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Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B
Zirconium nitrate pentahydrate (Zr(NO(3))(4)·5H(2)O) and tetraethyl orthosilicate (TEOS) are used as the zirconium source and silicon source, respectively, and methyltriethoxysilane (MTES) as the hydrophobic modifier; the hydrophilic and hydrophobic ZrO(2)-SiO(2) xerogels were prepared successfully....
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9602328/ https://www.ncbi.nlm.nih.gov/pubmed/36286176 http://dx.doi.org/10.3390/gels8100675 |
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author | Liu, Yan Yang, Jing |
author_facet | Liu, Yan Yang, Jing |
author_sort | Liu, Yan |
collection | PubMed |
description | Zirconium nitrate pentahydrate (Zr(NO(3))(4)·5H(2)O) and tetraethyl orthosilicate (TEOS) are used as the zirconium source and silicon source, respectively, and methyltriethoxysilane (MTES) as the hydrophobic modifier; the hydrophilic and hydrophobic ZrO(2)-SiO(2) xerogels were prepared successfully. The xerogels were characterized using Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and N(2) adsorption–desorption measurement. The adsorption mechanism of hydrophobic ZrO(2)-SiO(2) xerogels to RhB was described by the kinetic and adsorption isotherms. The results showed that the introduction of Si-CH(3) groups can make the average pore size, BET surface area, and total pore volume of ZrO(2)-SiO(2) xerogel increase. The hydrophobic ZrO(2)-SiO(2) xerogel displays an adsorption capacity of 169.23 mg·g(−1) for RhB dye at 25 °C and pH = 3. The adsorption process of hydrophobic ZrO(2)-SiO(2) xerogel to RhB followed a pseudo–second-order kinetic model. Fitting results from the D–R model of adsorption indicate that the adsorption of RhB onto the hydrophobic ZrO(2)-SiO(2) xerogels is mainly physical, accompanied by a spontaneous heat absorption process. The regeneration and recycling properties of hydrophobic xerogels were investigated, and their recoverability and reusability were demonstrated. |
format | Online Article Text |
id | pubmed-9602328 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96023282022-10-27 Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B Liu, Yan Yang, Jing Gels Article Zirconium nitrate pentahydrate (Zr(NO(3))(4)·5H(2)O) and tetraethyl orthosilicate (TEOS) are used as the zirconium source and silicon source, respectively, and methyltriethoxysilane (MTES) as the hydrophobic modifier; the hydrophilic and hydrophobic ZrO(2)-SiO(2) xerogels were prepared successfully. The xerogels were characterized using Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and N(2) adsorption–desorption measurement. The adsorption mechanism of hydrophobic ZrO(2)-SiO(2) xerogels to RhB was described by the kinetic and adsorption isotherms. The results showed that the introduction of Si-CH(3) groups can make the average pore size, BET surface area, and total pore volume of ZrO(2)-SiO(2) xerogel increase. The hydrophobic ZrO(2)-SiO(2) xerogel displays an adsorption capacity of 169.23 mg·g(−1) for RhB dye at 25 °C and pH = 3. The adsorption process of hydrophobic ZrO(2)-SiO(2) xerogel to RhB followed a pseudo–second-order kinetic model. Fitting results from the D–R model of adsorption indicate that the adsorption of RhB onto the hydrophobic ZrO(2)-SiO(2) xerogels is mainly physical, accompanied by a spontaneous heat absorption process. The regeneration and recycling properties of hydrophobic xerogels were investigated, and their recoverability and reusability were demonstrated. MDPI 2022-10-20 /pmc/articles/PMC9602328/ /pubmed/36286176 http://dx.doi.org/10.3390/gels8100675 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Liu, Yan Yang, Jing Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title | Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title_full | Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title_fullStr | Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title_full_unstemmed | Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title_short | Hydrophobic Modification of ZrO(2)-SiO(2) Xerogel and Its Adsorption Properties to Rhodamine B |
title_sort | hydrophobic modification of zro(2)-sio(2) xerogel and its adsorption properties to rhodamine b |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9602328/ https://www.ncbi.nlm.nih.gov/pubmed/36286176 http://dx.doi.org/10.3390/gels8100675 |
work_keys_str_mv | AT liuyan hydrophobicmodificationofzro2sio2xerogelanditsadsorptionpropertiestorhodamineb AT yangjing hydrophobicmodificationofzro2sio2xerogelanditsadsorptionpropertiestorhodamineb |