Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio
Ordered mesoporous materials of MCM-41 and SBA-15 type were synthesized under non-hydrothermal conditions using different molar ratios of surfactant/silica, ranging from 0.07 to 0.27 for MCM-41 and from 0.009 to 0.021 for SBA-15. Nitrogen adsorption/desorption isotherms at 77 K were used to evaluate...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2011-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.29.10.975 |
| _version_ | 1797283680627982336 |
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| author | Deicy Barrera Jhonny Villarroel-Rocha Luis Marenco Marcos I. Oliva Karim Sapag |
| author_facet | Deicy Barrera Jhonny Villarroel-Rocha Luis Marenco Marcos I. Oliva Karim Sapag |
| author_sort | Deicy Barrera |
| collection | DOAJ |
| description | Ordered mesoporous materials of MCM-41 and SBA-15 type were synthesized under non-hydrothermal conditions using different molar ratios of surfactant/silica, ranging from 0.07 to 0.27 for MCM-41 and from 0.009 to 0.021 for SBA-15. Nitrogen adsorption/desorption isotherms at 77 K were used to evaluate the specific surface areas, with values up to 1450 m 2 /g and 1100 m 2 /g being obtained for MCM-41 and SBA-15, respectively. Scanning electron microscopy was carried out to study the morphology of the materials. The sizes of the primary mesopores and the pore thicknesses were assessed by a geometrical method using X-ray diffraction and nitrogen adsorption data. The results for the pore sizes were compared with those obtained by a recently reported method (VBS-method) and the Non-Local Density Functional Theory (NLDFT) model, both proposed to evaluate the pore-size distribution of these materials. It was found that, under the synthesis conditions, the surfactant/silica molar ratio had an important effect on the final characteristics of these materials. |
| first_indexed | 2024-03-07T17:34:22Z |
| format | Article |
| id | doaj.art-b0c5fbb497c84fe683e91d69bdb0c6cf |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:34:22Z |
| publishDate | 2011-12-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-b0c5fbb497c84fe683e91d69bdb0c6cf2024-03-02T17:11:35ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382011-12-012910.1260/0263-6174.29.10.975Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar RatioDeicy Barrera0Jhonny Villarroel-Rocha1Luis Marenco2Marcos I. Oliva3Karim Sapag4 Laboratorio de Sólidos Porosos, Instituto de Física Aplicada, CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina Laboratorio de Sólidos Porosos, Instituto de Física Aplicada, CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina Laboratorio de Sólidos Porosos, Instituto de Física Aplicada, CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina IFEG-CONICET, FaMAF Universidad Nacional de Córdoba, Medina Allende S/N, Ciudad Universitaria, Córdoba, Argentina Laboratorio de Sólidos Porosos, Instituto de Física Aplicada, CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, ArgentinaOrdered mesoporous materials of MCM-41 and SBA-15 type were synthesized under non-hydrothermal conditions using different molar ratios of surfactant/silica, ranging from 0.07 to 0.27 for MCM-41 and from 0.009 to 0.021 for SBA-15. Nitrogen adsorption/desorption isotherms at 77 K were used to evaluate the specific surface areas, with values up to 1450 m 2 /g and 1100 m 2 /g being obtained for MCM-41 and SBA-15, respectively. Scanning electron microscopy was carried out to study the morphology of the materials. The sizes of the primary mesopores and the pore thicknesses were assessed by a geometrical method using X-ray diffraction and nitrogen adsorption data. The results for the pore sizes were compared with those obtained by a recently reported method (VBS-method) and the Non-Local Density Functional Theory (NLDFT) model, both proposed to evaluate the pore-size distribution of these materials. It was found that, under the synthesis conditions, the surfactant/silica molar ratio had an important effect on the final characteristics of these materials.https://doi.org/10.1260/0263-6174.29.10.975 |
| spellingShingle | Deicy Barrera Jhonny Villarroel-Rocha Luis Marenco Marcos I. Oliva Karim Sapag Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio Adsorption Science & Technology |
| title | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
| title_full | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
| title_fullStr | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
| title_full_unstemmed | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
| title_short | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
| title_sort | non hydrothermal synthesis of cylindrical mesoporous materials influence of the surfactant silica molar ratio |
| url | https://doi.org/10.1260/0263-6174.29.10.975 |
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