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Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application

A feasible approach was developed for the synthesis of ordered mesoporous SBA-15-type materials using coal fly ash (CFA) as raw material. In the proposed approach, CFA was, firstly, activated by subcritical water with the addition of NaOH, which allowed an efficient extraction of silicon species fro...

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Autores principales: Tan, Miaomiao, Pan, Dahai, Chen, Shuwei, Yan, Xiaoliang, Han, Lina, Li, Ruifeng, Wang, Jiancheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10096384/
https://www.ncbi.nlm.nih.gov/pubmed/37049161
http://dx.doi.org/10.3390/ma16072868
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author Tan, Miaomiao
Pan, Dahai
Chen, Shuwei
Yan, Xiaoliang
Han, Lina
Li, Ruifeng
Wang, Jiancheng
author_facet Tan, Miaomiao
Pan, Dahai
Chen, Shuwei
Yan, Xiaoliang
Han, Lina
Li, Ruifeng
Wang, Jiancheng
author_sort Tan, Miaomiao
collection PubMed
description A feasible approach was developed for the synthesis of ordered mesoporous SBA-15-type materials using coal fly ash (CFA) as raw material. In the proposed approach, CFA was, firstly, activated by subcritical water with the addition of NaOH, which allowed an efficient extraction of silicon species from CFA under strong acidic conditions at near room temperature. Subsequently, in the synthesis system, using silicon extraction solution as the silicon precursor, the introduction of anhydrous ethanol as a co-solvent effectively inhibited the polymerization of silanol species and promoted their collaborative self-assembly with surfactant molecules by enhancing the hydrogen bond interactions. The resultant SBA-15 material had a high purity, high specific surface area (1014 m(2)/g) and pore volume (1.08 cm(3)/g), and a highly ordered mesostructure, and, therefore, exhibited an excellent removal efficiency (90.5%) and adsorption capacity (160.8 mg/g) for methylene blue (MB) from simulated wastewater. Additionally, the generation of surface acid sites from the homogenous incorporation of Al atoms onto the mesoporous walls of SBA-15 combined with the perfect retention of the ordered mesostructure endowed the obtained Al-SBA-15 material with a further boost in the removal performance of MB. The MB removal efficiency can reach ~100%, along with a maximum adsorption capacity of 190.1 mg/g.
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spelling pubmed-100963842023-04-13 Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application Tan, Miaomiao Pan, Dahai Chen, Shuwei Yan, Xiaoliang Han, Lina Li, Ruifeng Wang, Jiancheng Materials (Basel) Article A feasible approach was developed for the synthesis of ordered mesoporous SBA-15-type materials using coal fly ash (CFA) as raw material. In the proposed approach, CFA was, firstly, activated by subcritical water with the addition of NaOH, which allowed an efficient extraction of silicon species from CFA under strong acidic conditions at near room temperature. Subsequently, in the synthesis system, using silicon extraction solution as the silicon precursor, the introduction of anhydrous ethanol as a co-solvent effectively inhibited the polymerization of silanol species and promoted their collaborative self-assembly with surfactant molecules by enhancing the hydrogen bond interactions. The resultant SBA-15 material had a high purity, high specific surface area (1014 m(2)/g) and pore volume (1.08 cm(3)/g), and a highly ordered mesostructure, and, therefore, exhibited an excellent removal efficiency (90.5%) and adsorption capacity (160.8 mg/g) for methylene blue (MB) from simulated wastewater. Additionally, the generation of surface acid sites from the homogenous incorporation of Al atoms onto the mesoporous walls of SBA-15 combined with the perfect retention of the ordered mesostructure endowed the obtained Al-SBA-15 material with a further boost in the removal performance of MB. The MB removal efficiency can reach ~100%, along with a maximum adsorption capacity of 190.1 mg/g. MDPI 2023-04-04 /pmc/articles/PMC10096384/ /pubmed/37049161 http://dx.doi.org/10.3390/ma16072868 Text en © 2023 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
Tan, Miaomiao
Pan, Dahai
Chen, Shuwei
Yan, Xiaoliang
Han, Lina
Li, Ruifeng
Wang, Jiancheng
Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title_full Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title_fullStr Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title_full_unstemmed Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title_short Synthesis of Coal-Fly-Ash-Based Ordered Mesoporous Materials and Their Adsorption Application
title_sort synthesis of coal-fly-ash-based ordered mesoporous materials and their adsorption application
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10096384/
https://www.ncbi.nlm.nih.gov/pubmed/37049161
http://dx.doi.org/10.3390/ma16072868
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