Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene
The present work reports adsorption/desorption studies of benzothiophene (BT) onto SBA-15 loaded with Fe, Pd and Cu employing in situ FT-IR spectroscopy and batch liquid-phase adsorption methods. The adsorbents were prepared by post-synthesis impregnation of metal salts onto pure siliceous SBA-15 by...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2011-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.29.7.691 |
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| author | Enrique Vilarrasa-García Diana C.S. Azevedo Pilar Braos-García Antonia Infantes-Molina Célio L. Cavalcante José Jiménez-Jiménez Antonio Jiménez-Lopez Enrique Rodríguez-Castellón |
| author_facet | Enrique Vilarrasa-García Diana C.S. Azevedo Pilar Braos-García Antonia Infantes-Molina Célio L. Cavalcante José Jiménez-Jiménez Antonio Jiménez-Lopez Enrique Rodríguez-Castellón |
| author_sort | Enrique Vilarrasa-García |
| collection | DOAJ |
| description | The present work reports adsorption/desorption studies of benzothiophene (BT) onto SBA-15 loaded with Fe, Pd and Cu employing in situ FT-IR spectroscopy and batch liquid-phase adsorption methods. The adsorbents were prepared by post-synthesis impregnation of metal salts onto pure siliceous SBA-15 by solid mixture and incipient wetness methods. The adsorbents were characterized by nitrogen adsorption isotherms, TEM, X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The incorporated metals, in different oxidation states, were dispersed as nanoparticles on the mesoporous channels of SBA-15. The surface area decreased significantly for samples with incorporated metals, especially for those prepared by solid-mixture impregnation (Cu and Pd), although the hexagonal arrangement and the average pore size remained virtually unaltered. As revealed by batch adsorption isotherms, the incorporation of metals effectively increased the retention of the adsorbent towards the sulphur compound in the following order: Pd < Fe > Cu. DRIFT spectra (under in situ adsorption/desorption conditions) of the samples containing Fe and Pd showed that adsorption of BT onto the former is mainly reversible, whereas BT seems to be chemisorbed in the latter and did not desorb readily upon thermal treatment under He flow. |
| format | Article |
| id | doaj-art-64e0875f775c4fb3addb6220185cfd98 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2011-07-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-64e0875f775c4fb3addb6220185cfd982025-01-02T22:38:05ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382011-07-012910.1260/0263-6174.29.7.691Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of BenzothiopheneEnrique Vilarrasa-García0Diana C.S. Azevedo1Pilar Braos-García2Antonia Infantes-Molina3Célio L. Cavalcante4José Jiménez-Jiménez5Antonio Jiménez-Lopez6Enrique Rodríguez-Castellón7 Departmento de Química Inorgánica, Facultad de Ciencias (Unidad Asociada al ICP-CSIC), Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain Grupo de Pesquisa em Separações por Adsorção (GPSA), Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, 60455-760, Fortaleza, Brazil Departmento de Química Inorgánica, Facultad de Ciencias (Unidad Asociada al ICP-CSIC), Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain Instituto de Catálisis y Petroleoquímica, CSIC, c/ Marie Curie, 2, Cantoblanco, 28049 Madrid, Spain Grupo de Pesquisa em Separações por Adsorção (GPSA), Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, 60455-760, Fortaleza, Brazil Departmento de Química Inorgánica, Facultad de Ciencias (Unidad Asociada al ICP-CSIC), Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain Departmento de Química Inorgánica, Facultad de Ciencias (Unidad Asociada al ICP-CSIC), Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain Departmento de Química Inorgánica, Facultad de Ciencias (Unidad Asociada al ICP-CSIC), Universidad de Málaga, Campus de Teatinos, 29071, Málaga, SpainThe present work reports adsorption/desorption studies of benzothiophene (BT) onto SBA-15 loaded with Fe, Pd and Cu employing in situ FT-IR spectroscopy and batch liquid-phase adsorption methods. The adsorbents were prepared by post-synthesis impregnation of metal salts onto pure siliceous SBA-15 by solid mixture and incipient wetness methods. The adsorbents were characterized by nitrogen adsorption isotherms, TEM, X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The incorporated metals, in different oxidation states, were dispersed as nanoparticles on the mesoporous channels of SBA-15. The surface area decreased significantly for samples with incorporated metals, especially for those prepared by solid-mixture impregnation (Cu and Pd), although the hexagonal arrangement and the average pore size remained virtually unaltered. As revealed by batch adsorption isotherms, the incorporation of metals effectively increased the retention of the adsorbent towards the sulphur compound in the following order: Pd < Fe > Cu. DRIFT spectra (under in situ adsorption/desorption conditions) of the samples containing Fe and Pd showed that adsorption of BT onto the former is mainly reversible, whereas BT seems to be chemisorbed in the latter and did not desorb readily upon thermal treatment under He flow.https://doi.org/10.1260/0263-6174.29.7.691 |
| spellingShingle | Enrique Vilarrasa-García Diana C.S. Azevedo Pilar Braos-García Antonia Infantes-Molina Célio L. Cavalcante José Jiménez-Jiménez Antonio Jiménez-Lopez Enrique Rodríguez-Castellón Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene Adsorption Science & Technology |
| title | Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene |
| title_full | Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene |
| title_fullStr | Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene |
| title_full_unstemmed | Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene |
| title_short | Synthesis and Characterization of Metal-Supported Mesoporous Silicas Applied to the Adsorption of Benzothiophene |
| title_sort | synthesis and characterization of metal supported mesoporous silicas applied to the adsorption of benzothiophene |
| url | https://doi.org/10.1260/0263-6174.29.7.691 |
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