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

Figure 7

(a) UV absorbance of MB dye at different time intervals for the GZC-3. (b) First-order kinetics in MB dye. (c) Logarithm versus time of g-C₃N₄, ZnO,Co₃O₄, GZ, GC, GZC-1, GZC-2, GZC-3, GZC-4, and GZC-5. (d) Degradation rate constant k (min⁻¹) of the as-prepared samples against g-C₃N₄, GZ, GC, GZC-1, GZC-2, GZC-3, GZC-4, and GZC-5.

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(b)

(c)

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