Structural changes of TiO2 as a result of CNTs incorporation

The subject of this research work was to analyze the structural and morphological changes
of TiO2
as a result of incorporation of CNTs and interpret the underlying principles for the
observed interactions. Hybrid TiO2
/CNTs nanostructures were prepared by simplified solgel method followed by monitoring the thermally-induced alterations occurring up to 400
ºC. The effects of different type of CNTs (activated MWCNTs and as prepared SWCNTs)
as well as the variation of the content of MWCNTs in association with the metal-dopant (Pt
or Co) influencing the structural parameters of TiO2
was monitored. Addition of CNTs and
metallic phase causes reduction of TiO2
(anatase) crystallite size. The applied instrumental
techniques such as XRPD, Raman spectroscopy and thermal (TG, DTA and DTG) analysis
points out on achieved interaction between TiO2
and incorporated CNTs. Morphological
changes, observed from the SEM micrographs, revealed better inter-locking of the TiO2
matrix with SWCNTs than with MWCNTs. Formation of a more structurally disordered
and non-stoichiometric anatase phase seemed to be a preferred choice for the obtained
TiO2
-CNT-metalic phase nanocomposites for further utilization in sensor-design products.

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