Heterogeneous magnetic catalyst;
Palladium nanoparticle;
Cysteine amino acid;
Solvent-free aerobic oxidation of alcohol;
High selectivity;
BENZYL ALCOHOL;
MESOPOROUS SILICA;
SIZE CONTROL;
EFFICIENT;
FERRITE;
PD;
D O I:
10.1016/j.catcom.2013.09.029
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:
In this paper, Fe3O4 nanoparticles were coated by a number of amino acids, e.g. cysteine, serine, glycine and beta-alanine, via a simple method. Because of the surface modification of the magnetic nanoparticles with amino acid, the obtained magnetic nanocomposite is able to trap palladium nanoparticles through a strong interaction between the metal nanoparticles and the functional groups of amino acids. Among the synthesized nanocomposites, Fe3O4/cysteine-Pd exhibited the highest catalytic performance and excellent selectivity in the solvent-free aerobic oxidation of various alcohols, along with high level of reusability. (C) 2013 Elsevier B.V. All rights reserved.