Abstract
We demonstrate a novel top-down synthesis of photocatalytic nanocomposites coupled with multi-walled carbon nanotubes (MWCNTs). TiO2 nanoparticles were directly grown on and fully covered the MWCNTs' surface via room-temperature hydrolysis of NH4TiOF3 micro-single crystals. A similar full coating of TiO2 was extended to graphene oxides (GOs). X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, thermal gravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) surface area analysis were employed for characterization of products. The photocatalytic activities of the MWCNT/TiO2 nanocomposites are strongly influenced by the TiO2 coverage on the MWCNTs. Among the synthesized nanocomposites, the 4.9% MWCNT/TiO2 nanocomposite demonstrated the highest photodegradation as well as the lowest adsorption of methylene blue (MB).
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