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Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light
In this study, Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst was prepared via a sol-gel method, and Fe(3)O(4) particles were used as the core of the colloid. Diffraction peaks of Fe(3)O(4) crystals are not found by XRD characterization, indicating that Fe(3)O(4) particles are well encapsulated by SiO(2). FT...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3118888/ https://www.ncbi.nlm.nih.gov/pubmed/21695039 http://dx.doi.org/10.3390/ijerph8041258 |
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author | Xu, Xuan Ji, Fangying Fan, Zihong He, Li |
author_facet | Xu, Xuan Ji, Fangying Fan, Zihong He, Li |
author_sort | Xu, Xuan |
collection | PubMed |
description | In this study, Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst was prepared via a sol-gel method, and Fe(3)O(4) particles were used as the core of the colloid. Diffraction peaks of Fe(3)O(4) crystals are not found by XRD characterization, indicating that Fe(3)O(4) particles are well encapsulated by SiO(2). FTIR characterization shows that diffraction peaks of Ti-O-Si chemical bonds become obvious when the Fe(3)O(4) loading is more than 0.5%. SEM characterization indicates that agglomeration occurs in the Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst, whereas photocatalysts modified by Fe(3)O(4)/SiO(2) present excellent visible light absorption performance and photocatalytic activity, especially when the Fe(3)O(4) loading is 0.5%. Photocatalytic degradation of glyphosate in soil by these photocatalysts under solar irradiation was investigated. Results show that 0.5% Fe(3)O(4)/SiO(2)/TiO(2) has the best photocatalytic activity. The best moisture content of soil is 30%∼50%. Degradation efficiency of glyphosate reaches 89% in 2 h when the dosage of photocatalyst is 0.4 g/100 g (soil), and it increased slowly when more photocatalyst was used. Soil thickness is a very important factor for the photocatalytic rate. The thinner the soil is, the better the glyphosate degradation is. Degradation of glyphosate is not obviously affected by sunlight intensity when the intensity is below 6 mW/cm(2) or above 10 mW/cm(2), but it is accelerated significantly when the sunlight intensity increases from 6 mW/cm(2) to 10 mW/cm(2). |
format | Online Article Text |
id | pubmed-3118888 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-31188882011-06-21 Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light Xu, Xuan Ji, Fangying Fan, Zihong He, Li Int J Environ Res Public Health Article In this study, Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst was prepared via a sol-gel method, and Fe(3)O(4) particles were used as the core of the colloid. Diffraction peaks of Fe(3)O(4) crystals are not found by XRD characterization, indicating that Fe(3)O(4) particles are well encapsulated by SiO(2). FTIR characterization shows that diffraction peaks of Ti-O-Si chemical bonds become obvious when the Fe(3)O(4) loading is more than 0.5%. SEM characterization indicates that agglomeration occurs in the Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst, whereas photocatalysts modified by Fe(3)O(4)/SiO(2) present excellent visible light absorption performance and photocatalytic activity, especially when the Fe(3)O(4) loading is 0.5%. Photocatalytic degradation of glyphosate in soil by these photocatalysts under solar irradiation was investigated. Results show that 0.5% Fe(3)O(4)/SiO(2)/TiO(2) has the best photocatalytic activity. The best moisture content of soil is 30%∼50%. Degradation efficiency of glyphosate reaches 89% in 2 h when the dosage of photocatalyst is 0.4 g/100 g (soil), and it increased slowly when more photocatalyst was used. Soil thickness is a very important factor for the photocatalytic rate. The thinner the soil is, the better the glyphosate degradation is. Degradation of glyphosate is not obviously affected by sunlight intensity when the intensity is below 6 mW/cm(2) or above 10 mW/cm(2), but it is accelerated significantly when the sunlight intensity increases from 6 mW/cm(2) to 10 mW/cm(2). Molecular Diversity Preservation International (MDPI) 2011-04 2011-04-21 /pmc/articles/PMC3118888/ /pubmed/21695039 http://dx.doi.org/10.3390/ijerph8041258 Text en © 2011 by the authors; licensee MDPI, Basel, Switzerland. http://creativecommons.org/licenses/by/3.0 This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Xu, Xuan Ji, Fangying Fan, Zihong He, Li Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title | Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title_full | Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title_fullStr | Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title_full_unstemmed | Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title_short | Degradation of Glyphosate in Soil Photocatalyzed by Fe(3)O(4)/SiO(2)/TiO(2) under Solar Light |
title_sort | degradation of glyphosate in soil photocatalyzed by fe(3)o(4)/sio(2)/tio(2) under solar light |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3118888/ https://www.ncbi.nlm.nih.gov/pubmed/21695039 http://dx.doi.org/10.3390/ijerph8041258 |
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