Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio
| Title: | Non-Hydrothermal Synthesis of Cylindrical Mesoporous Materials: Influence of the Surfactant/Silica Molar Ratio |
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| Authors: | Deicy Barrera, Jhonny Villarroel-Rocha, Luis Marenco, Marcos I. Oliva, Karim Sapag |
| Source: | Adsorption Science & Technology, Vol 29 (2011) |
| Publisher Information: | SAGE Publishing, 2011. |
| Publication Year: | 2011 |
| Collection: | LCC:Physical and theoretical chemistry |
| Subject Terms: | Physical and theoretical chemistry, QD450-801 |
| More Details: | 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. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 0263-6174 2048-4038 |
| Relation: | https://doaj.org/toc/0263-6174; https://doaj.org/toc/2048-4038 |
| DOI: | 10.1260/0263-6174.29.10.975 |
| Access URL: | https://doaj.org/article/b0c5fbb497c84fe683e91d69bdb0c6cf |
| Accession Number: | edsdoj.b0c5fbb497c84fe683e91d69bdb0c6cf |
| Database: | Directory of Open Access Journals |
| ISSN: | 02636174 20484038 |
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| DOI: | 10.1260/0263-6174.29.10.975 |
| Published in: | Adsorption Science & Technology |
| Language: | English |