Grafting sulfated zirconia on mesoporous silica

Yong Wang; Kwan Young Lee; Saemin Choi; Jun Liu; Li Qiong Wang; Charles H.F. Peden

doi:10.1039/b614928f

Grafting sulfated zirconia on mesoporous silica

Yong Wang, Kwan Young Lee, Saemin Choi, Jun Liu, Li Qiong Wang, Charles H.F. Peden

Department of Chemical and Biological Engineering

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

23 Citations (Scopus)

Abstract

Recently, sulfated zirconia has received considerable attention as a potential solid acid catalyst to replace problematic homogeneous acid catalysts. In this paper, the preparation and properties of acid catalysts obtained by grafting ziconia with atomic precision on MCM-41 mesoporous silica were studied. TEM and potential titration characterizations revealed that ZrO₂/MCM-41 with monolayer coverage can be obtained using this grafting technique. Sulfated ZrO₂/MCM-41 exhibits improved thermal stability than that of bulk sulfated zirconia, as evidenced by temperature programmed characterizations and XRD analysis. Temperature programmed reaction of isopropanol was used to evaluate the acidity of sulfated ZrO₂/MCM-41. It was found that the acid strength of sulfated ZrO₂/MCM-41 with monolayer coverage is weaker than bulk sulfated zirconia but stronger than SiO₂–Al₂O₃, a common strong acid catalyst.

Original language	English
Pages (from-to)	540-554
Number of pages	15
Journal	Green Chemistry
Volume	9
Issue number	6
DOIs	https://doi.org/10.1039/b614928f
Publication status	Published - 2007 May 17

ASJC Scopus subject areas

Environmental Chemistry
Pollution

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abstract = "Recently, sulfated zirconia has received considerable attention as a potential solid acid catalyst to replace problematic homogeneous acid catalysts. In this paper, the preparation and properties of acid catalysts obtained by grafting ziconia with atomic precision on MCM-41 mesoporous silica were studied. TEM and potential titration characterizations revealed that ZrO2/MCM-41 with monolayer coverage can be obtained using this grafting technique. Sulfated ZrO2/MCM-41 exhibits improved thermal stability than that of bulk sulfated zirconia, as evidenced by temperature programmed characterizations and XRD analysis. Temperature programmed reaction of isopropanol was used to evaluate the acidity of sulfated ZrO2/MCM-41. It was found that the acid strength of sulfated ZrO2/MCM-41 with monolayer coverage is weaker than bulk sulfated zirconia but stronger than SiO2–Al2O3, a common strong acid catalyst.",

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T1 - Grafting sulfated zirconia on mesoporous silica

AU - Wang, Yong

AU - Lee, Kwan Young

AU - Choi, Saemin

AU - Liu, Jun

AU - Wang, Li Qiong

AU - Peden, Charles H.F.

PY - 2007/5/17

Y1 - 2007/5/17

N2 - Recently, sulfated zirconia has received considerable attention as a potential solid acid catalyst to replace problematic homogeneous acid catalysts. In this paper, the preparation and properties of acid catalysts obtained by grafting ziconia with atomic precision on MCM-41 mesoporous silica were studied. TEM and potential titration characterizations revealed that ZrO2/MCM-41 with monolayer coverage can be obtained using this grafting technique. Sulfated ZrO2/MCM-41 exhibits improved thermal stability than that of bulk sulfated zirconia, as evidenced by temperature programmed characterizations and XRD analysis. Temperature programmed reaction of isopropanol was used to evaluate the acidity of sulfated ZrO2/MCM-41. It was found that the acid strength of sulfated ZrO2/MCM-41 with monolayer coverage is weaker than bulk sulfated zirconia but stronger than SiO2–Al2O3, a common strong acid catalyst.

AB - Recently, sulfated zirconia has received considerable attention as a potential solid acid catalyst to replace problematic homogeneous acid catalysts. In this paper, the preparation and properties of acid catalysts obtained by grafting ziconia with atomic precision on MCM-41 mesoporous silica were studied. TEM and potential titration characterizations revealed that ZrO2/MCM-41 with monolayer coverage can be obtained using this grafting technique. Sulfated ZrO2/MCM-41 exhibits improved thermal stability than that of bulk sulfated zirconia, as evidenced by temperature programmed characterizations and XRD analysis. Temperature programmed reaction of isopropanol was used to evaluate the acidity of sulfated ZrO2/MCM-41. It was found that the acid strength of sulfated ZrO2/MCM-41 with monolayer coverage is weaker than bulk sulfated zirconia but stronger than SiO2–Al2O3, a common strong acid catalyst.

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Grafting sulfated zirconia on mesoporous silica

Abstract

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