Functionalized sol-gels for mercury(II) separation: A comparison of mesoporous materials prepared with and without surfactant templates

Hee Jung Im; Craig E. Barnes; Sheng Dai; Ziling Xue

doi:10.1016/j.micromeso.2004.03.002

Functionalized sol-gels for mercury(II) separation: A comparison of mesoporous materials prepared with and without surfactant templates

Hee Jung Im, Craig E. Barnes, Sheng Dai, Ziling Xue

Chemical Sciences Division

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

45 Scopus citations

Abstract

Granular silica gels 1b (7.0 mol% ligand) and 1c (17.0 mol% ligand) containing different amounts of tethered mercapto ligand HS(CH₂)₃Si(O-)₃ were prepared in one step from the co-hydrolysis of HS(CH₂)₃Si(OMe) ₃ and Si(OMe)₄. Analyses of 1b revealed that it was mesoporous (pore diameter: ca. 50 Å) with a large surface area (471 m²/g). In 0.5, 5.0, 50, and 500 ppm Hg²⁺ solutions, 1b was found to have Hg²⁺ uptake capacities comparable to those of sub-micron mesoporous powders prepared with two different surfactants in the current studies. 1b and 1c removed Hg²⁺ ions to be below 5 × 10^-5 ppm (the detection limit of atomic absorption) from 0.368 and 50 ppm solutions, respectively. The granular 1b and 1c are easier to prepare and handle, and may offer an alternative to sub-micron powders prepared with surfactants for Hg(II) uptake.

Original language	English
Pages (from-to)	57-62
Number of pages	6
Journal	Microporous and Mesoporous Materials
Volume	70
Issue number	1-3
DOIs	https://doi.org/10.1016/j.micromeso.2004.03.002
State	Published - May 21 2004

Funding

The research reported here was supported by the US Department of Energy Environmental Management Science Program (#DE-FG07-97ER14817), National Science Foundation (CHE-0212137), and Camille Dreyfus Teacher-Scholar program. The authors thank Dr. Zuojiang Li and D. Lynn Rodman for help with the determination of pore size distributions, and reviewers for pointing out the errors in the earlier manuscript.

Funders	Funder number
US Department of Energy Environmental Management Science Program	-FG07-97ER14817
Camille and Henry Dreyfus Foundation
National Science Foundation	CHE-0212137

Keywords

Granular silica gels
Hg(II) separation
Mercapto ligand
Mesoporous

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10.1016/j.micromeso.2004.03.002

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title = "Functionalized sol-gels for mercury(II) separation: A comparison of mesoporous materials prepared with and without surfactant templates",

abstract = "Granular silica gels 1b (7.0 mol% ligand) and 1c (17.0 mol% ligand) containing different amounts of tethered mercapto ligand HS(CH2)3Si(O-)3 were prepared in one step from the co-hydrolysis of HS(CH2)3Si(OMe) 3 and Si(OMe)4. Analyses of 1b revealed that it was mesoporous (pore diameter: ca. 50 {\AA}) with a large surface area (471 m2/g). In 0.5, 5.0, 50, and 500 ppm Hg2+ solutions, 1b was found to have Hg2+ uptake capacities comparable to those of sub-micron mesoporous powders prepared with two different surfactants in the current studies. 1b and 1c removed Hg2+ ions to be below 5 × 10-5 ppm (the detection limit of atomic absorption) from 0.368 and 50 ppm solutions, respectively. The granular 1b and 1c are easier to prepare and handle, and may offer an alternative to sub-micron powders prepared with surfactants for Hg(II) uptake.",

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author = "Im, {Hee Jung} and Barnes, {Craig E.} and Sheng Dai and Ziling Xue",

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T2 - A comparison of mesoporous materials prepared with and without surfactant templates

AU - Im, Hee Jung

AU - Barnes, Craig E.

AU - Dai, Sheng

AU - Xue, Ziling

PY - 2004/5/21

Y1 - 2004/5/21

N2 - Granular silica gels 1b (7.0 mol% ligand) and 1c (17.0 mol% ligand) containing different amounts of tethered mercapto ligand HS(CH2)3Si(O-)3 were prepared in one step from the co-hydrolysis of HS(CH2)3Si(OMe) 3 and Si(OMe)4. Analyses of 1b revealed that it was mesoporous (pore diameter: ca. 50 Å) with a large surface area (471 m2/g). In 0.5, 5.0, 50, and 500 ppm Hg2+ solutions, 1b was found to have Hg2+ uptake capacities comparable to those of sub-micron mesoporous powders prepared with two different surfactants in the current studies. 1b and 1c removed Hg2+ ions to be below 5 × 10-5 ppm (the detection limit of atomic absorption) from 0.368 and 50 ppm solutions, respectively. The granular 1b and 1c are easier to prepare and handle, and may offer an alternative to sub-micron powders prepared with surfactants for Hg(II) uptake.

AB - Granular silica gels 1b (7.0 mol% ligand) and 1c (17.0 mol% ligand) containing different amounts of tethered mercapto ligand HS(CH2)3Si(O-)3 were prepared in one step from the co-hydrolysis of HS(CH2)3Si(OMe) 3 and Si(OMe)4. Analyses of 1b revealed that it was mesoporous (pore diameter: ca. 50 Å) with a large surface area (471 m2/g). In 0.5, 5.0, 50, and 500 ppm Hg2+ solutions, 1b was found to have Hg2+ uptake capacities comparable to those of sub-micron mesoporous powders prepared with two different surfactants in the current studies. 1b and 1c removed Hg2+ ions to be below 5 × 10-5 ppm (the detection limit of atomic absorption) from 0.368 and 50 ppm solutions, respectively. The granular 1b and 1c are easier to prepare and handle, and may offer an alternative to sub-micron powders prepared with surfactants for Hg(II) uptake.

KW - Granular silica gels

KW - Hg(II) separation

KW - Mercapto ligand

KW - Mesoporous

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Functionalized sol-gels for mercury(II) separation: A comparison of mesoporous materials prepared with and without surfactant templates

Abstract

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