Porous structure of PEG-mediated silica controlled by solution pH Full article
| Journal |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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| Output data | Year: 2020, Volume: 307, Pages: 110468 Pages count : 5 DOI: 10.1016/j.micromeso.2020.110468 | ||
| Tags | Sol-gel, Silica, PEG, pH, Structure-directing agent | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | V. 47 |
Abstract:
This paper continues our previous study of porous amorphous silica prepared by the sol-gel method using polyethylene glycol (PEG) as structure-directing agent [O.V. Gorbunova et al., Microporous and Mesoporous Materials 190 (2014) 146–151]. Here we analyze the effect of acidic pH on the porous structure of silica synthesized with PEG. The results of adsorption studies and 29Si NMR spectroscopy data allow us to declare the possibility of tuning the porous structure of the amorphous silica materials exploiting the PEG concentration and pH of the growth solution. Our results reveal that a gradual increase of the solution pH in the presence of PEG initiates the growth of specific surface area, specific mesopore volume and average pore size. We found that PEG makes it possible to obtain microporous silica materials in the pH region of stable sols (from 1 to 3). When pH is in the range from 4 to 5, micro-mesoporous materials with pore size less than 4 nm are formed.
Cite:
Gorbunova O.V.
, Baklanova O.N.
, Gulyaeva T.I.
Porous structure of PEG-mediated silica controlled by solution pH
Microporous and Mesoporous Materials. 2020. V.307. P.110468. DOI: 10.1016/j.micromeso.2020.110468 WOS Scopus РИНЦ OpenAlex
Porous structure of PEG-mediated silica controlled by solution pH
Microporous and Mesoporous Materials. 2020. V.307. P.110468. DOI: 10.1016/j.micromeso.2020.110468 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | May 3, 2020 |
| Accepted: | Jul 5, 2020 |
| Published online: | Jul 24, 2020 |
| Published print: | Nov 1, 2020 |
Identifiers:
| Web of science: | WOS:000572431000009 |
| Scopus: | 2-s2.0-85089009365 |
| Elibrary: | 45385238 |
| OpenAlex: | W3044616806 |