Iron oxide colloids and their heterogenization by silica sol-gel entrapment: Catalytic and magnetic properties

被引：12

作者：

Neatu, Florentina ^{[1
]}

Kraynov, Alexander ^{[2
]}

D'Souza, Lawrence ^{[2
]}

Parvulescu, Vasile I. ^{[1
]}

Kranjc, Kristof ^{[3
]}

Kocevar, Marijan ^{[3
]}

Kuncser, Victor ^{[4
]}

Richards, Ryan ^{[5
]}

机构：

[1] Univ Bucharest, Fac Chem, Dept Chem Technol, Bucharest 030018, Romania

[2] Jacobs Univ Bremen, D-28759 Bremen, Germany

[3] Univ Ljubljana, Fac Chem & Chem Technol, SI-1000 Ljubljana, Slovenia

[4] Natl Inst Phys & Technol Mat, Magurele, Romania

[5] Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 346卷 / 1-2期

关键词：

Fe oxide; cinchonidine; silica-embedded colloids; TEM; XRD; Mossbauer; hydrogenolysis of bicyclo[2.2.2]oct-7-enes;

D O I：

10.1016/j.apcata.2008.04.024

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：

Fe3O4 colloids modified by the chiral ligand cinchonidine were prepared with the goal of obtaining a magnetic and catalytic nano-material and were subsequently embedded in silica to form a heterogeneous catalyst. The systems were characterized by TEM and XRD measurements, while the Mossbauer technique was applied for measuring the magnetic properties of the Fe3O4 colloids. The hyperfine magnetic field distribution was consistent with one type of Fe oxide, namely, the magnetite (Fe304). These colloids, both as 'quasi-homogenous catalysts' (or soluble heterogeneous catalysts) and embedded in silica (heterogeneous catalysts) were employed in the selective hydrogenolysis of complex bicyclo[2.2.2]oct-7-enes (bicyclo[2.2.2]oct-2-enes when unsubstituted). (C) 2008 Published by Elsevier B.V.

引用

页码：28 / 35

页数：8

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