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Formation of Mesoporous Materials from Silica Dissolved in Various NaOH Concentrations: Effect of pH and Ionic Strength
Joint Authors
Han, Yosep
Kim, Hyunjung
Park, Jayhyun
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-07-12
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
We describe the effects of NaOH/SiO2 ratio and pH on the formation of mesoporous materials, which was synthesized via an alkali-metal hydroxide fusion method, from amorphous silica dissolved in NaOH.
Physical properties (e.g., specific surface area, pore volume, and pore size) of mesoporous materials synthesized at different conditions (i.e., pH, NaOH/SiO2 ratio) were evaluated through X-ray diffraction, nitrogen adsorption-desorption, and transmission electron microscope analyses.
The results showed that, at the NaOH/SiO2 ratios of 0.5, 1, and 2, gels were successfully synthesized while no product was formed at the NaOH/SiO2 ratios greater than 2.
Additionally, mesoporous materials were found to be formed at both pH 10 and 11 while they were unstable under more alkaline conditions.
The adsorption/desorption isotherm results for the mesoporous materials synthesized at around pH 11 and with NaOH/SiO2 ratios of 0.5–0.8 showed a hysteresis loop characteristic of the bottle-neck pore shape.
Furthermore, mesoporous materials with good physical properties were synthesized from all gels at pH 10 regardless of sodium concentration.
American Psychological Association (APA)
Park, Jayhyun& Han, Yosep& Kim, Hyunjung. 2012. Formation of Mesoporous Materials from Silica Dissolved in Various NaOH Concentrations: Effect of pH and Ionic Strength. Journal of Nanomaterials،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-998200
Modern Language Association (MLA)
Park, Jayhyun…[et al.]. Formation of Mesoporous Materials from Silica Dissolved in Various NaOH Concentrations: Effect of pH and Ionic Strength. Journal of Nanomaterials No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-998200
American Medical Association (AMA)
Park, Jayhyun& Han, Yosep& Kim, Hyunjung. Formation of Mesoporous Materials from Silica Dissolved in Various NaOH Concentrations: Effect of pH and Ionic Strength. Journal of Nanomaterials. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-998200
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-998200