Abstract
A chemical route to decorate MWCNTs by titanium nanoparticles has been developed.MWCNTs, grown by catalytic decomposition of propane, have been used to prepareintercalated K-MWCNTs, which are then reacted with Ti(IV) isopropoxide. The amount ofTi present in the nanostructure is 8.7 wt%. Several techniques have been used for a detailedcharacterization of MWCNTs decorated by Ti nanoparticles, such as transmission electronmicroscopy (TEM), selected-area electron diffraction (SAED), high resolution transmissionelectron microscopy (HREM) and electron energy loss spectroscopy (EELS) as well asRaman spectroscopy and x-ray diffraction (XRD). Titanium is found to be present asα-Ti(hcp) dispersed in very small particles, the size of the largest being∼2 nm. The Ti-containing phase appears to be fairly homogeneously distributed in the spacebetween the two sides of a MWCNT. No intercalation of Ti between the CNT walls hasbeen detected.
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