Fig. 8. The absorbance vs. wavelength plots of c-zac heterostructures at an initial MB concentration of 10 ppm, a catalyst amount of 20 mg, and different pH values of (a) 4, (b) 7, (c) 9, (d and e) Ct/C0 and ln Ct/C0versus time plots of the NPs and heterostructures, respectively. The basic region (pH of 9) showed greater photocatalytic performance due to the attractive MB and catalyst electrostatic interaction effects.
