Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions
Mesoporous organosilica materials containing ethane groups in their framework were formed with two and three pore sizes (i.e. bimodal and trimodal pores) when synthesised by the sol-gel method in the presence of cobalt ions. The compounds 1,2-bistrimethoxysilylethane and tetraethylorthosilicate wer...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Academy of Science of South Africa
2010-07-01
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| Series: | South African Journal of Science |
| Subjects: | |
| Online Access: | https://www.sajs.co.za/article/view/10132 |
| _version_ | 1818850156217368576 |
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| author | Neil Coville Alufelwi Tshavhungwe |
| author_facet | Neil Coville Alufelwi Tshavhungwe |
| author_sort | Neil Coville |
| collection | DOAJ |
| description | Mesoporous organosilica materials containing ethane groups in their framework were formed with two and three pore sizes (i.e. bimodal and trimodal pores) when synthesised by the sol-gel method in the presence of cobalt ions. The compounds 1,2-bistrimethoxysilylethane and tetraethylorthosilicate were used as silicon sources and the reactions were done in the presence of a surfactant, which served as a template. Diffuse reflectance infrared Fourier transform spectroscopy revealed that organic functional groups were incorporated into the ethanesilica. Powder X-ray diffraction and nitrogen adsorption data indicated that the mesophase and textural properties (surface area, pore volume, pore diameter) of the materials were dependent on the ageing temperature, the amount/ratio of silica precursors and cobalt ion incorporation. Secondary mesopores were drastically reduced by changing the ratio of silicon precursors. |
| first_indexed | 2024-12-19T06:44:39Z |
| format | Article |
| id | doaj.art-a12ad15cdfdd4c01ad70c48adfbfb7fe |
| institution | Directory Open Access Journal |
| issn | 1996-7489 |
| language | English |
| last_indexed | 2024-12-19T06:44:39Z |
| publishDate | 2010-07-01 |
| publisher | Academy of Science of South Africa |
| record_format | Article |
| series | South African Journal of Science |
| spelling | doaj.art-a12ad15cdfdd4c01ad70c48adfbfb7fe2022-12-21T20:31:58ZengAcademy of Science of South AfricaSouth African Journal of Science1996-74892010-07-011067/8Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ionsNeil Coville0Alufelwi Tshavhungwe1University of the WitwatersrandUniversity of the Witwatersrand and Department of Science and Technology, PretoriaMesoporous organosilica materials containing ethane groups in their framework were formed with two and three pore sizes (i.e. bimodal and trimodal pores) when synthesised by the sol-gel method in the presence of cobalt ions. The compounds 1,2-bistrimethoxysilylethane and tetraethylorthosilicate were used as silicon sources and the reactions were done in the presence of a surfactant, which served as a template. Diffuse reflectance infrared Fourier transform spectroscopy revealed that organic functional groups were incorporated into the ethanesilica. Powder X-ray diffraction and nitrogen adsorption data indicated that the mesophase and textural properties (surface area, pore volume, pore diameter) of the materials were dependent on the ageing temperature, the amount/ratio of silica precursors and cobalt ion incorporation. Secondary mesopores were drastically reduced by changing the ratio of silicon precursors.https://www.sajs.co.za/article/view/10132cobaltethanesilicamesoporous materialsporositysol-gel synthesis |
| spellingShingle | Neil Coville Alufelwi Tshavhungwe Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions South African Journal of Science cobalt ethanesilica mesoporous materials porosity sol-gel synthesis |
| title | Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions |
| title_full | Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions |
| title_fullStr | Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions |
| title_full_unstemmed | Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions |
| title_short | Mesoporous ethanesilica materials with bimodal and trimodal pore-size distributions synthesised in the presence of cobalt ions |
| title_sort | mesoporous ethanesilica materials with bimodal and trimodal pore size distributions synthesised in the presence of cobalt ions |
| topic | cobalt ethanesilica mesoporous materials porosity sol-gel synthesis |
| url | https://www.sajs.co.za/article/view/10132 |
| work_keys_str_mv | AT neilcoville mesoporousethanesilicamaterialswithbimodalandtrimodalporesizedistributionssynthesisedinthepresenceofcobaltions AT alufelwitshavhungwe mesoporousethanesilicamaterialswithbimodalandtrimodalporesizedistributionssynthesisedinthepresenceofcobaltions |