Figure 6From: Simple fabrication of N-doped mesoporous TiO2 nanorods with the enhanced visible light photocatalytic activityUV–vis spectra and Kubelka-Munk function. (a) UV–vis diffuse reflectance spectra for different samples and the respective Kubelka-Munk function for estimating the band gap energy (EBG) from variation of (αhν)1/2 with photon energy (hν) (b).Back to article page