Uniform formation of mesoporous silica shell on micron-sized cores in the presence of hydrocarbon used as a swelling agent
| العنوان: | Uniform formation of mesoporous silica shell on micron-sized cores in the presence of hydrocarbon used as a swelling agent |
|---|---|
| المؤلفون: | Haruyuki Ishii, Daisuke Nagao, Shunho Ishikawa, Mikio Konno, Arata Kanno, Mitsunobu Nara, Hashimoto Yuri |
| المصدر: | Journal of Sol-Gel Science and Technology. 85:539-545 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Cyclohexane, Dispersity, Shell (structure), 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Micelle, Biomaterials, chemistry.chemical_compound, Materials Chemistry, medicine, General Chemistry, Mesoporous silica, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Tetraethyl orthosilicate, chemistry, Chemical engineering, Ceramics and Composites, Swelling, medicine.symptom, 0210 nano-technology, Mesoporous material |
| الوصف: | Hydrolysis and condensation of tetraethyl orthosilicate (TEOS) with cetyltrimethylammonium bromide (CTAB) used as a template for mesopores were conducted to form mesoporous silica shell onto micron-sized silica spheres with low polydispersity. The concentration of TEOS suitable for uniform formation of the mesoporous shell was examined in the reactions in the presence or absence of nonpolar hydrocarbon that was used as a swelling agent to expand the size of CTAB micelles. Employment of cyclohexane (CyH) with a molecular weight lower than a conventional swelling agent of 1,3,5-trimethylbenzene could effectively expand mesopores in the shell uniformly covering the micron-sized spheres. SEM images of the core-shell particles in the sol–gel reaction reveled that a web-like surface feature on the core was observed in an early stage of shell formation, whereas uniform mesoporous shell was finally obtained on the core. The extension of mixing time for the swelling agent of CyH to be diffused into CTAB micelles resulted in an increase in uniformity in thickness of the mesoporous shell with the large sizes of mesopores. |
| تدمد: | 1573-4846 0928-0707 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e9e91c08603edf3ccb81c5b52fedd753 https://doi.org/10.1007/s10971-018-4589-y |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e9e91c08603edf3ccb81c5b52fedd753 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15734846 09280707 |
|---|