In this study, carbon nanotubes modified with different metal ions (M=Y, Ag and Pt) were employed for the fabrication of M-CNT/TiO2 electrodes. The fabricated electrodes were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray and photoelectrocatalytic activity. It was found that the photoelectrocatalytic degradation efficiencies of methylene blue solution over M-CNT/TiO2 electrodes were better than that of nonmetal ion-treated CNT/TiO2 electrodes. In comparison of the three M-CNT/TiO2 composites, the photoelectrocatalytic degradation efficiency (76%) of Ag-CNT/TiO2 for MB solution was the best results under visible light.
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Zhang et al. (2011) studied this question.
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