Formation of Silica Nanoparticles by Hydrolysis of TEOS Using a Mixed Semi-Batch/Batch Method
- Title
- Formation of Silica Nanoparticles by Hydrolysis of TEOS Using a Mixed Semi-Batch/Batch Method
- Author
- 김희택
- Keywords
- silica; TEOS; semi-batch/batch; hydrolysis; optimal condition
- Issue Date
- 2002-12
- Publisher
- KLUWER ACADEMIC PUBL
- Citation
- JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, v. 25, issue. 3, page. 183-189
- Abstract
- A new method for preparing silica nanoparticles, which consists of a two-stage semi-batch/batch
hydrolysis reaction of tetraethylorthosilicate (TEOS), is presented. A relatively slow rate of hydrolysis of the TEOS
occurred during the semi-batch process, which resulted in larger silica particles with a narrower size distribution.
This was in direct contrast to the batch process. An example of reduction in particle size for an initial semi-batch and
subsequent batch reaction is shown. On completion of the initial semi-batch step, the silica particles had a diameter
of 106 nm. As the subsequent batch reaction proceeded, the mean size of the particles decreased to 23 nm. In this
work, it was found that the optimal conditions for the silica nanoparticles using this mixed method were as follows;
(TEOS: 0.5 M, H2O: 6.0 M, NH4OH: 0.2 M, feed rate: 5.0 ml/min, temperature: 42.5◦C). In conclusion, a mixed
semi-batch/batch system suggested a new probability for the synthesis of nanoparticles.
- URI
- https://www.proquest.com/docview/2259563603?accountid=11283https://repository.hanyang.ac.kr/handle/20.500.11754/158191
- ISSN
- 0928-0707
- DOI
- 10.1023/A:1020217105290
- Appears in Collections:
- ETC[S] > 연구정보
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