Figure 5.

Photocatalytic activity of the ZnO nanowires toward the photodegradation of methylene blue (MB). At (a) Time-dependent UV-Vis absorbance spectra of the MB solution using the prepared ZnO nanowires as photocatalysts and (b) Curves of the degradation rate of the MB dye and UV irradiation time with and without the photocatalyst of the prepared ZnO nanowires (C0 is the initial concentration of MB, C is the reaction concentration of MB at time t). Inset is the ln(C0/C) versus time curve of photodegradation of MB in the presence of the prepared ZnO nanowires.

Ma et al. Nanoscale Research Letters 2011 6:536   doi:10.1186/1556-276X-6-536
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