-C₃N₄–Co₃O₄ Z-Scheme Junction with Green-Synthesized ZnO Photocatalyst for Efficient Degradation of Methylene Blue in Aqueous Solution

Figure 4

(a) Light absorption spectra of prepared catalytic samples. (b) The Tauc plot of g-C₃N₄, GZ, GC, GZC-1, GZC-2, GZC-3, GZC-4, and GZC-5 composites.

(a)

(b)