期刊
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
卷 6, 期 -, 页码 1192-1198出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.6.121
关键词
arenediazonium salts; chemical reduction; covalent modification; surface-modified nanoparticles; zerovalent iron nanoparticles
资金
- Ministry of Education and Science of the Russian Federation [4.2569.2014/K, 14.621.21.0004]
A novel approach for the in situ synthesis of zerovalent aryl-coated iron nanoparticles (NPs) based on diazonium salt chemistry is proposed. Surface-modified zerovalent iron NPs (ZVI NPs) were prepared by simple chemical reduction of iron(III) chloride aqueous solution followed by in situ modification using water soluble arenediazonium tosylate. The resulting NPs, with average iron core diameter of 21 nm, were coated with a 10 nm thick organic layer to provide long-term protection in air for the highly reactive zerovalent iron core up to 180 degrees C. The surface-modified iron NPs possess a high grafting density of the aryl group on the NPs surface of 1.23 mmol/g. FTIR spectroscopy, XRD, HRTEM, TGA/DTA, and elemental analysis were performed in order to characterize the resulting material.
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