Fig. 7From: The impregnation of ZnO onto ZSM-5 derived from red mud for photocatalytic degradation of methylene blue(a) Absorption spectra and (b) band gap calculation of ZnO, 34-ZnO/ZSM-5, 54-ZnO/ZSM-5, 67-ZnO/ZSM-5, and ZSM-5Back to article page