Isomorphic substitution and postsynthesis incorporation of zirconium into MCM-48 mesoporous silica

被引：136

作者：

Morey, MS

Stucky, GD ^{[1
]}

Schwarz, S

Fröba, M

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Mat, Santa Barbara, CA 93106 USA

[2] Dupont Co, Cent Res & Dev, DuPont Expt Stn, Wilmington, DE 19880 USA

[3] Univ Hamburg, Inst Inorgan & Appl Chem, D-20146 Hamburg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 12期

关键词：

D O I：

10.1021/jp980844t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We describe the introduction of zirconium metal centers into the cubic phase of mesoporous silica. Two methods of zirconium incorporation were compared consisting of hydrothermal Si/Zr coprecipitation and postsynthesis functionalization of surface silanols with zirconium propoxide. Nitrogen sorption and X-ray powder diffraction confirmed that both the structure, high surface area, and narrow pore size distribution were maintained. FTIR, UV/Vis, and EXAFS were then employed to characterize the local metal atom bonding and coordination environment. Grafting with zirconium propoxide was found to produce the most isolated metal species.

引用

页码：2037 / 2041

页数：5

共 23 条

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