Synthesis and Photocatalytic Activity of Carbon Nanotubes/Titanium Dioxide Nanocomposites

doi:10.15541/jim20150078

Abstract

Abstract:

CNTs/TiO₂ nanocomposites were prepared by Sol-Gel method without any surfactant. The as-prepaired samples were characterizated by using X-ray diffraction, transmission electron microscope, high resolution transmission electron microscopy, selected area electron diffraction and UV-Vis spectrophotometer. The degradation experiment of the methylene blue under UV-light was used to evaluate the catalytic activity of the CNTs/TiO₂ catalysts, and the influence factors of catalytic efficiency such as CNTs doping concentration were studied systematically. The results suggest that the anatase titanium dioxide coat on the surfaces of CNTs uniformly in the form of C-O-Ti after annealing at 450℃, and the size of TiO₂ nano-particle is about 16 nm. Moreover, CNTs/TiO₂nanocomposites show a distimctive photodegradation efficiency, CNTs/TiO₂ nanocomposites with 1wt% CNTs present an increase of photodegradation efficiency by 11.7% as regarding to pure TiO₂.

Key words: CNTs, TiO2, photodegradation efficiency

CLC Number:

O643

MA Bao-Lu, ZHANG Yue. Synthesis and Photocatalytic Activity of Carbon Nanotubes/Titanium Dioxide Nanocomposites[J]. Journal of Inorganic Materials, 2015, 30(9): 937-942.

Figures/Tables 9

Fig. 1 Photocatalytic activity of TiO2 calcined at different temperatures

Fig. 2 Photocatalytic activity of the CNTs/TiO2 doped with different amounts of CNTs

Fig. 3 UV-Vis absorption spectra of samples

Fig. 4 XRD patterns of the pure TiO2 and 1wt% CNTs/TiO2

Fig. 5 TEM images of CNTs/TiO2

Fig. 6 IR spectra of pre-treated CNTs

Fig. 7 IR spectra of CNTs/TiO2

Fig. 8 Formation process of CNTs/TiO2

Fig. 9 Photocatalysis mechanism of CNTs/TiO2 nanocomposites

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