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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...

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Autores principales: Guo, Rui-Feng, Ma, Yan-Qing, Liu, Zhi-Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
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.
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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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