Figure 8From: Surfactant-free synthesis of Cu2O hollow spheres and their wavelength-dependent visible photocatalytic activities using LED lamps as cold light sourcesDegradation of MO in the presence of Cu 2 O hollow spheres. Degradation of MO in the presence of Cu2O hollow spheres prepared at different temperatures irradiated by different wavelengths of visible lights (a-f) and photocatalytic mechanism (g).Back to article page