Metal nanoparticles inside microgel/clay nanohybrids: Synthesis, characterization and catalytic efficiency in cross-coupling reactions

被引：24

作者：

Contin, Andrea ^{[1
]}

Biffis, Andrea ^{[1
]}

Sterchele, Stefano ^{[1
]}

Doermbach, Karla ^{[2
]}

Schipmann, Susanne ^{[3
]}

Pich, Andrij ^{[2
]}

机构：

[1] Univ Padua, Dept Chem Sci, I-35131 Padua, Italy

[2] DWI RWTH Aachen Univ, D-52056 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Phys B 2, D-52056 Aachen, Germany

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 414卷

关键词：

Metal nanoparticles; Microgels; Nanogels; Laponite nanoclay; Nanocomposites; Cross-coupling; Palladium; Platinum; Gold; FUNCTIONAL RESINS; NANOCLUSTERS; CLAY;

D O I：

10.1016/j.jcis.2013.09.048

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：

Hypothesis: Laponite nanoclay embedded inside soluble crosslinked copolymers (microgels) may act as cation exchanger allowing loading of the microgels with cationic metal precursors, which upon reduction yield tailored ternary colloidal nanocomposites comprising both nanoclay and metal nanoparticles. Experiments: Microgel nanohybrids with variable Laponite nanoclay content were loaded with cationic precursors of different noble metals (Pd, Pt, Au); subsequent reduction by several methods yielded ternary nanocomposites which were extensively characterized. Nanocomposites based on Pd were also tested as catalysts in standard Suzuki and Sonogashira cross-coupling reactions. Findings: The proposed method for the production of ternary nanocomposite microgels has been validated. The factors influencing the final metal nanoparticle size (nature of the reducing agent, clay content in the microgel) have been determined and rationalized. The resulting Pd-containing ternary nanocomposite microgels are viable catalysts of standard cross coupling reactions in water-rich medium. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：41 / 45

页数：5

共 27 条

[1] Nonclassical shapes of noble-metal colloids by synthesis in microgel nanoreactors [J].