Fig. 4From: Photo-Fenton Degradation of AO7 and Photocatalytic Reduction of Cr(VI) over CQD-Decorated BiFeO3 Nanoparticles Under Visible and NIR Light Irradiationa UV-vis diffuse reflectance spectra of BiFeO3, CQD, and CQDs/BiFeO3 composites. b The corresponding first derivative of the diffuse reflectance spectraBack to article page