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Nonionic triblock copolymer synthesis of SBA-15 above the isoelectric point of silica (pH=2-5) SCIE SCOPUS
- Title
- Nonionic triblock copolymer synthesis of SBA-15 above the isoelectric point of silica (pH=2-5)
- Date Issued
- 2005-08
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Under new mild conditions, above the isoelectric point of silica (pH=2-5), SBA-15 mesoporous silica with ordered hexagonal pores were prepared by pre-hydrolyzing of tetraethyl orthosilicate in the presence of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) as a template. Small angle X-ray scattering (SAXS), nitrogen adsorption and desorption experiments, and transmission electron micrograph (TEM) measurements showed well-ordered hexagonal array structure, though there are some changes in wall thickness and density with the increase of pH value from 2 to 5. (c) 2005 Elsevier B.V. All rights reserved.
- Keywords
- nanomaterials; sol-gel preparation; mesoporous silica; isoelectric point of silica; pre-hydrolyze; nonionic triblock copolymer; MESOPOROUS MOLECULAR-SIEVES; TEMPLATE; SURFACTANTS; SIZE; MORPHOLOGY; NANOWIRES
- ISSN
- 0167-577X
- Article Type
- Article
- Citation
- MATERIALS LETTERS, vol. 59, no. 18, page. 2257 - 2261, 2005-08
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