An optimized sol–gel synthesis of stable primary equivalent silica particles
An optimized synthesis of nanometer silica particles via hydrolysis and condensation of tetraethylorthosilicate (TEOS) is described. At the optimum experimental conditions, homogeneous and stable silica nanoparticles with mean particles size of 7.1 ± 1.9 nm were obtained. The particle size is in a g...
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| Format: | Article |
| Language: | English |
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Elsevier
2007
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| Online Access: | https://eprints.ums.edu.my/id/eprint/21719/1/An%20optimized%20sol%E2%80%93gel%20synthesis%20of%20stable%20primary%20equivalent%20silica%20particles.pdf |
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| author | Ismail Ab B. Rahman P. Vejayakumaran Coswald Stephen Sipaut @ Mohd Nasri M. Abu Bakar Pierre Didier Choong Kooi Chee |
| author_facet | Ismail Ab B. Rahman P. Vejayakumaran Coswald Stephen Sipaut @ Mohd Nasri M. Abu Bakar Pierre Didier Choong Kooi Chee |
| author_sort | Ismail Ab B. Rahman |
| collection | UMS |
| description | An optimized synthesis of nanometer silica particles via hydrolysis and condensation of tetraethylorthosilicate (TEOS) is described. At the optimum experimental conditions, homogeneous and stable silica nanoparticles with mean particles size of 7.1 ± 1.9 nm were obtained. The particle size is in a good agreement with primary particles. The size, size distribution (SD) and the yield of silica were controlled by the concentration of the reactants, ammonia feed rate, temperature and mixing mode. The increase in TEOS concentration resulted in bigger and multi-model distributed powder, while high temperature and magnetic agitation produced a highly aggregated powder. However, higher H2O/TEOS ratio and lower ammonia concentration at slower feed rate produced particles in the range of 10–14 nm. It was also found that the concentration of silanol group increased significantly with the decrease in particle size, especially below 40 nm. The optimized technique developed is simple and reproducible, affording a high yield of ∼75% of nanometer silica in a primary size range. |
| first_indexed | 2024-03-06T02:59:00Z |
| format | Article |
| id | ums.eprints-21719 |
| institution | Universiti Malaysia Sabah |
| language | English |
| last_indexed | 2024-03-06T02:59:00Z |
| publishDate | 2007 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | ums.eprints-217192019-04-02T01:06:35Z https://eprints.ums.edu.my/id/eprint/21719/ An optimized sol–gel synthesis of stable primary equivalent silica particles Ismail Ab B. Rahman P. Vejayakumaran Coswald Stephen Sipaut @ Mohd Nasri M. Abu Bakar Pierre Didier Choong Kooi Chee TP Chemical technology An optimized synthesis of nanometer silica particles via hydrolysis and condensation of tetraethylorthosilicate (TEOS) is described. At the optimum experimental conditions, homogeneous and stable silica nanoparticles with mean particles size of 7.1 ± 1.9 nm were obtained. The particle size is in a good agreement with primary particles. The size, size distribution (SD) and the yield of silica were controlled by the concentration of the reactants, ammonia feed rate, temperature and mixing mode. The increase in TEOS concentration resulted in bigger and multi-model distributed powder, while high temperature and magnetic agitation produced a highly aggregated powder. However, higher H2O/TEOS ratio and lower ammonia concentration at slower feed rate produced particles in the range of 10–14 nm. It was also found that the concentration of silanol group increased significantly with the decrease in particle size, especially below 40 nm. The optimized technique developed is simple and reproducible, affording a high yield of ∼75% of nanometer silica in a primary size range. Elsevier 2007 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/21719/1/An%20optimized%20sol%E2%80%93gel%20synthesis%20of%20stable%20primary%20equivalent%20silica%20particles.pdf Ismail Ab B. Rahman and P. Vejayakumaran and Coswald Stephen Sipaut @ Mohd Nasri and M. Abu Bakar and Pierre Didier and Choong Kooi Chee (2007) An optimized sol–gel synthesis of stable primary equivalent silica particles. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 294. pp. 102-110. ISSN 0927-7757 |
| spellingShingle | TP Chemical technology Ismail Ab B. Rahman P. Vejayakumaran Coswald Stephen Sipaut @ Mohd Nasri M. Abu Bakar Pierre Didier Choong Kooi Chee An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title | An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title_full | An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title_fullStr | An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title_full_unstemmed | An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title_short | An optimized sol–gel synthesis of stable primary equivalent silica particles |
| title_sort | optimized sol gel synthesis of stable primary equivalent silica particles |
| topic | TP Chemical technology |
| url | https://eprints.ums.edu.my/id/eprint/21719/1/An%20optimized%20sol%E2%80%93gel%20synthesis%20of%20stable%20primary%20equivalent%20silica%20particles.pdf |
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