Improved synthesis of highly ordered Co-MCM-41

Sangyun Lim; Dragos Ciuparu; Yanhui Yang; Guoan Du; Lisa D. Pfefferle; Gary L. Haller

doi:10.1016/j.micromeso.2006.11.002

Improved synthesis of highly ordered Co-MCM-41

Sangyun Lim, Dragos Ciuparu, Yanhui Yang, Guoan Du, Lisa D. Pfefferle, Gary L. Haller

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

35 Scopus citations

Abstract

Transition metal incorporated MCM-41 materials were synthesized by careful control of multiple factors affecting the final product quality. Among them, the pH adjustment of the initial synthesis solution of Co-MCM-41 was crucial for the distribution of metallic ions in the silica framework. Higher pH significantly improved the physical structure of Co-MCM-41 and is accompanied by higher porosity. Each pore of Co-MCM-41, at the optimum pH, exhibited a hexagonal pore shaped entrance, not just the usual hexagonal array of pores of approximate circular shape. A mild acid treatment of Co-MCM-41 was a useful technique to remove surface metal oxide, which causes lowering of reduction stability by hydrogen spillover on the surface.

Original language	English
Pages (from-to)	200-206
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	101
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.micromeso.2006.11.002
State	Published - 19 Apr 2007
Externally published	Yes

Keywords

Acid treatment
Co-MCM-41
Nitrogen physisorption
Pore shape
TEM
XRD

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10.1016/j.micromeso.2006.11.002

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title = "Improved synthesis of highly ordered Co-MCM-41",

abstract = "Transition metal incorporated MCM-41 materials were synthesized by careful control of multiple factors affecting the final product quality. Among them, the pH adjustment of the initial synthesis solution of Co-MCM-41 was crucial for the distribution of metallic ions in the silica framework. Higher pH significantly improved the physical structure of Co-MCM-41 and is accompanied by higher porosity. Each pore of Co-MCM-41, at the optimum pH, exhibited a hexagonal pore shaped entrance, not just the usual hexagonal array of pores of approximate circular shape. A mild acid treatment of Co-MCM-41 was a useful technique to remove surface metal oxide, which causes lowering of reduction stability by hydrogen spillover on the surface.",

keywords = "Acid treatment, Co-MCM-41, Nitrogen physisorption, Pore shape, TEM, XRD",

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T1 - Improved synthesis of highly ordered Co-MCM-41

AU - Lim, Sangyun

AU - Ciuparu, Dragos

AU - Yang, Yanhui

AU - Du, Guoan

AU - Pfefferle, Lisa D.

AU - Haller, Gary L.

PY - 2007/4/19

Y1 - 2007/4/19

N2 - Transition metal incorporated MCM-41 materials were synthesized by careful control of multiple factors affecting the final product quality. Among them, the pH adjustment of the initial synthesis solution of Co-MCM-41 was crucial for the distribution of metallic ions in the silica framework. Higher pH significantly improved the physical structure of Co-MCM-41 and is accompanied by higher porosity. Each pore of Co-MCM-41, at the optimum pH, exhibited a hexagonal pore shaped entrance, not just the usual hexagonal array of pores of approximate circular shape. A mild acid treatment of Co-MCM-41 was a useful technique to remove surface metal oxide, which causes lowering of reduction stability by hydrogen spillover on the surface.

AB - Transition metal incorporated MCM-41 materials were synthesized by careful control of multiple factors affecting the final product quality. Among them, the pH adjustment of the initial synthesis solution of Co-MCM-41 was crucial for the distribution of metallic ions in the silica framework. Higher pH significantly improved the physical structure of Co-MCM-41 and is accompanied by higher porosity. Each pore of Co-MCM-41, at the optimum pH, exhibited a hexagonal pore shaped entrance, not just the usual hexagonal array of pores of approximate circular shape. A mild acid treatment of Co-MCM-41 was a useful technique to remove surface metal oxide, which causes lowering of reduction stability by hydrogen spillover on the surface.

KW - Acid treatment

KW - Co-MCM-41

KW - Nitrogen physisorption

KW - Pore shape

KW - TEM

KW - XRD

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DO - 10.1016/j.micromeso.2006.11.002

M3 - 文章

AN - SCOPUS:33947715463

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JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

IS - 1-2 SPEC. ISS.

ER -

Improved synthesis of highly ordered Co-MCM-41

Abstract

Keywords

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