Figure 6.

A Absorption spectra of original MO solution of 10 mg/L (a) and MO solution before irradiation over various samples: pure TiO2 (b), TiO2 NPs-coated CNTs with CNTs/TiO2 molar ratios of 1/4 (c), 1/2 (d), 1/1 (e), 2/1 (f), and 4/1 (g), and pure CNTs (h). B Absorption spectra of MO solution after 10 min of irradiation over various samples: pure TiO2 (a), pure CNTs (b), and TiO2 NPs-coated CNTs with CNTs/TiO2 molar ratios of 1/4 (c), 1/2 (d), 1/1 (e), 2/1 (f), and 4/1 (g)

Xie et al. Nanoscale Research Letters 2009 5:603-607   doi:10.1007/s11671-009-9513-5