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Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red
The 3D hierarchical porous 7MgO·2B(2)O(3)·7H(2)O (MBH) microspheres were prepared by a phase transformation of chloropinnoite firstly, and anhydrous α-3MgO·B(2)O(3) (MBA) microspheres were obtained by thermal conversion of 7MgO·2B(2)O(3)·7H(2)O, and then β-3MgO·B(2)O(3) (MBB) microspheres were obtai...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9065457/ https://www.ncbi.nlm.nih.gov/pubmed/35514693 http://dx.doi.org/10.1039/c9ra03654g |
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author | Guo, Rui-Feng Ma, Yan-Qing Liu, Zhi-Hong |
author_facet | Guo, Rui-Feng Ma, Yan-Qing Liu, Zhi-Hong |
author_sort | Guo, Rui-Feng |
collection | PubMed |
description | The 3D hierarchical porous 7MgO·2B(2)O(3)·7H(2)O (MBH) microspheres were prepared by a phase transformation of chloropinnoite firstly, and anhydrous α-3MgO·B(2)O(3) (MBA) microspheres were obtained by thermal conversion of 7MgO·2B(2)O(3)·7H(2)O, and then β-3MgO·B(2)O(3) (MBB) microspheres were obtained by phase conversion of α-3MgO·B(2)O(3). All samples were characterized by XRD, FT-IR, TG and SEM. The microsphere nanostructures with a hierarchical porous structure were assembled by nanosheets with a thickness of 20–30 nm, and the growth mechanisms were also proposed. By using N(2) adsorption–desorption, the specific surface areas were measured as 103.62 m(2) g(−1) for MBH and 46.10 m(2) g(−1) for MBA. They exhibited excellent selective adsorption performance for Congo red (CR) with maximum adsorption capacities of 202.84 and 170.07 mg g(−1) respectively, and the corresponding adsorption mechanisms were also investigated. The adsorption processes were well fitted with the pseudo-second-order rate equation and Langmuir adsorption model. In addition, the corresponding adsorption thermodynamic parameters were also calculated. It is necessary to highlight that the hierarchical porous microspheres could be considered as promising candidates for removal of CR dye pollutants. |
format | Online Article Text |
id | pubmed-9065457 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90654572022-05-04 Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red Guo, Rui-Feng Ma, Yan-Qing Liu, Zhi-Hong RSC Adv Chemistry The 3D hierarchical porous 7MgO·2B(2)O(3)·7H(2)O (MBH) microspheres were prepared by a phase transformation of chloropinnoite firstly, and anhydrous α-3MgO·B(2)O(3) (MBA) microspheres were obtained by thermal conversion of 7MgO·2B(2)O(3)·7H(2)O, and then β-3MgO·B(2)O(3) (MBB) microspheres were obtained by phase conversion of α-3MgO·B(2)O(3). All samples were characterized by XRD, FT-IR, TG and SEM. The microsphere nanostructures with a hierarchical porous structure were assembled by nanosheets with a thickness of 20–30 nm, and the growth mechanisms were also proposed. By using N(2) adsorption–desorption, the specific surface areas were measured as 103.62 m(2) g(−1) for MBH and 46.10 m(2) g(−1) for MBA. They exhibited excellent selective adsorption performance for Congo red (CR) with maximum adsorption capacities of 202.84 and 170.07 mg g(−1) respectively, and the corresponding adsorption mechanisms were also investigated. The adsorption processes were well fitted with the pseudo-second-order rate equation and Langmuir adsorption model. In addition, the corresponding adsorption thermodynamic parameters were also calculated. It is necessary to highlight that the hierarchical porous microspheres could be considered as promising candidates for removal of CR dye pollutants. The Royal Society of Chemistry 2019-06-26 /pmc/articles/PMC9065457/ /pubmed/35514693 http://dx.doi.org/10.1039/c9ra03654g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Guo, Rui-Feng Ma, Yan-Qing Liu, Zhi-Hong Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title | Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title_full | Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title_fullStr | Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title_full_unstemmed | Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title_short | Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red |
title_sort | three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for congo red |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9065457/ https://www.ncbi.nlm.nih.gov/pubmed/35514693 http://dx.doi.org/10.1039/c9ra03654g |
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