Selective decoration of nickel and nickel oxide nanocrystals on multiwalled carbon nanotubes

A simple route to selective decoration of nickel and nickel oxide nanocrystals on multiwalled carbon nanotubes (MWCNTs) using nickel acetylacetonate (NAA) was successfully achieved for the first time. The homogeneously decorated nanocrystals on MWCNTs were investigated for their structure and morphology by various techniques, such as powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, field emission scanning electron microscopy and thermogravimetric analysis. It was found that the size distributions of the nanocrystals on MWCNTs ranged from 8 to 15 nm and they were well resolved. The precursor, NAA, was effectively employed to impregnate the MWCNTs, which on calcination at suitable temperatures and in the presence of hydrogen and nitrogen atmosphere gave rise to nickel and nickel oxide nanocrystals, respectively.

Graphical abstractNickel and nickel oxide nanocrystals were selectively and homogeneously decorated on multiwalled carbon nanotubes using nickel acetylacetonate, as a precursor in a simple and efficient route.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A simple route for decoration of nickel and nickel oxide nanocrystals on MWCNTs. ► Nickel acetylacetonate used as nickel source for the first time to impregnate on MWCNTs. ► Selective decoration was achieved by calcination in hydrogen and nitrogen atmospheres. ► The as-decorated nickel and nickel oxide nanocrystals are in the range of 8–15 nm.