingting Wang, Shengsen Wang, Xiaozhi Sci Rep Article Magnetic attapulgite-Fe(3)O(4) nanocomposites (ATP-Fe(3)O(4)) were prepared by coprecipitation of Fe(3)O(4) on ATP. The composites were characterized by scanning electron microscopey, X-ray diffractometry, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectroscopy, energy dispersive spectrometer and transmission electron microscopy. Surface characterization showed that Fe(3)O(4) particles with an average size of approximately 15 nm were successfully embedded in matrix of ATP. The capacity of the Fe(3)O(4)-activated ATP (A-ATP@Fe(3)O(4)) composites for catalytic degradation of ethidium bromide (EtBr, 80 mg/L) at different pH values, hydrogen peroxide (H(2)O(2)) concentrations, temperatures, and catalyst dosages was investigated. EtBr degradation kinetics studies indicated that the pseudo-first-order kinetic constant was 2.445 min(−1) at T = 323 K and pH 2.0 with 30 mM H(2)O(2), and 1.5 g/L of A-ATP@Fe(3)O(4). Moreover, a regeneration study suggested that A-ATP@Fe(3)O(4) maintained over 80% of its maximal EtBr degradation ability after five successive cycles. The effects of the iron concentrations and free radical scavengers on EtBr degradation were studied to reveal possible catalytic mechanisms of the A-ATP@Fe(3)O(4) nanocomposites. Electron Paramagnetic Resonance revealed both hydroxyl (∙OH) and superoxide anion (∙O(2) (−)) radicals were involved in EtBr degradation. Radical scavenging experiment suggested EtBr degradation was mainly ascribed to ∙OH radicals, which was generated by reaction between Fe(2+) and H(2)O(2) on the surface of A-ATP@Fe(3)O(4). Nature Publishing Group UK 2017-07-20 /pmc/articles/PMC5519544/ /pubmed/28729718 http://dx.doi.org/10.1038/s41598-017-06398-3 Text en © The Author(s) 2017 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 Han, Shuwen Yu, Hemin Yang, Tingting Wang, Shengsen Wang, Xiaozhi Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title | Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title_full | Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title_fullStr | Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title_full_unstemmed | Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title_short | Magnetic Activated-ATP@Fe(3)O(4) Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide |
title_sort | magnetic activated-atp@fe(3)o(4) nanocomposite as an efficient fenton-like heterogeneous catalyst for degradation of ethidium bromide |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5519544/ https://www.ncbi.nlm.nih.gov/pubmed/28729718 http://dx.doi.org/10.1038/s41598-017-06398-3 |
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