Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework
Herein, ordered mesoporous materials like SBA-15 and Al/SBA-15 were prepared using the pH adjustment method. Thus, these materials were developed in different pH of synthesis, from the pH adjustment method using a KCl/HCl solution and varying the Si/Al molar ratio (5, 25, and 75). All the ordered me...
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MDPI AG
2024-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/2/208 |
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| author | Francisco Gustavo Hayala Silveira Pinto Vinícius Patrício da Silva Caldeira Jhonny Villarroel-Rocha Karim Sapag Sibele Berenice Castellã Pergher Anne Gabriella Dias Santos |
| author_facet | Francisco Gustavo Hayala Silveira Pinto Vinícius Patrício da Silva Caldeira Jhonny Villarroel-Rocha Karim Sapag Sibele Berenice Castellã Pergher Anne Gabriella Dias Santos |
| author_sort | Francisco Gustavo Hayala Silveira Pinto |
| collection | DOAJ |
| description | Herein, ordered mesoporous materials like SBA-15 and Al/SBA-15 were prepared using the pH adjustment method. Thus, these materials were developed in different pH of synthesis, from the pH adjustment method using a KCl/HCl solution and varying the Si/Al molar ratio (5, 25, and 75). All the ordered mesoporous materials were characterized by FRX, <sup>27</sup>Al NMR, SEM, XRD, N<sub>2</sub> adsorption/desorption, and CO<sub>2</sub> adsorption. From the applied method, it was possible to obtain SBA-15 and Al/SBA-15 with high mesoscopic ordering based on the XRD patterns, independent of the pH employed. From the chemical composition, the insertion of higher amounts of Al into the synthesis caused a progressive improvement in the structural and textural properties of the ordered mesoporous materials. Thus, the chosen synthesis conditions can lead to different aluminum coordination (tetrahedral and octahedral), which gives these materials a greater potential to be applied. The presence of Al in high amounts provides material with the ability to form micropores. Finally, the proposed method proved to be innovative; low-cost; less aggressive to the environment, with efficient insertion of aluminum in the framework of SBA-15 mesoporous material; and practical, based on only one step. |
| first_indexed | 2024-03-08T10:39:27Z |
| format | Article |
| id | doaj.art-85ace9d83be940338ca6c507ab935f7c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-08T10:39:27Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-85ace9d83be940338ca6c507ab935f7c2024-01-26T17:58:40ZengMDPI AGNanomaterials2079-49912024-01-0114220810.3390/nano14020208Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the FrameworkFrancisco Gustavo Hayala Silveira Pinto0Vinícius Patrício da Silva Caldeira1Jhonny Villarroel-Rocha2Karim Sapag3Sibele Berenice Castellã Pergher4Anne Gabriella Dias Santos5Chemistry Department, State University of Rio Grande do Norte, Mossoró 59610-210, RN, BrazilChemistry Department, State University of Rio Grande do Norte, Mossoró 59610-210, RN, BrazilPorous Solids Laboratory, Institute of Applied Physics, CONICET, National University of San Luis, Ejército de los Andes 950, San Luis 5700, ArgentinaPorous Solids Laboratory, Institute of Applied Physics, CONICET, National University of San Luis, Ejército de los Andes 950, San Luis 5700, ArgentinaLABPEMOL, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal 59078-970, RN, BrazilChemistry Department, State University of Rio Grande do Norte, Mossoró 59610-210, RN, BrazilHerein, ordered mesoporous materials like SBA-15 and Al/SBA-15 were prepared using the pH adjustment method. Thus, these materials were developed in different pH of synthesis, from the pH adjustment method using a KCl/HCl solution and varying the Si/Al molar ratio (5, 25, and 75). All the ordered mesoporous materials were characterized by FRX, <sup>27</sup>Al NMR, SEM, XRD, N<sub>2</sub> adsorption/desorption, and CO<sub>2</sub> adsorption. From the applied method, it was possible to obtain SBA-15 and Al/SBA-15 with high mesoscopic ordering based on the XRD patterns, independent of the pH employed. From the chemical composition, the insertion of higher amounts of Al into the synthesis caused a progressive improvement in the structural and textural properties of the ordered mesoporous materials. Thus, the chosen synthesis conditions can lead to different aluminum coordination (tetrahedral and octahedral), which gives these materials a greater potential to be applied. The presence of Al in high amounts provides material with the ability to form micropores. Finally, the proposed method proved to be innovative; low-cost; less aggressive to the environment, with efficient insertion of aluminum in the framework of SBA-15 mesoporous material; and practical, based on only one step.https://www.mdpi.com/2079-4991/14/2/208Al/SBA-15hydrothermal synthesispH adjustmenton-step synthesis |
| spellingShingle | Francisco Gustavo Hayala Silveira Pinto Vinícius Patrício da Silva Caldeira Jhonny Villarroel-Rocha Karim Sapag Sibele Berenice Castellã Pergher Anne Gabriella Dias Santos Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework Nanomaterials Al/SBA-15 hydrothermal synthesis pH adjustment on-step synthesis |
| title | Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework |
| title_full | Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework |
| title_fullStr | Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework |
| title_full_unstemmed | Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework |
| title_short | Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework |
| title_sort | al sba 15 mesoporous material a study of ph influence over aluminum insertion into the framework |
| topic | Al/SBA-15 hydrothermal synthesis pH adjustment on-step synthesis |
| url | https://www.mdpi.com/2079-4991/14/2/208 |
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