Modification of Multi-walled Carbon Nanotubes with Nanoparticles for High Photocatalytic Activity
Tong Ling Tan,
Sharifah Bee Abd Hamid,
Chin Wei Lai.
Titanium dioxide (TiO2) nanoparticles were successfully attached to the outer surface of one dimensional oxidized
multi-walled carbon nanotubes (MWCNTs) via sol-gel technique. It was well-established that calcination temperature
played a critical role in controlling the crystallinity and phase of MWCNTs/TiO2 composites. Thus, the effects of calcination
temperature on the resulting MWCNTs/TiO2 were illustrated. The phase transition of MWCNTs/TiO2 composites
was determined using XRD analysis. The photocatalytic activity evaluation of MWCNTs/TiO2 composites was conducted
under degradation of organic dye (methyl orange solution). The results revealed that annealed MWCNTs/TiO2 composites
showed significantly enhanced photocatalytic activity due to the highly crystalline anatase TiO2 structures.
Keywords: Methyl orange, MWCNTs, Sol-gel, TiO2.
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