Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 1, Pages 109-114Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201201159
Keywords
Iron; Gold; Nanostructures; Electronic structure; Peroxidase mimics; Enzyme catalysis
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Funding
- National Natural Science Foundation of China [20671057]
- Major State Basic Research Development Program of China (973 Program) [2010CB933504]
- Science Funds for Distinguished Young Scientists of Shandong Province [JQ200903]
- Natural Science Foundation of Shandong Province [ZR2011BZ002]
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Sphere-like Fe3O4 aggregates were solvothermally prepared with ethylene glycol, sodium acetate and FeCl3 center dot 6H(2)O as raw materials. The sphere-like Fe3O4 aggregates provided heterogeneous growth sites for Au nanoparticles. These were obtained by reduction of HAuCl4 by sodium citrate under mild reaction conditions and the Fe3O4-Au nanocomposites were subsequently formed. The peroxidase-like activity of nanocomposites was studied with H2O2 and 3,3',5,5'-tetramethylbenzidine as substrates. Fe3O4-Au nanocomposites exhibited better catalytic activity than pure Fe3O4 aggregates, mainly resulting from the special electronic structure at the interfaces between the sphere-like Fe3O4 aggregates and the gold nanoparticles.
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