Acceleration effect of sulfate ion on the dissolution of amorphous silica

Shuqin Bai; Shinji Urabe; Yoshihiro Okaue; Takushi Yokoyama

doi:10.1016/j.jcis.2008.11.076

Acceleration effect of sulfate ion on the dissolution of amorphous silica

Shuqin Bai, Shinji Urabe, Yoshihiro Okaue, Takushi Yokoyama

Inorganic and Analytical Chemistry

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The dissolution rate of amorphous silica is enhanced by sulfate ions. The zeta potential for silica particles in Na₂SO₄ solution was lower than that in NaCl solution with the same ionic strength. These facts indicate that the specific adsorption of sulfate ions occurred by overcoming repulsion between negative charges of the SO^2-₄ ion and Si{single bond}O^- on the surface of silica. The dissolution rate of amorphous silica may be accelerated by the specific adsorption of SO^2-₄ ions because of a decrease in the strength of the {triple bond, long}Si{single bond}O{single bond}Si{triple bond, long} bond in amorphous silica due to donation of electron density from the adsorbed SO^2-₄ ions.

Original language	English
Pages (from-to)	551-554
Number of pages	4
Journal	Journal of Colloid And Interface Science
Volume	331
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2008.11.076
Publication status	Published - Mar 15 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2008.11.076

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title = "Acceleration effect of sulfate ion on the dissolution of amorphous silica",

abstract = "The dissolution rate of amorphous silica is enhanced by sulfate ions. The zeta potential for silica particles in Na2SO4 solution was lower than that in NaCl solution with the same ionic strength. These facts indicate that the specific adsorption of sulfate ions occurred by overcoming repulsion between negative charges of the SO2-4 ion and Si{single bond}O- on the surface of silica. The dissolution rate of amorphous silica may be accelerated by the specific adsorption of SO2-4 ions because of a decrease in the strength of the {triple bond, long}Si{single bond}O{single bond}Si{triple bond, long} bond in amorphous silica due to donation of electron density from the adsorbed SO2-4 ions.",

author = "Shuqin Bai and Shinji Urabe and Yoshihiro Okaue and Takushi Yokoyama",

note = "Funding Information: The present work is supported by a Grant-in-Aid for the Global COE Program, “Science for Future Molecular Systems” from the Ministry of Education, Culture, Science, Sports, and Technology of Japan. This study was also financially supported from Kyushu University Interdisciplinary Programs in Education and Projects in Research Development.",

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AU - Bai, Shuqin

AU - Urabe, Shinji

AU - Okaue, Yoshihiro

AU - Yokoyama, Takushi

N1 - Funding Information: The present work is supported by a Grant-in-Aid for the Global COE Program, “Science for Future Molecular Systems” from the Ministry of Education, Culture, Science, Sports, and Technology of Japan. This study was also financially supported from Kyushu University Interdisciplinary Programs in Education and Projects in Research Development.

PY - 2009/3/15

Y1 - 2009/3/15

N2 - The dissolution rate of amorphous silica is enhanced by sulfate ions. The zeta potential for silica particles in Na2SO4 solution was lower than that in NaCl solution with the same ionic strength. These facts indicate that the specific adsorption of sulfate ions occurred by overcoming repulsion between negative charges of the SO2-4 ion and Si{single bond}O- on the surface of silica. The dissolution rate of amorphous silica may be accelerated by the specific adsorption of SO2-4 ions because of a decrease in the strength of the {triple bond, long}Si{single bond}O{single bond}Si{triple bond, long} bond in amorphous silica due to donation of electron density from the adsorbed SO2-4 ions.

AB - The dissolution rate of amorphous silica is enhanced by sulfate ions. The zeta potential for silica particles in Na2SO4 solution was lower than that in NaCl solution with the same ionic strength. These facts indicate that the specific adsorption of sulfate ions occurred by overcoming repulsion between negative charges of the SO2-4 ion and Si{single bond}O- on the surface of silica. The dissolution rate of amorphous silica may be accelerated by the specific adsorption of SO2-4 ions because of a decrease in the strength of the {triple bond, long}Si{single bond}O{single bond}Si{triple bond, long} bond in amorphous silica due to donation of electron density from the adsorbed SO2-4 ions.

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Acceleration effect of sulfate ion on the dissolution of amorphous silica

Abstract

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